Merge branch 'master' into add-separate-access-for-use-named-collections

2024-11-10 09:32:06 +00:00 · 2023-07-05 12:05:49 +02:00 · 2023-07-05 12:05:49 +02:00 · dcda3576d2
commit dcda3576d2
parent 6bca452924 2ce7bcaa3d
107 changed files with 1651 additions and 1131 deletions
--- a/README.md
+++ b/README.md
@ -16,8 +16,9 @@ curl https://clickhouse.com/ | sh
 * [YouTube channel](https://www.youtube.com/c/ClickHouseDB) has a lot of content about ClickHouse in video format.
 * [Slack](https://clickhouse.com/slack) and [Telegram](https://telegram.me/clickhouse_en) allow chatting with ClickHouse users in real-time.
 * [Blog](https://clickhouse.com/blog/) contains various ClickHouse-related articles, as well as announcements and reports about events.
-* [Code Browser (Woboq)](https://clickhouse.com/codebrowser/ClickHouse/index.html) with syntax highlight and navigation.
-* [Code Browser (github.dev)](https://github.dev/ClickHouse/ClickHouse) with syntax highlight, powered by github.dev.
+* [Code Browser (Woboq)](https://clickhouse.com/codebrowser/ClickHouse/index.html) with syntax highlighting and navigation.
+* [Code Browser (github.dev)](https://github.dev/ClickHouse/ClickHouse) with syntax highlighting, powered by github.dev.
+* [Static Analysis (SonarCloud)](https://sonarcloud.io/project/issues?resolved=false&id=ClickHouse_ClickHouse) proposes C++ quality improvements.
 * [Contacts](https://clickhouse.com/company/contact) can help to get your questions answered if there are any.

 ## Upcoming Events
--- a/base/base/hex.h
+++ b/base/base/hex.h
@ -4,212 +4,288 @@
 #include <cstring>
 #include "types.h"

-/// Maps 0..15 to 0..9A..F or 0..9a..f correspondingly.
+namespace CityHash_v1_0_2 { struct uint128; }

-constexpr inline std::string_view hex_digit_to_char_uppercase_table = "0123456789ABCDEF";
-constexpr inline std::string_view hex_digit_to_char_lowercase_table = "0123456789abcdef";
+namespace wide
+{
+    template <size_t Bits, typename Signed>
+    class integer;
+}
+
+namespace impl
+{
+    /// Maps 0..15 to 0..9A..F or 0..9a..f correspondingly.
+    constexpr inline std::string_view hex_digit_to_char_uppercase_table = "0123456789ABCDEF";
+    constexpr inline std::string_view hex_digit_to_char_lowercase_table = "0123456789abcdef";
+
+    /// Maps 0..255 to 00..FF or 00..ff correspondingly.
+    constexpr inline std::string_view hex_byte_to_char_uppercase_table = //
+        "000102030405060708090A0B0C0D0E0F"
+        "101112131415161718191A1B1C1D1E1F"
+        "202122232425262728292A2B2C2D2E2F"
+        "303132333435363738393A3B3C3D3E3F"
+        "404142434445464748494A4B4C4D4E4F"
+        "505152535455565758595A5B5C5D5E5F"
+        "606162636465666768696A6B6C6D6E6F"
+        "707172737475767778797A7B7C7D7E7F"
+        "808182838485868788898A8B8C8D8E8F"
+        "909192939495969798999A9B9C9D9E9F"
+        "A0A1A2A3A4A5A6A7A8A9AAABACADAEAF"
+        "B0B1B2B3B4B5B6B7B8B9BABBBCBDBEBF"
+        "C0C1C2C3C4C5C6C7C8C9CACBCCCDCECF"
+        "D0D1D2D3D4D5D6D7D8D9DADBDCDDDEDF"
+        "E0E1E2E3E4E5E6E7E8E9EAEBECEDEEEF"
+        "F0F1F2F3F4F5F6F7F8F9FAFBFCFDFEFF";
+
+    constexpr inline std::string_view hex_byte_to_char_lowercase_table = //
+        "000102030405060708090a0b0c0d0e0f"
+        "101112131415161718191a1b1c1d1e1f"
+        "202122232425262728292a2b2c2d2e2f"
+        "303132333435363738393a3b3c3d3e3f"
+        "404142434445464748494a4b4c4d4e4f"
+        "505152535455565758595a5b5c5d5e5f"
+        "606162636465666768696a6b6c6d6e6f"
+        "707172737475767778797a7b7c7d7e7f"
+        "808182838485868788898a8b8c8d8e8f"
+        "909192939495969798999a9b9c9d9e9f"
+        "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
+        "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
+        "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
+        "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
+        "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
+        "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
+
+    /// Maps 0..255 to 00000000..11111111 correspondingly.
+    constexpr inline std::string_view bin_byte_to_char_table = //
+        "0000000000000001000000100000001100000100000001010000011000000111"
+        "0000100000001001000010100000101100001100000011010000111000001111"
+        "0001000000010001000100100001001100010100000101010001011000010111"
+        "0001100000011001000110100001101100011100000111010001111000011111"
+        "0010000000100001001000100010001100100100001001010010011000100111"
+        "0010100000101001001010100010101100101100001011010010111000101111"
+        "0011000000110001001100100011001100110100001101010011011000110111"
+        "0011100000111001001110100011101100111100001111010011111000111111"
+        "0100000001000001010000100100001101000100010001010100011001000111"
+        "0100100001001001010010100100101101001100010011010100111001001111"
+        "0101000001010001010100100101001101010100010101010101011001010111"
+        "0101100001011001010110100101101101011100010111010101111001011111"
+        "0110000001100001011000100110001101100100011001010110011001100111"
+        "0110100001101001011010100110101101101100011011010110111001101111"
+        "0111000001110001011100100111001101110100011101010111011001110111"
+        "0111100001111001011110100111101101111100011111010111111001111111"
+        "1000000010000001100000101000001110000100100001011000011010000111"
+        "1000100010001001100010101000101110001100100011011000111010001111"
+        "1001000010010001100100101001001110010100100101011001011010010111"
+        "1001100010011001100110101001101110011100100111011001111010011111"
+        "1010000010100001101000101010001110100100101001011010011010100111"
+        "1010100010101001101010101010101110101100101011011010111010101111"
+        "1011000010110001101100101011001110110100101101011011011010110111"
+        "1011100010111001101110101011101110111100101111011011111010111111"
+        "1100000011000001110000101100001111000100110001011100011011000111"
+        "1100100011001001110010101100101111001100110011011100111011001111"
+        "1101000011010001110100101101001111010100110101011101011011010111"
+        "1101100011011001110110101101101111011100110111011101111011011111"
+        "1110000011100001111000101110001111100100111001011110011011100111"
+        "1110100011101001111010101110101111101100111011011110111011101111"
+        "1111000011110001111100101111001111110100111101011111011011110111"
+        "1111100011111001111110101111101111111100111111011111111011111111";
+
+    /// Maps 0..9, A..F, a..f to 0..15. Other chars are mapped to implementation specific value.
+    constexpr inline std::string_view hex_char_to_digit_table
+        = {"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\xff\xff\xff\xff\xff\xff" //0-9
+        "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //A-Z
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //a-z
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+        "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
+        256};
+
+    /// Converts a hex digit '0'..'f' or '0'..'F' to its value 0..15.
+    constexpr UInt8 unhexDigit(char c)
+    {
+        return hex_char_to_digit_table[static_cast<UInt8>(c)];
+    }
+
+    /// Converts an unsigned integer in the native endian to hexadecimal representation and back. Used as a base class for HexConversion<T>.
+    template <typename TUInt, typename = void>
+    struct HexConversionUInt
+    {
+        static const constexpr size_t num_hex_digits = sizeof(TUInt) * 2;
+
+        static void hex(TUInt uint_, char * out, std::string_view table)
+        {
+            union
+            {
+                TUInt value;
+                UInt8 uint8[sizeof(TUInt)];
+            };
+
+            value = uint_;
+
+            for (size_t i = 0; i < sizeof(TUInt); ++i)
+            {
+                if constexpr (std::endian::native == std::endian::little)
+                    memcpy(out + i * 2, &table[static_cast<size_t>(uint8[sizeof(TUInt) - 1 - i]) * 2], 2);
+                else
+                    memcpy(out + i * 2, &table[static_cast<size_t>(uint8[i]) * 2], 2);
+            }
+        }
+
+        static TUInt unhex(const char * data)
+        {
+            TUInt res;
+            if constexpr (sizeof(TUInt) == 1)
+            {
+                res = static_cast<UInt8>(unhexDigit(data[0])) * 0x10 + static_cast<UInt8>(unhexDigit(data[1]));
+            }
+            else if constexpr (sizeof(TUInt) == 2)
+            {
+                res = static_cast<UInt16>(unhexDigit(data[0])) * 0x1000 + static_cast<UInt16>(unhexDigit(data[1])) * 0x100
+                    + static_cast<UInt16>(unhexDigit(data[2])) * 0x10 + static_cast<UInt16>(unhexDigit(data[3]));
+            }
+            else if constexpr ((sizeof(TUInt) <= 8) || ((sizeof(TUInt) % 8) != 0))
+            {
+                res = 0;
+                for (size_t i = 0; i < sizeof(TUInt) * 2; ++i, ++data)
+                {
+                    res <<= 4;
+                    res += unhexDigit(*data);
+                }
+            }
+            else
+            {
+                res = 0;
+                for (size_t i = 0; i < sizeof(TUInt) / 8; ++i, data += 16)
+                {
+                    res <<= 64;
+                    res += HexConversionUInt<UInt64>::unhex(data);
+                }
+            }
+            return res;
+        }
+    };
+
+    /// Helper template class to convert a value of any supported type to hexadecimal representation and back.
+    template <typename T, typename SFINAE = void>
+    struct HexConversion;
+
+    template <typename TUInt>
+    struct HexConversion<TUInt, std::enable_if_t<std::is_integral_v<TUInt>>> : public HexConversionUInt<TUInt> {};
+
+    template <size_t Bits, typename Signed>
+    struct HexConversion<wide::integer<Bits, Signed>> : public HexConversionUInt<wide::integer<Bits, Signed>> {};
+
+    template <typename CityHashUInt128> /// Partial specialization here allows not to include <city.h> in this header.
+    struct HexConversion<CityHashUInt128, std::enable_if_t<std::is_same_v<CityHashUInt128, typename CityHash_v1_0_2::uint128>>>
+    {
+        static const constexpr size_t num_hex_digits = 32;
+
+        static void hex(const CityHashUInt128 & uint_, char * out, std::string_view table)
+        {
+            HexConversion<UInt64>::hex(uint_.high64, out, table);
+            HexConversion<UInt64>::hex(uint_.low64, out + 16, table);
+        }
+
+        static CityHashUInt128 unhex(const char * data)
+        {
+            CityHashUInt128 res;
+            res.high64 = HexConversion<UInt64>::unhex(data);
+            res.low64 = HexConversion<UInt64>::unhex(data + 16);
+            return res;
+        }
+    };
+}
+
+/// Produces a hexadecimal representation of an integer value with leading zeros (for checksums).
+/// The function supports native integer types, wide::integer, CityHash_v1_0_2::uint128.
+/// It can be used with signed types as well, however they are written as corresponding unsigned numbers
+/// using two's complement (i.e. for example "-1" is written as "0xFF", not as "-0x01").
+template <typename T>
+void writeHexUIntUppercase(const T & value, char * out)
+{
+    impl::HexConversion<T>::hex(value, out, impl::hex_byte_to_char_uppercase_table);
+}
+
+template <typename T>
+void writeHexUIntLowercase(const T & value, char * out)
+{
+    impl::HexConversion<T>::hex(value, out, impl::hex_byte_to_char_lowercase_table);
+}
+
+template <typename T>
+std::string getHexUIntUppercase(const T & value)
+{
+    std::string res(impl::HexConversion<T>::num_hex_digits, '\0');
+    writeHexUIntUppercase(value, res.data());
+    return res;
+}
+
+template <typename T>
+std::string getHexUIntLowercase(const T & value)
+{
+    std::string res(impl::HexConversion<T>::num_hex_digits, '\0');
+    writeHexUIntLowercase(value, res.data());
+    return res;
+}

 constexpr char hexDigitUppercase(unsigned char c)
 {
-    return hex_digit_to_char_uppercase_table[c];
+    return impl::hex_digit_to_char_uppercase_table[c];
 }
+
 constexpr char hexDigitLowercase(unsigned char c)
 {
-    return hex_digit_to_char_lowercase_table[c];
+    return impl::hex_digit_to_char_lowercase_table[c];
 }

-/// Maps 0..255 to 00..FF or 00..ff correspondingly
-
-constexpr inline std::string_view hex_byte_to_char_uppercase_table = //
-    "000102030405060708090A0B0C0D0E0F"
-    "101112131415161718191A1B1C1D1E1F"
-    "202122232425262728292A2B2C2D2E2F"
-    "303132333435363738393A3B3C3D3E3F"
-    "404142434445464748494A4B4C4D4E4F"
-    "505152535455565758595A5B5C5D5E5F"
-    "606162636465666768696A6B6C6D6E6F"
-    "707172737475767778797A7B7C7D7E7F"
-    "808182838485868788898A8B8C8D8E8F"
-    "909192939495969798999A9B9C9D9E9F"
-    "A0A1A2A3A4A5A6A7A8A9AAABACADAEAF"
-    "B0B1B2B3B4B5B6B7B8B9BABBBCBDBEBF"
-    "C0C1C2C3C4C5C6C7C8C9CACBCCCDCECF"
-    "D0D1D2D3D4D5D6D7D8D9DADBDCDDDEDF"
-    "E0E1E2E3E4E5E6E7E8E9EAEBECEDEEEF"
-    "F0F1F2F3F4F5F6F7F8F9FAFBFCFDFEFF";
-
-constexpr inline std::string_view hex_byte_to_char_lowercase_table = //
-    "000102030405060708090a0b0c0d0e0f"
-    "101112131415161718191a1b1c1d1e1f"
-    "202122232425262728292a2b2c2d2e2f"
-    "303132333435363738393a3b3c3d3e3f"
-    "404142434445464748494a4b4c4d4e4f"
-    "505152535455565758595a5b5c5d5e5f"
-    "606162636465666768696a6b6c6d6e6f"
-    "707172737475767778797a7b7c7d7e7f"
-    "808182838485868788898a8b8c8d8e8f"
-    "909192939495969798999a9b9c9d9e9f"
-    "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
-    "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
-    "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
-    "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
-    "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
-    "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
-
 inline void writeHexByteUppercase(UInt8 byte, void * out)
 {
-    memcpy(out, &hex_byte_to_char_uppercase_table[static_cast<size_t>(byte) * 2], 2);
+    memcpy(out, &impl::hex_byte_to_char_uppercase_table[static_cast<size_t>(byte) * 2], 2);
 }

 inline void writeHexByteLowercase(UInt8 byte, void * out)
 {
-    memcpy(out, &hex_byte_to_char_lowercase_table[static_cast<size_t>(byte) * 2], 2);
+    memcpy(out, &impl::hex_byte_to_char_lowercase_table[static_cast<size_t>(byte) * 2], 2);
 }

-constexpr inline std::string_view bin_byte_to_char_table = //
-    "0000000000000001000000100000001100000100000001010000011000000111"
-    "0000100000001001000010100000101100001100000011010000111000001111"
-    "0001000000010001000100100001001100010100000101010001011000010111"
-    "0001100000011001000110100001101100011100000111010001111000011111"
-    "0010000000100001001000100010001100100100001001010010011000100111"
-    "0010100000101001001010100010101100101100001011010010111000101111"
-    "0011000000110001001100100011001100110100001101010011011000110111"
-    "0011100000111001001110100011101100111100001111010011111000111111"
-    "0100000001000001010000100100001101000100010001010100011001000111"
-    "0100100001001001010010100100101101001100010011010100111001001111"
-    "0101000001010001010100100101001101010100010101010101011001010111"
-    "0101100001011001010110100101101101011100010111010101111001011111"
-    "0110000001100001011000100110001101100100011001010110011001100111"
-    "0110100001101001011010100110101101101100011011010110111001101111"
-    "0111000001110001011100100111001101110100011101010111011001110111"
-    "0111100001111001011110100111101101111100011111010111111001111111"
-    "1000000010000001100000101000001110000100100001011000011010000111"
-    "1000100010001001100010101000101110001100100011011000111010001111"
-    "1001000010010001100100101001001110010100100101011001011010010111"
-    "1001100010011001100110101001101110011100100111011001111010011111"
-    "1010000010100001101000101010001110100100101001011010011010100111"
-    "1010100010101001101010101010101110101100101011011010111010101111"
-    "1011000010110001101100101011001110110100101101011011011010110111"
-    "1011100010111001101110101011101110111100101111011011111010111111"
-    "1100000011000001110000101100001111000100110001011100011011000111"
-    "1100100011001001110010101100101111001100110011011100111011001111"
-    "1101000011010001110100101101001111010100110101011101011011010111"
-    "1101100011011001110110101101101111011100110111011101111011011111"
-    "1110000011100001111000101110001111100100111001011110011011100111"
-    "1110100011101001111010101110101111101100111011011110111011101111"
-    "1111000011110001111100101111001111110100111101011111011011110111"
-    "1111100011111001111110101111101111111100111111011111111011111111";
-
-inline void writeBinByte(UInt8 byte, void * out)
+/// Converts a hex representation with leading zeros back to an integer value.
+/// The function supports native integer types, wide::integer, CityHash_v1_0_2::uint128.
+template <typename T>
+constexpr T unhexUInt(const char * data)
 {
-    memcpy(out, &bin_byte_to_char_table[static_cast<size_t>(byte) * 8], 8);
+    return impl::HexConversion<T>::unhex(data);
 }

-/// Produces hex representation of an unsigned int with leading zeros (for checksums)
-template <typename TUInt>
-inline void writeHexUIntImpl(TUInt uint_, char * out, std::string_view table)
-{
-    union
-    {
-        TUInt value;
-        UInt8 uint8[sizeof(TUInt)];
-    };
-
-    value = uint_;
-
-    for (size_t i = 0; i < sizeof(TUInt); ++i)
-    {
-        if constexpr (std::endian::native == std::endian::little)
-            memcpy(out + i * 2, &table[static_cast<size_t>(uint8[sizeof(TUInt) - 1 - i]) * 2], 2);
-        else
-            memcpy(out + i * 2, &table[static_cast<size_t>(uint8[i]) * 2], 2);
-    }
-}
-
-template <typename TUInt>
-inline void writeHexUIntUppercase(TUInt uint_, char * out)
-{
-    writeHexUIntImpl(uint_, out, hex_byte_to_char_uppercase_table);
-}
-
-template <typename TUInt>
-inline void writeHexUIntLowercase(TUInt uint_, char * out)
-{
-    writeHexUIntImpl(uint_, out, hex_byte_to_char_lowercase_table);
-}
-
-template <typename TUInt>
-std::string getHexUIntUppercase(TUInt uint_)
-{
-    std::string res(sizeof(TUInt) * 2, '\0');
-    writeHexUIntUppercase(uint_, res.data());
-    return res;
-}
-
-template <typename TUInt>
-std::string getHexUIntLowercase(TUInt uint_)
-{
-    std::string res(sizeof(TUInt) * 2, '\0');
-    writeHexUIntLowercase(uint_, res.data());
-    return res;
-}
-
-/// Maps 0..9, A..F, a..f to 0..15. Other chars are mapped to implementation specific value.
-
-constexpr inline std::string_view hex_char_to_digit_table
-    = {"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\xff\xff\xff\xff\xff\xff" //0-9
-       "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //A-Z
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\x0a\x0b\x0c\x0d\x0e\x0f\xff\xff\xff\xff\xff\xff\xff\xff\xff" //a-z
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
-       "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff",
-       256};
-
+/// Converts a hexadecimal digit '0'..'f' or '0'..'F' to UInt8.
 constexpr UInt8 unhex(char c)
 {
-    return hex_char_to_digit_table[static_cast<UInt8>(c)];
+    return impl::unhexDigit(c);
 }

+/// Converts two hexadecimal digits to UInt8.
 constexpr UInt8 unhex2(const char * data)
 {
-    return static_cast<UInt8>(unhex(data[0])) * 0x10 + static_cast<UInt8>(unhex(data[1]));
+    return unhexUInt<UInt8>(data);
 }

+/// Converts four hexadecimal digits to UInt16.
 constexpr UInt16 unhex4(const char * data)
 {
-    return static_cast<UInt16>(unhex(data[0])) * 0x1000 + static_cast<UInt16>(unhex(data[1])) * 0x100
-        + static_cast<UInt16>(unhex(data[2])) * 0x10 + static_cast<UInt16>(unhex(data[3]));
+    return unhexUInt<UInt16>(data);
 }

-template <typename TUInt>
-constexpr TUInt unhexUInt(const char * data)
+/// Produces a binary representation of a single byte.
+inline void writeBinByte(UInt8 byte, void * out)
 {
-    TUInt res = 0;
-    if constexpr ((sizeof(TUInt) <= 8) || ((sizeof(TUInt) % 8) != 0))
-    {
-        for (size_t i = 0; i < sizeof(TUInt) * 2; ++i, ++data)
-        {
-            res <<= 4;
-            res += unhex(*data);
-        }
-    }
-    else
-    {
-        for (size_t i = 0; i < sizeof(TUInt) / 8; ++i, data += 16)
-        {
-            res <<= 64;
-            res += unhexUInt<UInt64>(data);
-        }
-    }
-    return res;
+    memcpy(out, &impl::bin_byte_to_char_table[static_cast<size_t>(byte) * 8], 8);
 }
--- a/base/poco/Foundation/CMakeLists.txt
+++ b/base/poco/Foundation/CMakeLists.txt
@ -87,7 +87,6 @@ set (SRCS
    src/LoggingRegistry.cpp
    src/LogStream.cpp
    src/MD5Engine.cpp
-    src/MemoryPool.cpp
    src/MemoryStream.cpp
    src/Message.cpp
    src/Mutex.cpp
--- a/base/poco/Foundation/include/Poco/MemoryPool.h
+++ b/base/poco/Foundation/include/Poco/MemoryPool.h
@ -1,116 +0,0 @@
-//
-// MemoryPool.h
-//
-// Library: Foundation
-// Package: Core
-// Module:  MemoryPool
-//
-// Definition of the MemoryPool class.
-//
-// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
-// and Contributors.
-//
-// SPDX-License-Identifier:	BSL-1.0
-//
-
-
-#ifndef Foundation_MemoryPool_INCLUDED
-#define Foundation_MemoryPool_INCLUDED
-
-
-#include <cstddef>
-#include <vector>
-#include "Poco/Foundation.h"
-#include "Poco/Mutex.h"
-
-
-namespace Poco
-{
-
-
-class Foundation_API MemoryPool
-/// A simple pool for fixed-size memory blocks.
-///
-/// The main purpose of this class is to speed-up
-/// memory allocations, as well as to reduce memory
-/// fragmentation in situations where the same blocks
-/// are allocated all over again, such as in server
-/// applications.
-///
-/// All allocated blocks are retained for future use.
-/// A limit on the number of blocks can be specified.
-/// Blocks can be preallocated.
-{
-public:
-    MemoryPool(std::size_t blockSize, int preAlloc = 0, int maxAlloc = 0);
-    /// Creates a MemoryPool for blocks with the given blockSize.
-    /// The number of blocks given in preAlloc are preallocated.
-
-    ~MemoryPool();
-
-    void * get();
-    /// Returns a memory block. If there are no more blocks
-    /// in the pool, a new block will be allocated.
-    ///
-    /// If maxAlloc blocks are already allocated, an
-    /// OutOfMemoryException is thrown.
-
-    void release(void * ptr);
-    /// Releases a memory block and returns it to the pool.
-
-    std::size_t blockSize() const;
-    /// Returns the block size.
-
-    int allocated() const;
-    /// Returns the number of allocated blocks.
-
-    int available() const;
-    /// Returns the number of available blocks in the pool.
-
-private:
-    MemoryPool();
-    MemoryPool(const MemoryPool &);
-    MemoryPool & operator=(const MemoryPool &);
-
-    void clear();
-
-    enum
-    {
-        BLOCK_RESERVE = 128
-    };
-
-    typedef std::vector<char *> BlockVec;
-
-    std::size_t _blockSize;
-    int _maxAlloc;
-    int _allocated;
-    BlockVec _blocks;
-    FastMutex _mutex;
-};
-
-
-//
-// inlines
-//
-inline std::size_t MemoryPool::blockSize() const
-{
-    return _blockSize;
-}
-
-
-inline int MemoryPool::allocated() const
-{
-    return _allocated;
-}
-
-
-inline int MemoryPool::available() const
-{
-    return (int)_blocks.size();
-}
-
-
-} // namespace Poco
-
-
-#endif // Foundation_MemoryPool_INCLUDED
--- a/base/poco/Foundation/src/MemoryPool.cpp
+++ b/base/poco/Foundation/src/MemoryPool.cpp
@ -1,105 +0,0 @@
-//
-// MemoryPool.cpp
-//
-// Library: Foundation
-// Package: Core
-// Module:  MemoryPool
-//
-// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
-// and Contributors.
-//
-// SPDX-License-Identifier:	BSL-1.0
-//
-
-
-#include "Poco/MemoryPool.h"
-#include "Poco/Exception.h"
-
-
-namespace Poco {
-
-
-MemoryPool::MemoryPool(std::size_t blockSize, int preAlloc, int maxAlloc):
-	_blockSize(blockSize),
-	_maxAlloc(maxAlloc),
-	_allocated(preAlloc)
-{
-	poco_assert (maxAlloc == 0 || maxAlloc >= preAlloc);
-	poco_assert (preAlloc >= 0 && maxAlloc >= 0);
-
-	int r = BLOCK_RESERVE;
-	if (preAlloc > r)
-		r = preAlloc;
-	if (maxAlloc > 0 && maxAlloc < r)
-		r = maxAlloc;
-	_blocks.reserve(r);
-	
-	try
-	{
-		for (int i = 0; i < preAlloc; ++i)
-		{
-			_blocks.push_back(new char[_blockSize]);
-		}
-	}
-	catch (...)
-	{
-		clear();
-		throw;
-	}
-}
-
-	
-MemoryPool::~MemoryPool()
-{
-	clear();
-}
-
-
-void MemoryPool::clear()
-{
-	for (BlockVec::iterator it = _blocks.begin(); it != _blocks.end(); ++it)
-	{
-		delete [] *it;
-	}
-	_blocks.clear();
-}
-
-
-void* MemoryPool::get()
-{
-	FastMutex::ScopedLock lock(_mutex);
-	
-	if (_blocks.empty())
-	{
-		if (_maxAlloc == 0 || _allocated < _maxAlloc)
-		{
-			++_allocated;
-			return new char[_blockSize];
-		}
-		else throw OutOfMemoryException("MemoryPool exhausted");
-	}
-	else
-	{
-		char* ptr = _blocks.back();
-		_blocks.pop_back();
-		return ptr;
-	}
-}
-
-	
-void MemoryPool::release(void* ptr)
-{
-	FastMutex::ScopedLock lock(_mutex);
-	
-	try
-	{
-		_blocks.push_back(reinterpret_cast<char*>(ptr));
-	}
-	catch (...)
-	{
-		delete [] reinterpret_cast<char*>(ptr);
-	}
-}
-
-
-} // namespace Poco
--- a/base/poco/Net/include/Poco/Net/HTTPBasicStreamBuf.h
+++ b/base/poco/Net/include/Poco/Net/HTTPBasicStreamBuf.h
@ -19,7 +19,6 @@


 #include "Poco/BufferedStreamBuf.h"
-#include "Poco/Net/HTTPBufferAllocator.h"
 #include "Poco/Net/Net.h"


@ -27,9 +26,9 @@ namespace Poco
 {
 namespace Net
 {
+    constexpr size_t HTTP_DEFAULT_BUFFER_SIZE = 8 * 1024;

-
-    typedef Poco::BasicBufferedStreamBuf<char, std::char_traits<char>, HTTPBufferAllocator> HTTPBasicStreamBuf;
+    typedef Poco::BasicBufferedStreamBuf<char, std::char_traits<char>> HTTPBasicStreamBuf;


 }
--- a/base/poco/Net/include/Poco/Net/HTTPBufferAllocator.h
+++ b/base/poco/Net/include/Poco/Net/HTTPBufferAllocator.h
@ -1,53 +0,0 @@
-//
-// HTTPBufferAllocator.h
-//
-// Library: Net
-// Package: HTTP
-// Module:  HTTPBufferAllocator
-//
-// Definition of the HTTPBufferAllocator class.
-//
-// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
-// and Contributors.
-//
-// SPDX-License-Identifier:	BSL-1.0
-//
-
-
-#ifndef Net_HTTPBufferAllocator_INCLUDED
-#define Net_HTTPBufferAllocator_INCLUDED
-
-
-#include <ios>
-#include "Poco/MemoryPool.h"
-#include "Poco/Net/Net.h"
-
-
-namespace Poco
-{
-namespace Net
-{
-
-
-    class Net_API HTTPBufferAllocator
-    /// A BufferAllocator for HTTP streams.
-    {
-    public:
-        static char * allocate(std::streamsize size);
-        static void deallocate(char * ptr, std::streamsize size);
-
-        enum
-        {
-            BUFFER_SIZE = 128 * 1024
-        };
-
-    private:
-        static Poco::MemoryPool _pool;
-    };
-
-
-}
-} // namespace Poco::Net
-
-
-#endif // Net_HTTPBufferAllocator_INCLUDED
--- a/base/poco/Net/include/Poco/Net/HTTPChunkedStream.h
+++ b/base/poco/Net/include/Poco/Net/HTTPChunkedStream.h
@ -21,7 +21,6 @@
 #include <cstddef>
 #include <istream>
 #include <ostream>
-#include "Poco/MemoryPool.h"
 #include "Poco/Net/HTTPBasicStreamBuf.h"
 #include "Poco/Net/Net.h"

@ -80,12 +79,6 @@ namespace Net
    public:
        HTTPChunkedInputStream(HTTPSession & session);
        ~HTTPChunkedInputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


@ -95,12 +88,6 @@ namespace Net
    public:
        HTTPChunkedOutputStream(HTTPSession & session);
        ~HTTPChunkedOutputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


--- a/base/poco/Net/include/Poco/Net/HTTPFixedLengthStream.h
+++ b/base/poco/Net/include/Poco/Net/HTTPFixedLengthStream.h
@ -78,12 +78,6 @@ namespace Net
    public:
        HTTPFixedLengthInputStream(HTTPSession & session, HTTPFixedLengthStreamBuf::ContentLength length);
        ~HTTPFixedLengthInputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


@ -93,12 +87,6 @@ namespace Net
    public:
        HTTPFixedLengthOutputStream(HTTPSession & session, HTTPFixedLengthStreamBuf::ContentLength length);
        ~HTTPFixedLengthOutputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


--- a/base/poco/Net/include/Poco/Net/HTTPHeaderStream.h
+++ b/base/poco/Net/include/Poco/Net/HTTPHeaderStream.h
@ -21,7 +21,6 @@
 #include <cstddef>
 #include <istream>
 #include <ostream>
-#include "Poco/MemoryPool.h"
 #include "Poco/Net/HTTPBasicStreamBuf.h"
 #include "Poco/Net/Net.h"

@ -74,12 +73,6 @@ namespace Net
    public:
        HTTPHeaderInputStream(HTTPSession & session);
        ~HTTPHeaderInputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


@ -89,12 +82,6 @@ namespace Net
    public:
        HTTPHeaderOutputStream(HTTPSession & session);
        ~HTTPHeaderOutputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


--- a/base/poco/Net/include/Poco/Net/HTTPSession.h
+++ b/base/poco/Net/include/Poco/Net/HTTPSession.h
@ -192,7 +192,7 @@ namespace Net
        HTTPSession & operator=(const HTTPSession &);

        StreamSocket _socket;
-        char * _pBuffer;
+        std::unique_ptr<char[]> _pBuffer;
        char * _pCurrent;
        char * _pEnd;
        bool _keepAlive;
--- a/base/poco/Net/include/Poco/Net/HTTPStream.h
+++ b/base/poco/Net/include/Poco/Net/HTTPStream.h
@ -21,7 +21,6 @@
 #include <cstddef>
 #include <istream>
 #include <ostream>
-#include "Poco/MemoryPool.h"
 #include "Poco/Net/HTTPBasicStreamBuf.h"
 #include "Poco/Net/Net.h"

@ -75,12 +74,6 @@ namespace Net
    public:
        HTTPInputStream(HTTPSession & session);
        ~HTTPInputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


@ -90,12 +83,6 @@ namespace Net
    public:
        HTTPOutputStream(HTTPSession & session);
        ~HTTPOutputStream();
-
-        void * operator new(std::size_t size);
-        void operator delete(void * ptr);
-
-    private:
-        static Poco::MemoryPool _pool;
    };


--- a/base/poco/Net/src/HTTPBufferAllocator.cpp
+++ b/base/poco/Net/src/HTTPBufferAllocator.cpp
@ -1,44 +0,0 @@
-//
-// HTTPBufferAllocator.cpp
-//
-// Library: Net
-// Package: HTTP
-// Module:  HTTPBufferAllocator
-//
-// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
-// and Contributors.
-//
-// SPDX-License-Identifier:	BSL-1.0
-//
-
-
-#include "Poco/Net/HTTPBufferAllocator.h"
-
-
-using Poco::MemoryPool;
-
-
-namespace Poco {
-namespace Net {
-
-
-MemoryPool HTTPBufferAllocator::_pool(HTTPBufferAllocator::BUFFER_SIZE, 16);
-
-
-char* HTTPBufferAllocator::allocate(std::streamsize size)
-{
-	poco_assert_dbg (size == BUFFER_SIZE);
-
-	return reinterpret_cast<char*>(_pool.get());
-}
-
-
-void HTTPBufferAllocator::deallocate(char* ptr, std::streamsize size)
-{
-	poco_assert_dbg (size == BUFFER_SIZE);
-
-	_pool.release(ptr);
-}
-
-
-} } // namespace Poco::Net
--- a/base/poco/Net/src/HTTPChunkedStream.cpp
+++ b/base/poco/Net/src/HTTPChunkedStream.cpp
@ -34,7 +34,7 @@ namespace Net {


 HTTPChunkedStreamBuf::HTTPChunkedStreamBuf(HTTPSession& session, openmode mode):
-	HTTPBasicStreamBuf(HTTPBufferAllocator::BUFFER_SIZE, mode),
+	HTTPBasicStreamBuf(HTTP_DEFAULT_BUFFER_SIZE, mode),
 	_session(session),
 	_mode(mode),
 	_chunk(0)
@ -181,10 +181,6 @@ HTTPChunkedStreamBuf* HTTPChunkedIOS::rdbuf()
 // HTTPChunkedInputStream
 //

-
-Poco::MemoryPool HTTPChunkedInputStream::_pool(sizeof(HTTPChunkedInputStream));
-
-
 HTTPChunkedInputStream::HTTPChunkedInputStream(HTTPSession& session):
 	HTTPChunkedIOS(session, std::ios::in),
 	std::istream(&_buf)
@ -196,34 +192,10 @@ HTTPChunkedInputStream::~HTTPChunkedInputStream()
 {
 }

-
-void* HTTPChunkedInputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPChunkedInputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 //
 // HTTPChunkedOutputStream
 //

-
-Poco::MemoryPool HTTPChunkedOutputStream::_pool(sizeof(HTTPChunkedOutputStream));
-
-
 HTTPChunkedOutputStream::HTTPChunkedOutputStream(HTTPSession& session):
 	HTTPChunkedIOS(session, std::ios::out),
 	std::ostream(&_buf)
@ -235,24 +207,4 @@ HTTPChunkedOutputStream::~HTTPChunkedOutputStream()
 {
 }

-
-void* HTTPChunkedOutputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPChunkedOutputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 } } // namespace Poco::Net
--- a/base/poco/Net/src/HTTPFixedLengthStream.cpp
+++ b/base/poco/Net/src/HTTPFixedLengthStream.cpp
@ -30,7 +30,7 @@ namespace Net {


 HTTPFixedLengthStreamBuf::HTTPFixedLengthStreamBuf(HTTPSession& session, ContentLength length, openmode mode):
-	HTTPBasicStreamBuf(HTTPBufferAllocator::BUFFER_SIZE, mode),
+	HTTPBasicStreamBuf(HTTP_DEFAULT_BUFFER_SIZE, mode),
 	_session(session),
 	_length(length),
 	_count(0)
@ -109,9 +109,6 @@ HTTPFixedLengthStreamBuf* HTTPFixedLengthIOS::rdbuf()
 //


-Poco::MemoryPool HTTPFixedLengthInputStream::_pool(sizeof(HTTPFixedLengthInputStream));
-
-
 HTTPFixedLengthInputStream::HTTPFixedLengthInputStream(HTTPSession& session, HTTPFixedLengthStreamBuf::ContentLength length):
 	HTTPFixedLengthIOS(session, length, std::ios::in),
 	std::istream(&_buf)
@ -124,33 +121,10 @@ HTTPFixedLengthInputStream::~HTTPFixedLengthInputStream()
 }


-void* HTTPFixedLengthInputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPFixedLengthInputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 //
 // HTTPFixedLengthOutputStream
 //

-
-Poco::MemoryPool HTTPFixedLengthOutputStream::_pool(sizeof(HTTPFixedLengthOutputStream));
-
-
 HTTPFixedLengthOutputStream::HTTPFixedLengthOutputStream(HTTPSession& session, HTTPFixedLengthStreamBuf::ContentLength length):
 	HTTPFixedLengthIOS(session, length, std::ios::out),
 	std::ostream(&_buf)
@ -163,23 +137,4 @@ HTTPFixedLengthOutputStream::~HTTPFixedLengthOutputStream()
 }


-void* HTTPFixedLengthOutputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPFixedLengthOutputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 } } // namespace Poco::Net
--- a/base/poco/Net/src/HTTPHeaderStream.cpp
+++ b/base/poco/Net/src/HTTPHeaderStream.cpp
@ -26,7 +26,7 @@ namespace Net {


 HTTPHeaderStreamBuf::HTTPHeaderStreamBuf(HTTPSession& session, openmode mode):
-	HTTPBasicStreamBuf(HTTPBufferAllocator::BUFFER_SIZE, mode),
+	HTTPBasicStreamBuf(HTTP_DEFAULT_BUFFER_SIZE, mode),
 	_session(session),
 	_end(false)
 {
@ -101,10 +101,6 @@ HTTPHeaderStreamBuf* HTTPHeaderIOS::rdbuf()
 // HTTPHeaderInputStream
 //

-
-Poco::MemoryPool HTTPHeaderInputStream::_pool(sizeof(HTTPHeaderInputStream));
-
-
 HTTPHeaderInputStream::HTTPHeaderInputStream(HTTPSession& session):
 	HTTPHeaderIOS(session, std::ios::in),
 	std::istream(&_buf)
@ -116,34 +112,10 @@ HTTPHeaderInputStream::~HTTPHeaderInputStream()
 {
 }

-
-void* HTTPHeaderInputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPHeaderInputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 //
 // HTTPHeaderOutputStream
 //

-
-Poco::MemoryPool HTTPHeaderOutputStream::_pool(sizeof(HTTPHeaderOutputStream));
-
-
 HTTPHeaderOutputStream::HTTPHeaderOutputStream(HTTPSession& session):
 	HTTPHeaderIOS(session, std::ios::out),
 	std::ostream(&_buf)
@ -155,24 +127,4 @@ HTTPHeaderOutputStream::~HTTPHeaderOutputStream()
 {
 }

-
-void* HTTPHeaderOutputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPHeaderOutputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 } } // namespace Poco::Net
--- a/base/poco/Net/src/HTTPSession.cpp
+++ b/base/poco/Net/src/HTTPSession.cpp
@ -13,8 +13,8 @@


 #include "Poco/Net/HTTPSession.h"
-#include "Poco/Net/HTTPBufferAllocator.h"
 #include "Poco/Net/NetException.h"
+#include "Poco/Net/HTTPBasicStreamBuf.h"
 #include <cstring>


@ -68,14 +68,6 @@ HTTPSession::HTTPSession(const StreamSocket& socket, bool keepAlive):

 HTTPSession::~HTTPSession()
 {
-	try
-	{
-		if (_pBuffer) HTTPBufferAllocator::deallocate(_pBuffer, HTTPBufferAllocator::BUFFER_SIZE);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
 	try
 	{
 		close();
@ -177,10 +169,10 @@ void HTTPSession::refill()
 {
 	if (!_pBuffer)
 	{
-		_pBuffer = HTTPBufferAllocator::allocate(HTTPBufferAllocator::BUFFER_SIZE);
+		_pBuffer = std::make_unique<char[]>(HTTP_DEFAULT_BUFFER_SIZE);
 	}
-	_pCurrent = _pEnd = _pBuffer;
-	int n = receive(_pBuffer, HTTPBufferAllocator::BUFFER_SIZE);
+	_pCurrent = _pEnd = _pBuffer.get();
+	int n = receive(_pBuffer.get(), HTTP_DEFAULT_BUFFER_SIZE);
 	_pEnd += n;
 }

@ -199,7 +191,7 @@ void HTTPSession::connect(const SocketAddress& address)
 	_socket.setNoDelay(true);
 	// There may be leftover data from a previous (failed) request in the buffer,
 	// so we clear it.
-	_pCurrent = _pEnd = _pBuffer;
+	_pCurrent = _pEnd = _pBuffer.get();
 }


--- a/base/poco/Net/src/HTTPStream.cpp
+++ b/base/poco/Net/src/HTTPStream.cpp
@ -26,7 +26,7 @@ namespace Net {


 HTTPStreamBuf::HTTPStreamBuf(HTTPSession& session, openmode mode):
-	HTTPBasicStreamBuf(HTTPBufferAllocator::BUFFER_SIZE, mode),
+	HTTPBasicStreamBuf(HTTP_DEFAULT_BUFFER_SIZE, mode),
 	_session(session),
 	_mode(mode)
 {
@ -96,10 +96,6 @@ HTTPStreamBuf* HTTPIOS::rdbuf()
 // HTTPInputStream
 //

-
-Poco::MemoryPool HTTPInputStream::_pool(sizeof(HTTPInputStream));
-
-
 HTTPInputStream::HTTPInputStream(HTTPSession& session):
 	HTTPIOS(session, std::ios::in),
 	std::istream(&_buf)
@ -112,33 +108,11 @@ HTTPInputStream::~HTTPInputStream()
 }


-void* HTTPInputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPInputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 //
 // HTTPOutputStream
 //


-Poco::MemoryPool HTTPOutputStream::_pool(sizeof(HTTPOutputStream));
-
-
 HTTPOutputStream::HTTPOutputStream(HTTPSession& session):
 	HTTPIOS(session, std::ios::out),
 	std::ostream(&_buf)
@ -150,24 +124,4 @@ HTTPOutputStream::~HTTPOutputStream()
 {
 }

-
-void* HTTPOutputStream::operator new(std::size_t size)
-{
-	return _pool.get();
-}
-
-
-void HTTPOutputStream::operator delete(void* ptr)
-{
-	try
-	{
-		_pool.release(ptr);
-	}
-	catch (...)
-	{
-		poco_unexpected();
-	}
-}
-
-
 } } // namespace Poco::Net
--- a/contrib/libhdfs3
+++ b/contrib/libhdfs3
@ -1 +1 @@
-Subproject commit 164b89253fad7991bce77882f01b51ab81d19f3d
+Subproject commit 377220ef351ae24994a5fcd2b5fa3930d00c4db0
--- a/docker/test/style/Dockerfile
+++ b/docker/test/style/Dockerfile
@ -18,7 +18,7 @@ RUN apt-get update && env DEBIAN_FRONTEND=noninteractive apt-get install --yes \
    python3-pip \
    shellcheck \
    yamllint \
-    && pip3 install black==23.1.0 boto3 codespell==2.2.1 dohq-artifactory mypy PyGithub unidiff pylint==2.6.2 \
+    && pip3 install black==23.1.0 boto3 codespell==2.2.1 mypy==1.3.0 PyGithub unidiff pylint==2.6.2 \
    && apt-get clean \
    && rm -rf /root/.cache/pip

--- a/docs/_description_templates/template-data-type.md
+++ b/docs/_description_templates/template-data-type.md
@ -0,0 +1,29 @@
+---
+toc_priority:
+toc_title:
+---
+
+# data_type_name {#data_type-name}
+
+Description.
+
+**Parameters** (Optional)
+
+-   `x` — Description. [Type name](relative/path/to/type/dscr.md#type).
+-   `y` — Description. [Type name](relative/path/to/type/dscr.md#type).
+
+**Examples**
+
+```sql
+
+```
+
+## Additional Info {#additional-info} (Optional)
+
+The name of an additional section can be any, for example, **Usage**.
+
+**See Also** (Optional)
+
+-   [link](#)
+
+[Original article](https://clickhouse.com/docs/en/data-types/<data-type-name>/) <!--hide-->
--- a/docs/_description_templates/template-engine.md
+++ b/docs/_description_templates/template-engine.md
@ -0,0 +1,63 @@
+# EngineName {#enginename}
+
+-   What the Database/Table engine does.
+-   Relations with other engines if they exist.
+
+## Creating a Database {#creating-a-database}
+``` sql
+    CREATE DATABASE ...
+```
+or
+
+## Creating a Table {#creating-a-table}
+``` sql
+    CREATE TABLE ...
+```
+
+**Engine Parameters**
+
+**Query Clauses** (for Table engines only)
+
+## Virtual columns {#virtual-columns} (for Table engines only)
+
+List and virtual columns with description, if they exist.
+
+## Data Types Support {#data_types-support} (for Database engines only)
+
+|  EngineName           | ClickHouse                         |
+|-----------------------|------------------------------------|
+| NativeDataTypeName    | [ClickHouseDataTypeName](link#)    |
+
+
+## Specifics and recommendations {#specifics-and-recommendations}
+
+Algorithms
+Specifics of read and write processes
+Examples of tasks
+Recommendations for usage
+Specifics of data storage
+
+## Usage Example {#usage-example}
+
+The example must show usage and use cases. The following text contains the recommended parts of this section.
+
+Input table:
+
+``` text
+```
+
+Query:
+
+``` sql
+```
+
+Result:
+
+``` text
+```
+
+Follow up with any text to clarify the example.
+
+**See Also**
+
+-   [link](#)
--- a/docs/_description_templates/template-function.md
+++ b/docs/_description_templates/template-function.md
@ -0,0 +1,51 @@
+## functionName {#functionname-in-lower-case}
+
+Short description.
+
+**Syntax** (without SELECT)
+
+``` sql
+<function syntax>
+```
+
+Alias: `<alias name>`. (Optional)
+
+More text (Optional).
+
+**Arguments** (Optional)
+
+-   `x` — Description. Optional (only for optional arguments). Possible values: <values list>. Default value: <value>. [Type name](relative/path/to/type/dscr.md#type).
+-   `y` — Description. Optional (only for optional arguments). Possible values: <values list>.Default value: <value>. [Type name](relative/path/to/type/dscr.md#type).
+
+**Parameters** (Optional, only for parametric aggregate functions)
+
+-   `z` — Description. Optional (only for optional parameters). Possible values: <values list>. Default value: <value>. [Type name](relative/path/to/type/dscr.md#type).
+
+**Returned value(s)**
+
+-   Returned values list.
+
+Type: [Type name](relative/path/to/type/dscr.md#type).
+
+**Example**
+
+The example must show usage and/or a use cases. The following text contains recommended parts of an example.
+
+Input table (Optional):
+
+``` text
+```
+
+Query:
+
+``` sql
+```
+
+Result:
+
+``` text
+```
+
+**See Also** (Optional)
+
+-   [link](#)
--- a/docs/_description_templates/template-server-setting.md
+++ b/docs/_description_templates/template-server-setting.md
@ -0,0 +1,33 @@
+## server_setting_name {#server_setting_name}
+
+Description.
+
+Describe what is configured in this section of settings.
+
+Possible value: ...
+
+Default value: ...
+
+**Settings** (Optional)
+
+If the section contains several settings, list them here. Specify possible values and default values:
+
+-   setting_1 — Description.
+-   setting_2 — Description.
+
+**Example**
+
+```xml
+<server_setting_name>
+    <setting_1> ... </setting_1>
+    <setting_2> ... </setting_2>
+</server_setting_name>
+```
+
+**Additional Info** (Optional)
+
+The name of an additional section can be any, for example, **Usage**.
+
+**See Also** (Optional)
+
+-   [link](#)
--- a/docs/_description_templates/template-setting.md
+++ b/docs/_description_templates/template-setting.md
@ -0,0 +1,27 @@
+## setting_name {#setting_name}
+
+Description.
+
+For the switch setting, use the typical phrase: “Enables or disables something …”.
+
+Possible values:
+
+*For switcher setting:*
+
+-   0 — Disabled.
+-   1 — Enabled.
+
+*For another setting (typical phrases):*
+
+-   Positive integer.
+-   0 — Disabled or unlimited or something else.
+
+Default value: `value`.
+
+**Additional Info** (Optional)
+
+The name of an additional section can be any, for example, **Usage**.
+
+**See Also** (Optional)
+
+-   [link](#)
--- a/docs/_description_templates/template-statement.md
+++ b/docs/_description_templates/template-statement.md
@ -0,0 +1,24 @@
+# Statement name (for example, SHOW USER) {#statement-name-in-lower-case}
+
+Brief description of what the statement does.
+
+**Syntax**
+
+```sql
+Syntax of the statement.
+```
+
+## Other necessary sections of the description (Optional) {#anchor}
+
+Examples of descriptions with a complicated structure:
+
+- https://clickhouse.com/docs/en/sql-reference/statements/grant/
+- https://clickhouse.com/docs/en/sql-reference/statements/revoke/
+- https://clickhouse.com/docs/en/sql-reference/statements/select/join/
+
+
+**See Also** (Optional)
+
+Links to related topics as a list.
+
+-   [link](#)
--- a/docs/_description_templates/template-system-table.md
+++ b/docs/_description_templates/template-system-table.md
@ -0,0 +1,25 @@
+# system.table_name {#system-tables_table-name}
+
+Description.
+
+Columns:
+
+-   `column_name` ([data_type_name](path/to/data_type.md)) — Description.
+
+**Example**
+
+Query:
+
+``` sql
+SELECT * FROM system.table_name
+```
+
+Result:
+
+``` text
+Some output. It shouldn't be too long.
+```
+
+**See Also**
+
+-   [Article name](path/to/article_name.md) — Some words about referenced information.
--- a/docs/en/getting-started/install.md
+++ b/docs/en/getting-started/install.md
@ -378,6 +378,10 @@ request](https://github.com/ClickHouse/ClickHouse/commits/master) and find CI ch
 https://s3.amazonaws.com/clickhouse/builds/PRs/.../.../binary_aarch64_v80compat/clickhouse". You can then click the link to download the
 build.

+### macOS-only: Install with Homebrew
+
+To install ClickHouse using the popular `brew` package manager, follow the instructions listed in the [ClickHouse Homebrew tap](https://github.com/ClickHouse/homebrew-clickhouse).
+
 ## Launch {#launch}

 To start the server as a daemon, run:
--- a/docs/en/operations/system-tables/index.md
+++ b/docs/en/operations/system-tables/index.md
@ -13,6 +13,7 @@ System tables provide information about:

 - Server states, processes, and environment.
 - Server’s internal processes.
+- Options used when the ClickHouse binary was built.

 System tables:

--- a/docs/en/sql-reference/statements/show.md
+++ b/docs/en/sql-reference/statements/show.md
@ -283,7 +283,7 @@ The optional keyword `EXTENDED` currently has no effect, it only exists for MySQ

 `SHOW INDEX` produces a result table with the following structure:
 - table - The name of the table (String)
- non_unique - 0 if the index can contain duplicates, 1 otherwise (UInt8)
+- non_unique - 0 if the index cannot contain duplicates, 1 otherwise (UInt8)
 - key_name - The name of the index, `PRIMARY` if the index is a primary key index (String)
 - seq_in_index - Currently unused
 - column_name - Currently unused
--- a/rust/skim/Cargo.lock
+++ b/rust/skim/Cargo.lock
@ -14,13 +14,19 @@ dependencies = [

 [[package]]
 name = "aho-corasick"
-version = "0.7.20"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
+checksum = "43f6cb1bf222025340178f382c426f13757b2960e89779dfcb319c32542a5a41"
 dependencies = [
 "memchr",
 ]

+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@ -32,9 +38,9 @@ dependencies = [

 [[package]]
 name = "arrayvec"
-version = "0.7.2"
+version = "0.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
+checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"

 [[package]]
 name = "atty"
@ -42,7 +48,7 @@ version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.1.19",
 "libc",
 "winapi",
 ]
@ -67,15 +73,15 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"

 [[package]]
 name = "bumpalo"
-version = "3.11.1"
+version = "3.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "572f695136211188308f16ad2ca5c851a712c464060ae6974944458eb83880ba"
+checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"

 [[package]]
 name = "cc"
-version = "1.0.77"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9f73505338f7d905b19d18738976aae232eb46b8efc15554ffc56deb5d9ebe4"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"

 [[package]]
 name = "cfg-if"
@ -85,13 +91,13 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
 name = "chrono"
-version = "0.4.23"
+version = "0.4.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16b0a3d9ed01224b22057780a37bb8c5dbfe1be8ba48678e7bf57ec4b385411f"
+checksum = "ec837a71355b28f6556dbd569b37b3f363091c0bd4b2e735674521b4c5fd9bc5"
 dependencies = [
+ "android-tzdata",
 "iana-time-zone",
 "js-sys",
- "num-integer",
 "num-traits",
 "time 0.1.45",
 "wasm-bindgen",
@ -100,9 +106,9 @@ dependencies = [

 [[package]]
 name = "clap"
-version = "3.2.23"
+version = "3.2.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71655c45cb9845d3270c9d6df84ebe72b4dad3c2ba3f7023ad47c144e4e473a5"
+checksum = "4ea181bf566f71cb9a5d17a59e1871af638180a18fb0035c92ae62b705207123"
 dependencies = [
 "atty",
 "bitflags",
@ -135,9 +141,9 @@ dependencies = [

 [[package]]
 name = "core-foundation-sys"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"
+checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"

 [[package]]
 name = "crossbeam"
@ -155,9 +161,9 @@ dependencies = [

 [[package]]
 name = "crossbeam-channel"
-version = "0.5.6"
+version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2dd04ddaf88237dc3b8d8f9a3c1004b506b54b3313403944054d23c0870c521"
+checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
 dependencies = [
 "cfg-if",
 "crossbeam-utils",
@ -165,9 +171,9 @@ dependencies = [

 [[package]]
 name = "crossbeam-deque"
-version = "0.8.2"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "715e8152b692bba2d374b53d4875445368fdf21a94751410af607a5ac677d1fc"
+checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
 dependencies = [
 "cfg-if",
 "crossbeam-epoch",
@ -176,14 +182,14 @@ dependencies = [

 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.13"
+version = "0.9.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01a9af1f4c2ef74bb8aa1f7e19706bc72d03598c8a570bb5de72243c7a9d9d5a"
+checksum = "ae211234986c545741a7dc064309f67ee1e5ad243d0e48335adc0484d960bcc7"
 dependencies = [
 "autocfg",
 "cfg-if",
 "crossbeam-utils",
- "memoffset 0.7.1",
+ "memoffset 0.9.0",
 "scopeguard",
 ]

@ -199,18 +205,18 @@ dependencies = [

 [[package]]
 name = "crossbeam-utils"
-version = "0.8.14"
+version = "0.8.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fb766fa798726286dbbb842f174001dab8abc7b627a1dd86e0b7222a95d929f"
+checksum = "5a22b2d63d4d1dc0b7f1b6b2747dd0088008a9be28b6ddf0b1e7d335e3037294"
 dependencies = [
 "cfg-if",
 ]

 [[package]]
 name = "cxx"
-version = "1.0.83"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdf07d07d6531bfcdbe9b8b739b104610c6508dcc4d63b410585faf338241daf"
+checksum = "e88abab2f5abbe4c56e8f1fb431b784d710b709888f35755a160e62e33fe38e8"
 dependencies = [
 "cc",
 "cxxbridge-flags",
@ -220,9 +226,9 @@ dependencies = [

 [[package]]
 name = "cxx-build"
-version = "1.0.83"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2eb5b96ecdc99f72657332953d4d9c50135af1bac34277801cc3937906ebd39"
+checksum = "5c0c11acd0e63bae27dcd2afced407063312771212b7a823b4fd72d633be30fb"
 dependencies = [
 "cc",
 "codespan-reporting",
@ -230,31 +236,31 @@ dependencies = [
 "proc-macro2",
 "quote",
 "scratch",
- "syn",
+ "syn 2.0.23",
 ]

 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.83"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac040a39517fd1674e0f32177648334b0f4074625b5588a64519804ba0553b12"
+checksum = "8d3816ed957c008ccd4728485511e3d9aaf7db419aa321e3d2c5a2f3411e36c8"

 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.83"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1362b0ddcfc4eb0a1f57b68bd77dd99f0e826958a96abd0ae9bd092e114ffed6"
+checksum = "a26acccf6f445af85ea056362561a24ef56cdc15fcc685f03aec50b9c702cb6d"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn",
+ "syn 2.0.23",
 ]

 [[package]]
 name = "darling"
-version = "0.14.2"
+version = "0.14.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0dd3cd20dc6b5a876612a6e5accfe7f3dd883db6d07acfbf14c128f61550dfa"
+checksum = "7b750cb3417fd1b327431a470f388520309479ab0bf5e323505daf0290cd3850"
 dependencies = [
 "darling_core",
 "darling_macro",
@ -262,27 +268,27 @@ dependencies = [

 [[package]]
 name = "darling_core"
-version = "0.14.2"
+version = "0.14.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a784d2ccaf7c98501746bf0be29b2022ba41fd62a2e622af997a03e9f972859f"
+checksum = "109c1ca6e6b7f82cc233a97004ea8ed7ca123a9af07a8230878fcfda9b158bf0"
 dependencies = [
 "fnv",
 "ident_case",
 "proc-macro2",
 "quote",
 "strsim",
- "syn",
+ "syn 1.0.109",
 ]

 [[package]]
 name = "darling_macro"
-version = "0.14.2"
+version = "0.14.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7618812407e9402654622dd402b0a89dff9ba93badd6540781526117b92aab7e"
+checksum = "a4aab4dbc9f7611d8b55048a3a16d2d010c2c8334e46304b40ac1cc14bf3b48e"
 dependencies = [
 "darling_core",
 "quote",
- "syn",
+ "syn 1.0.109",
 ]

 [[package]]
@ -313,7 +319,7 @@ dependencies = [
 "darling",
 "proc-macro2",
 "quote",
- "syn",
+ "syn 1.0.109",
 ]

 [[package]]
@ -323,7 +329,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f0314b72bed045f3a68671b3c86328386762c93f82d98c65c3cb5e5f573dd68"
 dependencies = [
 "derive_builder_core",
- "syn",
+ "syn 1.0.109",
 ]

 [[package]]
@ -349,9 +355,9 @@ dependencies = [

 [[package]]
 name = "either"
-version = "1.8.0"
+version = "1.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
+checksum = "7fcaabb2fef8c910e7f4c7ce9f67a1283a1715879a7c230ca9d6d1ae31f16d91"

 [[package]]
 name = "env_logger"
@ -383,9 +389,9 @@ dependencies = [

 [[package]]
 name = "getrandom"
-version = "0.2.8"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
+checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
 dependencies = [
 "cfg-if",
 "libc",
@ -407,6 +413,12 @@ dependencies = [
 "libc",
 ]

+[[package]]
+name = "hermit-abi"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fed44880c466736ef9a5c5b5facefb5ed0785676d0c02d612db14e54f0d84286"
+
 [[package]]
 name = "humantime"
 version = "2.1.0"
@ -415,26 +427,25 @@ checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"

 [[package]]
 name = "iana-time-zone"
-version = "0.1.53"
+version = "0.1.57"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64c122667b287044802d6ce17ee2ddf13207ed924c712de9a66a5814d5b64765"
+checksum = "2fad5b825842d2b38bd206f3e81d6957625fd7f0a361e345c30e01a0ae2dd613"
 dependencies = [
 "android_system_properties",
 "core-foundation-sys",
 "iana-time-zone-haiku",
 "js-sys",
 "wasm-bindgen",
- "winapi",
+ "windows",
 ]

 [[package]]
 name = "iana-time-zone-haiku"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0703ae284fc167426161c2e3f1da3ea71d94b21bedbcc9494e92b28e334e3dca"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
 dependencies = [
- "cxx",
- "cxx-build",
+ "cc",
 ]

 [[package]]
@ -445,9 +456,9 @@ checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"

 [[package]]
 name = "indexmap"
-version = "1.9.2"
+version = "1.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
+checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
 dependencies = [
 "autocfg",
 "hashbrown",
@ -455,9 +466,9 @@ dependencies = [

 [[package]]
 name = "js-sys"
-version = "0.3.60"
+version = "0.3.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49409df3e3bf0856b916e2ceaca09ee28e6871cf7d9ce97a692cacfdb2a25a47"
+checksum = "c5f195fe497f702db0f318b07fdd68edb16955aed830df8363d837542f8f935a"
 dependencies = [
 "wasm-bindgen",
 ]
@ -470,27 +481,24 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

 [[package]]
 name = "libc"
-version = "0.2.138"
+version = "0.2.147"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db6d7e329c562c5dfab7a46a2afabc8b987ab9a4834c9d1ca04dc54c1546cef8"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"

 [[package]]
 name = "link-cplusplus"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9272ab7b96c9046fbc5bc56c06c117cb639fe2d509df0c421cad82d2915cf369"
+checksum = "ecd207c9c713c34f95a097a5b029ac2ce6010530c7b49d7fea24d977dede04f5"
 dependencies = [
 "cc",
 ]

 [[package]]
 name = "log"
-version = "0.4.17"
+version = "0.4.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
-dependencies = [
- "cfg-if",
-]
+checksum = "b06a4cde4c0f271a446782e3eff8de789548ce57dbc8eca9292c27f4a42004b4"

 [[package]]
 name = "memchr"
@ -509,9 +517,9 @@ dependencies = [

 [[package]]
 name = "memoffset"
-version = "0.7.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5de893c32cde5f383baa4c04c5d6dbdd735cfd4a794b0debdb2bb1b421da5ff4"
+checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
 dependencies = [
 "autocfg",
 ]
@ -541,16 +549,6 @@ dependencies = [
 "pin-utils",
 ]

-[[package]]
-name = "num-integer"
-version = "0.1.45"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "225d3389fb3509a24c93f5c29eb6bde2586b98d9f016636dff58d7c6f7569cd9"
-dependencies = [
- "autocfg",
- "num-traits",
-]
-
 [[package]]
 name = "num-traits"
 version = "0.2.15"
@ -562,25 +560,25 @@ dependencies = [

 [[package]]
 name = "num_cpus"
-version = "1.14.0"
+version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6058e64324c71e02bc2b150e4f3bc8286db6c83092132ffa3f6b1eab0f9def5"
+checksum = "4161fcb6d602d4d2081af7c3a45852d875a03dd337a6bfdd6e06407b61342a43"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.1",
 "libc",
 ]

 [[package]]
 name = "once_cell"
-version = "1.16.0"
+version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86f0b0d4bf799edbc74508c1e8bf170ff5f41238e5f8225603ca7caaae2b7860"
+checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"

 [[package]]
 name = "os_str_bytes"
-version = "6.4.1"
+version = "6.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b7820b9daea5457c9f21c69448905d723fbd21136ccf521748f23fd49e723ee"
+checksum = "4d5d9eb14b174ee9aa2ef96dc2b94637a2d4b6e7cb873c7e171f0c20c6cf3eac"

 [[package]]
 name = "pin-utils"
@ -590,27 +588,27 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"

 [[package]]
 name = "proc-macro2"
-version = "1.0.47"
+version = "1.0.63"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+checksum = "7b368fba921b0dce7e60f5e04ec15e565b3303972b42bcfde1d0713b881959eb"
 dependencies = [
 "unicode-ident",
 ]

 [[package]]
 name = "quote"
-version = "1.0.21"
+version = "1.0.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+checksum = "573015e8ab27661678357f27dc26460738fd2b6c86e46f386fde94cb5d913105"
 dependencies = [
 "proc-macro2",
 ]

 [[package]]
 name = "rayon"
-version = "1.6.1"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db3a213adf02b3bcfd2d3846bb41cb22857d131789e01df434fb7e7bc0759b7"
+checksum = "1d2df5196e37bcc87abebc0053e20787d73847bb33134a69841207dd0a47f03b"
 dependencies = [
 "either",
 "rayon-core",
@ -618,9 +616,9 @@ dependencies = [

 [[package]]
 name = "rayon-core"
-version = "1.10.1"
+version = "1.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cac410af5d00ab6884528b4ab69d1e8e146e8d471201800fa1b4524126de6ad3"
+checksum = "4b8f95bd6966f5c87776639160a66bd8ab9895d9d4ab01ddba9fc60661aebe8d"
 dependencies = [
 "crossbeam-channel",
 "crossbeam-deque",
@ -650,9 +648,9 @@ dependencies = [

 [[package]]
 name = "regex"
-version = "1.7.0"
+version = "1.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"
+checksum = "d0ab3ca65655bb1e41f2a8c8cd662eb4fb035e67c3f78da1d61dffe89d07300f"
 dependencies = [
 "aho-corasick",
 "memchr",
@ -661,15 +659,15 @@ dependencies = [

 [[package]]
 name = "regex-syntax"
-version = "0.6.28"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "456c603be3e8d448b072f410900c09faf164fbce2d480456f50eea6e25f9c848"
+checksum = "436b050e76ed2903236f032a59761c1eb99e1b0aead2c257922771dab1fc8c78"

 [[package]]
 name = "rustversion"
-version = "1.0.9"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97477e48b4cf8603ad5f7aaf897467cf42ab4218a38ef76fb14c2d6773a6d6a8"
+checksum = "4f3208ce4d8448b3f3e7d168a73f5e0c43a61e32930de3bceeccedb388b6bf06"

 [[package]]
 name = "scopeguard"
@ -679,15 +677,15 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"

 [[package]]
 name = "scratch"
-version = "1.0.2"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8132065adcfd6e02db789d9285a0deb2f3fcb04002865ab67d5fb103533898"
+checksum = "1792db035ce95be60c3f8853017b3999209281c24e2ba5bc8e59bf97a0c590c1"

 [[package]]
 name = "serde"
-version = "1.0.149"
+version = "1.0.164"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "256b9932320c590e707b94576e3cc1f7c9024d0ee6612dfbcf1cb106cbe8e055"
+checksum = "9e8c8cf938e98f769bc164923b06dce91cea1751522f46f8466461af04c9027d"

 [[package]]
 name = "shlex"
@ -697,9 +695,9 @@ checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"

 [[package]]
 name = "skim"
-version = "0.10.2"
+version = "0.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cebed5f897cd6c0d80fbe30adb36c0abf7400e93043a63ae56458495642b3485"
+checksum = "e5d28de0a6cb2cdd83a076f1de9d965b973ae08b244df1aa70b432946dda0f32"
 dependencies = [
 "atty",
 "beef",
@ -717,7 +715,7 @@ dependencies = [
 "rayon",
 "regex",
 "shlex",
- "time 0.3.17",
+ "time 0.3.22",
 "timer",
 "tuikit",
 "unicode-width",
@ -732,9 +730,20 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"

 [[package]]
 name = "syn"
-version = "1.0.105"
+version = "1.0.109"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59fb7d6d8281a51045d62b8eb3a7d1ce347b76f312af50cd3dc0af39c87c1737"
 dependencies = [
 "proc-macro2",
 "quote",
@ -754,9 +763,9 @@ dependencies = [

 [[package]]
 name = "termcolor"
-version = "1.1.3"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
+checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
 dependencies = [
 "winapi-util",
 ]
@ -769,30 +778,31 @@ checksum = "222a222a5bfe1bba4a77b45ec488a741b3cb8872e5e499451fd7d0129c9c7c3d"

 [[package]]
 name = "thiserror"
-version = "1.0.37"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10deb33631e3c9018b9baf9dcbbc4f737320d2b576bac10f6aefa048fa407e3e"
+checksum = "978c9a314bd8dc99be594bc3c175faaa9794be04a5a5e153caba6915336cebac"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.37"
+version = "1.0.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "982d17546b47146b28f7c22e3d08465f6b8903d0ea13c1660d9d84a6e7adcdbb"
+checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn",
+ "syn 2.0.23",
 ]

 [[package]]
 name = "thread_local"
-version = "1.1.4"
+version = "1.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5516c27b78311c50bf42c071425c560ac799b11c30b31f87e3081965fe5e0180"
+checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
 dependencies = [
+ "cfg-if",
 "once_cell",
 ]

@ -809,9 +819,9 @@ dependencies = [

 [[package]]
 name = "time"
-version = "0.3.17"
+version = "0.3.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a561bf4617eebd33bca6434b988f39ed798e527f51a1e797d0ee4f61c0a38376"
+checksum = "ea9e1b3cf1243ae005d9e74085d4d542f3125458f3a81af210d901dcd7411efd"
 dependencies = [
 "serde",
 "time-core",
@ -819,9 +829,9 @@ dependencies = [

 [[package]]
 name = "time-core"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e153e1f1acaef8acc537e68b44906d2db6436e2b35ac2c6b42640fff91f00fd"
+checksum = "7300fbefb4dadc1af235a9cef3737cea692a9d97e1b9cbcd4ebdae6f8868e6fb"

 [[package]]
 name = "timer"
@ -848,9 +858,9 @@ dependencies = [

 [[package]]
 name = "unicode-ident"
-version = "1.0.5"
+version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+checksum = "b15811caf2415fb889178633e7724bad2509101cde276048e013b9def5e51fa0"

 [[package]]
 name = "unicode-width"
@ -860,15 +870,15 @@ checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"

 [[package]]
 name = "utf8parse"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "936e4b492acfd135421d8dca4b1aa80a7bfc26e702ef3af710e0752684df5372"
+checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"

 [[package]]
 name = "vte"
-version = "0.11.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1aae21c12ad2ec2d168c236f369c38ff332bc1134f7246350dca641437365045"
+checksum = "f5022b5fbf9407086c180e9557be968742d839e68346af7792b8592489732197"
 dependencies = [
 "arrayvec",
 "utf8parse",
@ -899,9 +909,9 @@ checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"

 [[package]]
 name = "wasm-bindgen"
-version = "0.2.83"
+version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eaf9f5aceeec8be17c128b2e93e031fb8a4d469bb9c4ae2d7dc1888b26887268"
+checksum = "7706a72ab36d8cb1f80ffbf0e071533974a60d0a308d01a5d0375bf60499a342"
 dependencies = [
 "cfg-if",
 "wasm-bindgen-macro",
@ -909,24 +919,24 @@ dependencies = [

 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.83"
+version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c8ffb332579b0557b52d268b91feab8df3615f265d5270fec2a8c95b17c1142"
+checksum = "5ef2b6d3c510e9625e5fe6f509ab07d66a760f0885d858736483c32ed7809abd"
 dependencies = [
 "bumpalo",
 "log",
 "once_cell",
 "proc-macro2",
 "quote",
- "syn",
+ "syn 2.0.23",
 "wasm-bindgen-shared",
 ]

 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.83"
+version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "052be0f94026e6cbc75cdefc9bae13fd6052cdcaf532fa6c45e7ae33a1e6c810"
+checksum = "dee495e55982a3bd48105a7b947fd2a9b4a8ae3010041b9e0faab3f9cd028f1d"
 dependencies = [
 "quote",
 "wasm-bindgen-macro-support",
@ -934,22 +944,22 @@ dependencies = [

 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.83"
+version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07bc0c051dc5f23e307b13285f9d75df86bfdf816c5721e573dec1f9b8aa193c"
+checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn",
+ "syn 2.0.23",
 "wasm-bindgen-backend",
 "wasm-bindgen-shared",
 ]

 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.83"
+version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c38c045535d93ec4f0b4defec448e4291638ee608530863b1e2ba115d4fff7f"
+checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"

 [[package]]
 name = "winapi"
@ -981,3 +991,69 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05d4b17490f70499f20b9e791dcf6a299785ce8af4d709018206dc5b4953e95f"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
--- a/src/Access/ContextAccess.cpp
+++ b/src/Access/ContextAccess.cpp
@ -228,6 +228,12 @@ ContextAccess::ContextAccess(const AccessControl & access_control_, const Params
 }


+ContextAccess::ContextAccess(FullAccess)
+    : is_full_access(true), access(std::make_shared<AccessRights>(AccessRights::getFullAccess())), access_with_implicit(access)
+{
+}
+
+
 ContextAccess::~ContextAccess()
 {
    enabled_settings.reset();
@ -413,14 +419,8 @@ std::optional<QuotaUsage> ContextAccess::getQuotaUsage() const

 std::shared_ptr<const ContextAccess> ContextAccess::getFullAccess()
 {
-    static const std::shared_ptr<const ContextAccess> res = []
-    {
-        auto full_access = std::make_shared<ContextAccess>();
-        full_access->is_full_access = true;
-        full_access->access = std::make_shared<AccessRights>(AccessRights::getFullAccess());
-        full_access->access_with_implicit = full_access->access;
-        return full_access;
-    }();
+    static const std::shared_ptr<const ContextAccess> res =
+        [] { return std::shared_ptr<ContextAccess>(new ContextAccess{kFullAccess}); }();
    return res;
 }

--- a/src/Access/ContextAccess.h
+++ b/src/Access/ContextAccess.h
@ -69,7 +69,6 @@ public:
    using Params = ContextAccessParams;
    const Params & getParams() const { return params; }

-    ContextAccess() { } /// NOLINT
    ContextAccess(const AccessControl & access_control_, const Params & params_);

    /// Returns the current user. Throws if user is nullptr.
@ -171,10 +170,17 @@ public:
 private:
    friend class AccessControl;

+    struct FullAccess {};
+    static const FullAccess kFullAccess;
+
+    /// Makes an instance of ContextAccess which provides full access to everything
+    /// without any limitations. This is used for the global context.
+    explicit ContextAccess(FullAccess);
+
    void initialize();
-    void setUser(const UserPtr & user_) const;
-    void setRolesInfo(const std::shared_ptr<const EnabledRolesInfo> & roles_info_) const;
-    void calculateAccessRights() const;
+    void setUser(const UserPtr & user_) const TSA_REQUIRES(mutex);
+    void setRolesInfo(const std::shared_ptr<const EnabledRolesInfo> & roles_info_) const TSA_REQUIRES(mutex);
+    void calculateAccessRights() const TSA_REQUIRES(mutex);

    template <bool throw_if_denied, bool grant_option>
    bool checkAccessImpl(const AccessFlags & flags) const;
@ -217,20 +223,23 @@ private:

    const AccessControl * access_control = nullptr;
    const Params params;
-    bool is_full_access = false;
-    mutable Poco::Logger * trace_log = nullptr;
-    mutable UserPtr user;
-    mutable String user_name;
-    mutable bool user_was_dropped = false;
-    mutable scope_guard subscription_for_user_change;
-    mutable std::shared_ptr<const EnabledRoles> enabled_roles;
-    mutable scope_guard subscription_for_roles_changes;
-    mutable std::shared_ptr<const EnabledRolesInfo> roles_info;
-    mutable std::shared_ptr<const AccessRights> access;
-    mutable std::shared_ptr<const AccessRights> access_with_implicit;
-    mutable std::shared_ptr<const EnabledRowPolicies> enabled_row_policies;
-    mutable std::shared_ptr<const EnabledQuota> enabled_quota;
-    mutable std::shared_ptr<const EnabledSettings> enabled_settings;
+    const bool is_full_access = false;
+
+    mutable std::atomic<bool> user_was_dropped = false;
+    mutable std::atomic<Poco::Logger *> trace_log = nullptr;
+
+    mutable UserPtr user TSA_GUARDED_BY(mutex);
+    mutable String user_name TSA_GUARDED_BY(mutex);
+    mutable scope_guard subscription_for_user_change TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const EnabledRoles> enabled_roles TSA_GUARDED_BY(mutex);
+    mutable scope_guard subscription_for_roles_changes TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const EnabledRolesInfo> roles_info TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const AccessRights> access TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const AccessRights> access_with_implicit TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const EnabledRowPolicies> enabled_row_policies TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const EnabledQuota> enabled_quota TSA_GUARDED_BY(mutex);
+    mutable std::shared_ptr<const EnabledSettings> enabled_settings TSA_GUARDED_BY(mutex);
+
    mutable std::mutex mutex;
 };

--- a/src/Common/CurrentMetrics.cpp
+++ b/src/Common/CurrentMetrics.cpp
@ -188,6 +188,7 @@
    M(CacheDetachedFileSegments, "Number of existing detached cache file segments") \
    M(FilesystemCacheSize, "Filesystem cache size in bytes") \
    M(FilesystemCacheElements, "Filesystem cache elements (file segments)") \
+    M(FilesystemCacheDownloadQueueElements, "Filesystem cache elements in download queue") \
    M(AsyncInsertCacheSize, "Number of async insert hash id in cache") \
    M(S3Requests, "S3 requests") \
    M(KeeperAliveConnections, "Number of alive connections") \
--- a/src/Common/ThreadStatus.cpp
+++ b/src/Common/ThreadStatus.cpp
@ -67,8 +67,8 @@ ThreadGroup::ThreadGroup()
    : master_thread_id(CurrentThread::get().thread_id)
 {}

-ThreadStatus::ThreadStatus()
-    : thread_id{getThreadId()}
+ThreadStatus::ThreadStatus(bool check_current_thread_on_destruction_)
+    : thread_id{getThreadId()}, check_current_thread_on_destruction(check_current_thread_on_destruction_)
 {
    last_rusage = std::make_unique<RUsageCounters>();

@ -201,8 +201,11 @@ ThreadStatus::~ThreadStatus()

    /// Only change current_thread if it's currently being used by this ThreadStatus
    /// For example, PushingToViews chain creates and deletes ThreadStatus instances while running in the main query thread
-    if (current_thread == this)
+    if (check_current_thread_on_destruction)
+    {
+        assert(current_thread == this);
        current_thread = nullptr;
+    }
 }

 void ThreadStatus::updatePerformanceCounters()
--- a/src/Common/ThreadStatus.h
+++ b/src/Common/ThreadStatus.h
@ -224,8 +224,10 @@ private:

    Poco::Logger * log = nullptr;

+    bool check_current_thread_on_destruction;
+
 public:
-    ThreadStatus();
+    explicit ThreadStatus(bool check_current_thread_on_destruction_ = true);
    ~ThreadStatus();

    ThreadGroupPtr getThreadGroup() const;
--- a/src/Common/getHashOfLoadedBinary.cpp
+++ b/src/Common/getHashOfLoadedBinary.cpp
@ -37,7 +37,7 @@ SipHash getHashOfLoadedBinary()
 std::string getHashOfLoadedBinaryHex()
 {
    SipHash hash = getHashOfLoadedBinary();
-    std::array<UInt64, 2> checksum;
+    UInt128 checksum;
    hash.get128(checksum);
    return getHexUIntUppercase(checksum);
 }
--- a/src/Compression/CompressedReadBufferBase.cpp
+++ b/src/Compression/CompressedReadBufferBase.cpp
@ -49,8 +49,8 @@ static void validateChecksum(char * data, size_t size, const Checksum expected_c

    /// TODO mess up of endianness in error message.
    message << "Checksum doesn't match: corrupted data."
-        " Reference: " + getHexUIntLowercase(expected_checksum.high64) + getHexUIntLowercase(expected_checksum.low64)
-        + ". Actual: " + getHexUIntLowercase(calculated_checksum.high64) + getHexUIntLowercase(calculated_checksum.low64)
+        " Reference: " + getHexUIntLowercase(expected_checksum)
+        + ". Actual: " + getHexUIntLowercase(calculated_checksum)
        + ". Size of compressed block: " + toString(size);

    const char * message_hardware_failure = "This is most likely due to hardware failure. "
--- a/src/Core/SettingsQuirks.cpp
+++ b/src/Core/SettingsQuirks.cpp
@ -1,10 +1,11 @@
+#include <base/defines.h>
 #include <Core/SettingsQuirks.h>
 #include <Core/Settings.h>
 #include <Poco/Environment.h>
 #include <Poco/Platform.h>
 #include <Common/VersionNumber.h>
 #include <Common/logger_useful.h>
-#include <cstdlib>
+

 namespace
 {
@ -71,6 +72,12 @@ void applySettingsQuirks(Settings & settings, Poco::Logger * log)
        }
    }

+#if defined(THREAD_SANITIZER)
+    settings.use_hedged_requests.value = false;
+    if (log)
+        LOG_WARNING(log, "use_hedged_requests has been disabled for the build with Thread Sanitizer, because they are using fibers, leading to a failed assertion inside TSan");
+#endif
+
    if (!queryProfilerWorks())
    {
        if (settings.query_profiler_real_time_period_ns)
--- a/src/Disks/IO/CachedOnDiskReadBufferFromFile.cpp
+++ b/src/Disks/IO/CachedOnDiskReadBufferFromFile.cpp
@ -74,19 +74,22 @@ CachedOnDiskReadBufferFromFile::CachedOnDiskReadBufferFromFile(
 }

 void CachedOnDiskReadBufferFromFile::appendFilesystemCacheLog(
-    const FileSegment::Range & file_segment_range, CachedOnDiskReadBufferFromFile::ReadType type)
+    const FileSegment & file_segment, CachedOnDiskReadBufferFromFile::ReadType type)
 {
    if (!cache_log)
        return;

+    const auto range = file_segment.range();
    FilesystemCacheLogElement elem
    {
        .event_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now()),
        .query_id = query_id,
        .source_file_path = source_file_path,
-        .file_segment_range = { file_segment_range.left, file_segment_range.right },
+        .file_segment_range = { range.left, range.right },
        .requested_range = { first_offset, read_until_position },
-        .file_segment_size = file_segment_range.size(),
+        .file_segment_key = file_segment.key().toString(),
+        .file_segment_offset = file_segment.offset(),
+        .file_segment_size = range.size(),
        .read_from_cache_attempted = true,
        .read_buffer_id = current_buffer_id,
        .profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(
@ -495,7 +498,7 @@ bool CachedOnDiskReadBufferFromFile::completeFileSegmentAndGetNext()
    auto completed_range = current_file_segment->range();

    if (cache_log)
-        appendFilesystemCacheLog(completed_range, read_type);
+        appendFilesystemCacheLog(*current_file_segment, read_type);

    chassert(file_offset_of_buffer_end > completed_range.right);

@ -518,7 +521,7 @@ CachedOnDiskReadBufferFromFile::~CachedOnDiskReadBufferFromFile()
 {
    if (cache_log && file_segments && !file_segments->empty())
    {
-        appendFilesystemCacheLog(file_segments->front().range(), read_type);
+        appendFilesystemCacheLog(file_segments->front(), read_type);
    }
 }

--- a/src/Disks/IO/CachedOnDiskReadBufferFromFile.h
+++ b/src/Disks/IO/CachedOnDiskReadBufferFromFile.h
@ -90,7 +90,7 @@ private:

    bool completeFileSegmentAndGetNext();

-    void appendFilesystemCacheLog(const FileSegment::Range & file_segment_range, ReadType read_type);
+    void appendFilesystemCacheLog(const FileSegment & file_segment, ReadType read_type);

    bool writeCache(char * data, size_t size, size_t offset, FileSegment & file_segment);

--- a/src/Disks/IO/ReadBufferFromRemoteFSGather.cpp
+++ b/src/Disks/IO/ReadBufferFromRemoteFSGather.cpp
@ -90,6 +90,8 @@ void ReadBufferFromRemoteFSGather::appendUncachedReadInfo()
        .source_file_path = current_object.remote_path,
        .file_segment_range = { 0, current_object.bytes_size },
        .cache_type = FilesystemCacheLogElement::CacheType::READ_FROM_FS_BYPASSING_CACHE,
+        .file_segment_key = {},
+        .file_segment_offset = {},
        .file_segment_size = current_object.bytes_size,
        .read_from_cache_attempted = false,
    };
--- a/src/Interpreters/Cache/FileCache.cpp
+++ b/src/Interpreters/Cache/FileCache.cpp
@ -11,6 +11,7 @@
 #include <base/hex.h>
 #include <pcg-random/pcg_random.hpp>
 #include <Common/randomSeed.h>
+#include <Common/ThreadPool.h>
 #include <Common/ElapsedTimeProfileEventIncrement.h>

 #include <filesystem>
@ -54,9 +55,10 @@ FileCache::FileCache(const FileCacheSettings & settings)
    : max_file_segment_size(settings.max_file_segment_size)
    , bypass_cache_threshold(settings.enable_bypass_cache_with_threashold ? settings.bypass_cache_threashold : 0)
    , delayed_cleanup_interval_ms(settings.delayed_cleanup_interval_ms)
+    , boundary_alignment(settings.boundary_alignment)
+    , background_download_threads(settings.background_download_threads)
    , log(&Poco::Logger::get("FileCache"))
    , metadata(settings.base_path)
-    , boundary_alignment(settings.boundary_alignment)
 {
    main_priority = std::make_unique<LRUFileCachePriority>(settings.max_size, settings.max_elements);

@ -129,6 +131,9 @@ void FileCache::initialize()

    is_initialized = true;

+    for (size_t i = 0; i < background_download_threads; ++i)
+         download_threads.emplace_back([this] { metadata.downloadThreadFunc(); });
+
    cleanup_task = Context::getGlobalContextInstance()->getSchedulePool().createTask("FileCacheCleanup", [this]{ cleanupThreadFunc(); });
    cleanup_task->activate();
    cleanup_task->scheduleAfter(delayed_cleanup_interval_ms);
@ -423,7 +428,12 @@ FileSegmentsHolderPtr FileCache::set(
 }

 FileSegmentsHolderPtr
-FileCache::getOrSet(const Key & key, size_t offset, size_t size, size_t file_size, const CreateFileSegmentSettings & settings)
+FileCache::getOrSet(
+    const Key & key,
+    size_t offset,
+    size_t size,
+    size_t file_size,
+    const CreateFileSegmentSettings & settings)
 {
    ProfileEventTimeIncrement<Microseconds> watch(ProfileEvents::FilesystemCacheGetOrSetMicroseconds);

@ -645,27 +655,14 @@ bool FileCache::tryReserve(FileSegment & file_segment, const size_t size)

        if (segment_metadata->releasable())
        {
-            auto segment = segment_metadata->file_segment;
-            if (segment->state() == FileSegment::State::DOWNLOADED)
-            {
-                const auto & key = segment->key();
+            const auto & key = segment_metadata->file_segment->key();
+            auto it = to_delete.find(key);
+            if (it == to_delete.end())
+                it = to_delete.emplace(key, locked_key.getKeyMetadata()).first;
+            it->second.add(segment_metadata);

-                auto it = to_delete.find(key);
-                if (it == to_delete.end())
-                    it = to_delete.emplace(key, locked_key.getKeyMetadata()).first;
-                it->second.add(segment_metadata);
-
-                freeable_space += segment_metadata->size();
-                ++freeable_count;
-
-                return PriorityIterationResult::CONTINUE;
-            }
-
-            ProfileEvents::increment(ProfileEvents::FilesystemCacheEvictedFileSegments);
-            ProfileEvents::increment(ProfileEvents::FilesystemCacheEvictedBytes, segment->getDownloadedSize(false));
-
-            locked_key.removeFileSegment(segment->offset(), segment->lock());
-            return PriorityIterationResult::REMOVE_AND_CONTINUE;
+            freeable_space += segment_metadata->size();
+            ++freeable_count;
        }
        return PriorityIterationResult::CONTINUE;
    };
@ -809,6 +806,13 @@ bool FileCache::tryReserve(FileSegment & file_segment, const size_t size)
    return true;
 }

+void FileCache::removeKey(const Key & key)
+{
+    assertInitialized();
+    auto locked_key = metadata.lockKeyMetadata(key, CacheMetadata::KeyNotFoundPolicy::THROW);
+    locked_key->removeAll();
+}
+
 void FileCache::removeKeyIfExists(const Key & key)
 {
    assertInitialized();
@ -821,7 +825,14 @@ void FileCache::removeKeyIfExists(const Key & key)
    /// But if we have multiple replicated zero-copy tables on the same server
    /// it became possible to start removing something from cache when it is used
    /// by other "zero-copy" tables. That is why it's not an error.
-    locked_key->removeAllReleasable();
+    locked_key->removeAll(/* if_releasable */true);
+}
+
+void FileCache::removeFileSegment(const Key & key, size_t offset)
+{
+    assertInitialized();
+    auto locked_key = metadata.lockKeyMetadata(key, CacheMetadata::KeyNotFoundPolicy::THROW);
+    locked_key->removeFileSegment(offset);
 }

 void FileCache::removePathIfExists(const String & path)
@ -833,22 +844,12 @@ void FileCache::removeAllReleasable()
 {
    assertInitialized();

-    auto lock = lockCache();
-
-    main_priority->iterate([&](LockedKey & locked_key, const FileSegmentMetadataPtr & segment_metadata)
-    {
-        if (segment_metadata->releasable())
-        {
-            auto file_segment = segment_metadata->file_segment;
-            locked_key.removeFileSegment(file_segment->offset(), file_segment->lock());
-            return PriorityIterationResult::REMOVE_AND_CONTINUE;
-        }
-        return PriorityIterationResult::CONTINUE;
-    }, lock);
+    metadata.iterate([](LockedKey & locked_key) { locked_key.removeAll(/* if_releasable */true); });

    if (stash)
    {
        /// Remove all access information.
+        auto lock = lockCache();
        stash->records.clear();
        stash->queue->removeAll(lock);
    }
@ -918,7 +919,7 @@ void FileCache::loadMetadata()
                continue;
            }

-            const auto key = Key(unhexUInt<UInt128>(key_directory.filename().string().data()));
+            const auto key = Key::fromKeyString(key_directory.filename().string());
            auto locked_key = metadata.lockKeyMetadata(key, CacheMetadata::KeyNotFoundPolicy::CREATE_EMPTY, /* is_initial_load */true);

            for (fs::directory_iterator offset_it{key_directory}; offset_it != fs::directory_iterator(); ++offset_it)
@ -1027,6 +1028,11 @@ void FileCache::deactivateBackgroundOperations()
 {
    if (cleanup_task)
        cleanup_task->deactivate();
+
+    metadata.cancelDownload();
+    for (auto & thread : download_threads)
+        if (thread.joinable())
+            thread.join();
 }

 void FileCache::cleanup()
@ -1038,10 +1044,6 @@ void FileCache::cleanupThreadFunc()
 {
    try
    {
-#ifdef ABORT_ON_LOGICAL_ERROR
-        assertCacheCorrectness();
-#endif
-
        cleanup();
    }
    catch (...)
@ -1072,7 +1074,7 @@ FileSegmentsHolderPtr FileCache::getSnapshot()
 FileSegmentsHolderPtr FileCache::getSnapshot(const Key & key)
 {
    FileSegments file_segments;
-    auto locked_key = metadata.lockKeyMetadata(key, CacheMetadata::KeyNotFoundPolicy::THROW);
+    auto locked_key = metadata.lockKeyMetadata(key, CacheMetadata::KeyNotFoundPolicy::THROW_LOGICAL);
    for (const auto & [_, file_segment_metadata] : *locked_key->getKeyMetadata())
        file_segments.push_back(FileSegment::getSnapshot(file_segment_metadata->file_segment));
    return std::make_unique<FileSegmentsHolder>(std::move(file_segments));
--- a/src/Interpreters/Cache/FileCache.h
+++ b/src/Interpreters/Cache/FileCache.h
@ -83,13 +83,19 @@ public:

    FileSegmentsHolderPtr set(const Key & key, size_t offset, size_t size, const CreateFileSegmentSettings & settings);

-    /// Remove files by `key`. Removes files which might be used at the moment.
+    /// Remove file segment by `key` and `offset`. Throws if file segment does not exist.
+    void removeFileSegment(const Key & key, size_t offset);
+
+    /// Remove files by `key`. Throws if key does not exist.
+    void removeKey(const Key & key);
+
+    /// Remove files by `key`.
    void removeKeyIfExists(const Key & key);

-    /// Removes files by `path`. Removes files which might be used at the moment.
+    /// Removes files by `path`.
    void removePathIfExists(const String & path);

-    /// Remove files by `key`. Will not remove files which are used at the moment.
+    /// Remove files by `key`.
    void removeAllReleasable();

    std::vector<String> tryGetCachePaths(const Key & key);
@ -136,6 +142,8 @@ private:
    const size_t max_file_segment_size;
    const size_t bypass_cache_threshold = 0;
    const size_t delayed_cleanup_interval_ms;
+    const size_t boundary_alignment;
+    const size_t background_download_threads;

    Poco::Logger * log;

@ -180,9 +188,9 @@ private:
     */
    BackgroundSchedulePool::TaskHolder cleanup_task;

-    void assertInitialized() const;
+    std::vector<ThreadFromGlobalPool> download_threads;

-    size_t boundary_alignment;
+    void assertInitialized() const;

    void assertCacheCorrectness();

--- a/src/Interpreters/Cache/FileCacheKey.cpp
+++ b/src/Interpreters/Cache/FileCacheKey.cpp
@ -28,4 +28,9 @@ FileCacheKey FileCacheKey::random()
    return FileCacheKey(UUIDHelpers::generateV4().toUnderType());
 }

+FileCacheKey FileCacheKey::fromKeyString(const std::string & key_str)
+{
+    return FileCacheKey(unhexUInt<UInt128>(key_str.data()));
+}
+
 }
--- a/src/Interpreters/Cache/FileCacheKey.h
+++ b/src/Interpreters/Cache/FileCacheKey.h
@ -21,6 +21,8 @@ struct FileCacheKey
    static FileCacheKey random();

    bool operator==(const FileCacheKey & other) const { return key == other.key; }
+
+    static FileCacheKey fromKeyString(const std::string & key_str);
 };

 using FileCacheKeyAndOffset = std::pair<FileCacheKey, size_t>;
--- a/src/Interpreters/Cache/FileCacheSettings.cpp
+++ b/src/Interpreters/Cache/FileCacheSettings.cpp
@ -31,10 +31,9 @@ void FileCacheSettings::loadFromConfig(const Poco::Util::AbstractConfiguration &
        throw Exception(ErrorCodes::BAD_ARGUMENTS, "Disk Cache requires non-empty `path` field (cache base path) in config");

    max_elements = config.getUInt64(config_prefix + ".max_elements", FILECACHE_DEFAULT_MAX_ELEMENTS);
+
    if (config.has(config_prefix + ".max_file_segment_size"))
        max_file_segment_size = parseWithSizeSuffix<uint64_t>(config.getString(config_prefix + ".max_file_segment_size"));
-    else
-        max_file_segment_size = FILECACHE_DEFAULT_MAX_FILE_SEGMENT_SIZE;

    cache_on_write_operations = config.getUInt64(config_prefix + ".cache_on_write_operations", false);
    enable_filesystem_query_cache_limit = config.getUInt64(config_prefix + ".enable_filesystem_query_cache_limit", false);
@ -44,10 +43,12 @@ void FileCacheSettings::loadFromConfig(const Poco::Util::AbstractConfiguration &

    if (config.has(config_prefix + ".bypass_cache_threashold"))
        bypass_cache_threashold = parseWithSizeSuffix<uint64_t>(config.getString(config_prefix + ".bypass_cache_threashold"));
-    else
-         bypass_cache_threashold = FILECACHE_BYPASS_THRESHOLD;

-    boundary_alignment = config.getUInt64(config_prefix + ".boundary_alignment", DBMS_DEFAULT_BUFFER_SIZE);
+    if (config.has(config_prefix + ".boundary_alignment"))
+        boundary_alignment = parseWithSizeSuffix<uint64_t>(config.getString(config_prefix + ".boundary_alignment"));
+
+    if (config.has(config_prefix + ".background_download_threads"))
+        background_download_threads = config.getUInt(config_prefix + ".background_download_threads");

    delayed_cleanup_interval_ms = config.getUInt64(config_prefix + ".delayed_cleanup_interval_ms", FILECACHE_DELAYED_CLEANUP_INTERVAL_MS);
 }
--- a/src/Interpreters/Cache/FileCacheSettings.h
+++ b/src/Interpreters/Cache/FileCacheSettings.h
@ -26,7 +26,8 @@ struct FileCacheSettings
    size_t bypass_cache_threashold = FILECACHE_BYPASS_THRESHOLD;
    size_t delayed_cleanup_interval_ms = FILECACHE_DELAYED_CLEANUP_INTERVAL_MS;

-    size_t boundary_alignment = DBMS_DEFAULT_BUFFER_SIZE;
+    size_t boundary_alignment = FILECACHE_DEFAULT_FILE_SEGMENT_ALIGNMENT;
+    size_t background_download_threads = FILECACHE_DEFAULT_BACKGROUND_DOWNLOAD_THREADS;

    void loadFromConfig(const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix);
 };
--- a/src/Interpreters/Cache/FileCache_fwd.h
+++ b/src/Interpreters/Cache/FileCache_fwd.h
@ -4,7 +4,9 @@
 namespace DB
 {

-static constexpr int FILECACHE_DEFAULT_MAX_FILE_SEGMENT_SIZE = 8 * 1024 * 1024;
+static constexpr int FILECACHE_DEFAULT_MAX_FILE_SEGMENT_SIZE = 32 * 1024 * 1024; /// 32Mi
+static constexpr int FILECACHE_DEFAULT_FILE_SEGMENT_ALIGNMENT = 4 * 1024 * 1024; /// 4Mi
+static constexpr int FILECACHE_DEFAULT_BACKGROUND_DOWNLOAD_THREADS = 2;
 static constexpr int FILECACHE_DEFAULT_MAX_ELEMENTS = 10000000;
 static constexpr int FILECACHE_DEFAULT_HITS_THRESHOLD = 0;
 static constexpr size_t FILECACHE_BYPASS_THRESHOLD = 256 * 1024 * 1024;
--- a/src/Interpreters/Cache/FileSegment.cpp
+++ b/src/Interpreters/Cache/FileSegment.cpp
@ -237,8 +237,10 @@ void FileSegment::resetDownloadingStateUnlocked(const FileSegmentGuard::Lock & l
    /// range().size() can equal 0 in case of write-though cache.
    if (!is_unbound && current_downloaded_size != 0 && current_downloaded_size == range().size())
        setDownloadedUnlocked(lock);
-    else
+    else if (current_downloaded_size)
        setDownloadState(State::PARTIALLY_DOWNLOADED, lock);
+    else
+        setDownloadState(State::EMPTY, lock);
 }

 void FileSegment::resetDownloader()
@ -303,22 +305,13 @@ void FileSegment::resetRemoteFileReader()

 FileSegment::RemoteFileReaderPtr FileSegment::extractRemoteFileReader()
 {
-    auto locked_key = lockKeyMetadata(false);
-    if (!locked_key)
+    auto lock = lockFileSegment();
+    if (remote_file_reader && (download_state == State::DOWNLOADED
+        || download_state == State::PARTIALLY_DOWNLOADED_NO_CONTINUATION))
    {
-        assert(isDetached());
        return std::move(remote_file_reader);
    }
-
-    auto segment_lock = lockFileSegment();
-
-    assert(download_state != State::DETACHED);
-
-    bool is_last_holder = locked_key->isLastOwnerOfFileSegment(offset());
-    if (!downloader_id.empty() || !is_last_holder)
-        return nullptr;
-
-    return std::move(remote_file_reader);
+    return nullptr;
 }

 void FileSegment::setRemoteFileReader(RemoteFileReaderPtr remote_file_reader_)
@ -635,16 +628,6 @@ void FileSegment::complete()
        resetDownloaderUnlocked(segment_lock);
    }

-    if (is_downloader || is_last_holder)
-    {
-        if (cache_writer)
-        {
-            cache_writer->finalize();
-            cache_writer.reset();
-        }
-        remote_file_reader.reset();
-    }
-
    if (segment_kind == FileSegmentKind::Temporary && is_last_holder)
    {
        LOG_TEST(log, "Removing temporary file segment: {}", getInfoForLogUnlocked(segment_lock));
@ -659,6 +642,7 @@ void FileSegment::complete()
            chassert(current_downloaded_size == range().size());
            chassert(current_downloaded_size == fs::file_size(getPathInLocalCache()));
            chassert(!cache_writer);
+            chassert(!remote_file_reader);
            break;
        }
        case State::DOWNLOADING:
@ -667,7 +651,33 @@ void FileSegment::complete()
            break;
        }
        case State::EMPTY:
+        {
+            if (is_last_holder)
+                locked_key->removeFileSegment(offset(), segment_lock);
+            break;
+        }
        case State::PARTIALLY_DOWNLOADED:
+        {
+            chassert(current_downloaded_size > 0);
+
+            if (is_last_holder)
+            {
+                if (remote_file_reader)
+                {
+                    LOG_TEST(
+                        log, "Submitting file segment for background download "
+                        "(having {}/{})", downloaded_size, range().size());
+
+                    locked_key->addToDownloadQueue(offset(), segment_lock); /// Finish download in background.
+                }
+                else
+                {
+                    locked_key->shrinkFileSegmentToDownloadedSize(offset(), segment_lock);
+                    setDetachedState(segment_lock); /// See comment below.
+                }
+            }
+            break;
+        }
        case State::PARTIALLY_DOWNLOADED_NO_CONTINUATION:
        {
            chassert(current_downloaded_size != range().size());
@ -676,7 +686,6 @@ void FileSegment::complete()
            {
                if (current_downloaded_size == 0)
                {
-                    LOG_TEST(log, "Remove file segment {} (nothing downloaded)", range().toString());
                    locked_key->removeFileSegment(offset(), segment_lock);
                }
                else
@ -698,9 +707,8 @@ void FileSegment::complete()

                    /// We mark current file segment with state DETACHED, even though the data is still in cache
                    /// (but a separate file segment) because is_last_holder is satisfied, so it does not matter.
+                    setDetachedState(segment_lock);
                }
-
-                setDetachedState(segment_lock);
            }
            break;
        }
@ -870,6 +878,8 @@ void FileSegment::setDetachedState(const FileSegmentGuard::Lock & lock)
    key_metadata.reset();
    cache = nullptr;
    queue_iterator = nullptr;
+    cache_writer.reset();
+    remote_file_reader.reset();
 }

 void FileSegment::detach(const FileSegmentGuard::Lock & lock, const LockedKey &)
--- a/src/Interpreters/Cache/Metadata.cpp
+++ b/src/Interpreters/Cache/Metadata.cpp
@ -1,12 +1,18 @@
 #include <Interpreters/Cache/Metadata.h>
 #include <Interpreters/Cache/FileCache.h>
 #include <Interpreters/Cache/FileSegment.h>
+#include "Common/Exception.h"
 #include <Common/logger_useful.h>
 #include <Common/ElapsedTimeProfileEventIncrement.h>
 #include <filesystem>

 namespace fs = std::filesystem;

+namespace CurrentMetrics
+{
+    extern const Metric FilesystemCacheDownloadQueueElements;
+}
+
 namespace ProfileEvents
 {
    extern const Event FilesystemCacheLockKeyMicroseconds;
@ -19,6 +25,7 @@ namespace DB
 namespace ErrorCodes
 {
    extern const int LOGICAL_ERROR;
+    extern const int BAD_ARGUMENTS;
 }

 FileSegmentMetadata::FileSegmentMetadata(FileSegmentPtr && file_segment_)
@ -53,11 +60,13 @@ KeyMetadata::KeyMetadata(
    const Key & key_,
    const std::string & key_path_,
    CleanupQueue & cleanup_queue_,
+    DownloadQueue & download_queue_,
    Poco::Logger * log_,
    bool created_base_directory_)
    : key(key_)
    , key_path(key_path_)
    , cleanup_queue(cleanup_queue_)
+    , download_queue(download_queue_)
    , created_base_directory(created_base_directory_)
    , log(log_)
 {
@ -134,6 +143,7 @@ private:
 CacheMetadata::CacheMetadata(const std::string & path_)
    : path(path_)
    , cleanup_queue(std::make_unique<CleanupQueue>())
+    , download_queue(std::make_unique<DownloadQueue>())
    , log(&Poco::Logger::get("CacheMetadata"))
 {
 }
@ -182,13 +192,15 @@ LockedKeyPtr CacheMetadata::lockKeyMetadata(
        if (it == end())
        {
            if (key_not_found_policy == KeyNotFoundPolicy::THROW)
+                throw Exception(ErrorCodes::BAD_ARGUMENTS, "No such key `{}` in cache", key);
+            else if (key_not_found_policy == KeyNotFoundPolicy::THROW_LOGICAL)
                throw Exception(ErrorCodes::LOGICAL_ERROR, "No such key `{}` in cache", key);
            else if (key_not_found_policy == KeyNotFoundPolicy::RETURN_NULL)
                return nullptr;

            it = emplace(
                key, std::make_shared<KeyMetadata>(
-                    key, getPathForKey(key), *cleanup_queue, log, is_initial_load)).first;
+                    key, getPathForKey(key), *cleanup_queue, *download_queue, log, is_initial_load)).first;
        }

        key_metadata = it->second;
@ -206,6 +218,8 @@ LockedKeyPtr CacheMetadata::lockKeyMetadata(
            return locked_metadata;

        if (key_not_found_policy == KeyNotFoundPolicy::THROW)
+            throw Exception(ErrorCodes::BAD_ARGUMENTS, "No such key `{}` in cache", key);
+        else if (key_not_found_policy == KeyNotFoundPolicy::THROW_LOGICAL)
            throw Exception(ErrorCodes::LOGICAL_ERROR, "No such key `{}` in cache", key);

        if (key_not_found_policy == KeyNotFoundPolicy::RETURN_NULL)
@ -279,6 +293,7 @@ void CacheMetadata::doCleanup()
            continue;
        }

+        chassert(it->second->empty());
        locked_metadata->markAsRemoved();
        erase(it);
        LOG_DEBUG(log, "Key {} is removed from metadata", cleanup_key);
@ -319,6 +334,199 @@ void CacheMetadata::doCleanup()
    }
 }

+class DownloadQueue
+{
+friend struct CacheMetadata;
+public:
+    void add(FileSegmentPtr file_segment)
+    {
+        {
+            std::lock_guard lock(mutex);
+            queue.emplace(file_segment->key(), file_segment->offset(), file_segment);
+        }
+
+        CurrentMetrics::add(CurrentMetrics::FilesystemCacheDownloadQueueElements);
+        cv.notify_one();
+    }
+
+private:
+    void cancel()
+    {
+        {
+            std::lock_guard lock(mutex);
+            cancelled = true;
+        }
+        cv.notify_all();
+    }
+
+    std::mutex mutex;
+    std::condition_variable cv;
+    bool cancelled = false;
+
+    struct DownloadInfo
+    {
+        CacheMetadata::Key key;
+        size_t offset;
+        /// We keep weak pointer to file segment
+        /// instead of just getting it from file_segment_metadata,
+        /// because file segment at key:offset count be removed and added back to metadata
+        /// before we actually started background download.
+        std::weak_ptr<FileSegment> file_segment;
+    };
+    std::queue<DownloadInfo> queue;
+};
+
+void CacheMetadata::downloadThreadFunc()
+{
+    std::optional<Memory<>> memory;
+    while (true)
+    {
+        Key key;
+        size_t offset;
+        std::weak_ptr<FileSegment> file_segment_weak;
+
+        {
+            std::unique_lock lock(download_queue->mutex);
+
+            if (download_queue->cancelled)
+                return;
+
+            if (download_queue->queue.empty())
+            {
+                download_queue->cv.wait(lock);
+                continue;
+            }
+
+            auto entry = download_queue->queue.front();
+            key = entry.key;
+            offset = entry.offset;
+            file_segment_weak = entry.file_segment;
+
+            download_queue->queue.pop();
+        }
+
+        CurrentMetrics::sub(CurrentMetrics::FilesystemCacheDownloadQueueElements);
+
+        FileSegmentsHolderPtr holder;
+        try
+        {
+            {
+                auto locked_key = lockKeyMetadata(key, KeyNotFoundPolicy::RETURN_NULL);
+                if (!locked_key)
+                    continue;
+
+                auto file_segment_metadata = locked_key->tryGetByOffset(offset);
+                if (!file_segment_metadata || file_segment_metadata->evicting())
+                    continue;
+
+                auto file_segment = file_segment_weak.lock();
+
+                if (!file_segment
+                    || file_segment != file_segment_metadata->file_segment
+                    || file_segment->state() != FileSegment::State::PARTIALLY_DOWNLOADED)
+                    continue;
+
+                holder = std::make_unique<FileSegmentsHolder>(FileSegments{file_segment});
+            }
+
+            downloadImpl(holder->front(), memory);
+        }
+        catch (...)
+        {
+            if (holder)
+            {
+                const auto & file_segment = holder->front();
+                LOG_ERROR(
+                    log, "Error during background download of {}:{} ({}): {}",
+                    file_segment.key(), file_segment.offset(),
+                    file_segment.getInfoForLog(), getCurrentExceptionMessage(true));
+            }
+            else
+            {
+                tryLogCurrentException(__PRETTY_FUNCTION__);
+                chassert(false);
+            }
+        }
+    }
+}
+
+void CacheMetadata::downloadImpl(FileSegment & file_segment, std::optional<Memory<>> & memory)
+{
+    chassert(file_segment.assertCorrectness());
+
+    if (file_segment.getOrSetDownloader() != FileSegment::getCallerId())
+        return;
+
+    if (file_segment.getDownloadedSize(false) == file_segment.range().size())
+        throw Exception(ErrorCodes::LOGICAL_ERROR, "File segment is already fully downloaded");
+
+    LOG_TEST(
+        log, "Downloading {} bytes for file segment {}",
+        file_segment.range().size() - file_segment.getDownloadedSize(false), file_segment.getInfoForLog());
+
+    auto reader = file_segment.getRemoteFileReader();
+
+    if (!reader)
+    {
+        throw Exception(
+            ErrorCodes::LOGICAL_ERROR, "No reader. "
+            "File segment should not have been submitted for background download ({})",
+            file_segment.getInfoForLog());
+    }
+
+    /// If remote_fs_read_method == 'threadpool',
+    /// reader itself never owns/allocates the buffer.
+    if (reader->internalBuffer().empty())
+    {
+        if (!memory)
+            memory.emplace(DBMS_DEFAULT_BUFFER_SIZE);
+        reader->set(memory->data(), memory->size());
+    }
+
+    size_t offset = file_segment.getCurrentWriteOffset(false);
+    if (offset != static_cast<size_t>(reader->getPosition()))
+        reader->seek(offset, SEEK_SET);
+
+    while (!reader->eof())
+    {
+        auto size = reader->available();
+
+        if (!file_segment.reserve(size))
+        {
+            LOG_TEST(
+                log, "Failed to reserve space during background download "
+                "for {}:{} (downloaded size: {}/{})",
+                file_segment.key(), file_segment.offset(),
+                file_segment.getDownloadedSize(false), file_segment.range().size());
+            return;
+        }
+
+        try
+        {
+            file_segment.write(reader->position(), size, offset);
+            offset += size;
+            reader->position() += size;
+        }
+        catch (ErrnoException & e)
+        {
+            int code = e.getErrno();
+            if (code == /* No space left on device */28 || code == /* Quota exceeded */122)
+            {
+                LOG_INFO(log, "Insert into cache is skipped due to insufficient disk space. ({})", e.displayText());
+                return;
+            }
+            throw;
+        }
+    }
+
+    LOG_TEST(log, "Downloaded file segment: {}", file_segment.getInfoForLog());
+}
+
+void CacheMetadata::cancelDownload()
+{
+    download_queue->cancel();
+}
+
 LockedKey::LockedKey(std::shared_ptr<KeyMetadata> key_metadata_)
    : key_metadata(key_metadata_)
    , lock(key_metadata->guard.lock())
@ -355,11 +563,11 @@ bool LockedKey::isLastOwnerOfFileSegment(size_t offset) const
    return file_segment_metadata->file_segment.use_count() == 2;
 }

-void LockedKey::removeAllReleasable()
+void LockedKey::removeAll(bool if_releasable)
 {
    for (auto it = key_metadata->begin(); it != key_metadata->end();)
    {
-        if (!it->second->releasable())
+        if (if_releasable && !it->second->releasable())
        {
            ++it;
            continue;
@ -380,17 +588,32 @@ void LockedKey::removeAllReleasable()
    }
 }

+KeyMetadata::iterator LockedKey::removeFileSegment(size_t offset)
+{
+    auto it = key_metadata->find(offset);
+    if (it == key_metadata->end())
+        throw Exception(ErrorCodes::BAD_ARGUMENTS, "There is no offset {}", offset);
+
+    auto file_segment = it->second->file_segment;
+    return removeFileSegmentImpl(it, file_segment->lock());
+}
+
 KeyMetadata::iterator LockedKey::removeFileSegment(size_t offset, const FileSegmentGuard::Lock & segment_lock)
 {
    auto it = key_metadata->find(offset);
    if (it == key_metadata->end())
        throw Exception(ErrorCodes::LOGICAL_ERROR, "There is no offset {}", offset);

+    return removeFileSegmentImpl(it, segment_lock);
+}
+
+KeyMetadata::iterator LockedKey::removeFileSegmentImpl(KeyMetadata::iterator it, const FileSegmentGuard::Lock & segment_lock)
+{
    auto file_segment = it->second->file_segment;

    LOG_DEBUG(
        key_metadata->log, "Remove from cache. Key: {}, offset: {}, size: {}",
-        getKey(), offset, file_segment->reserved_size);
+        getKey(), file_segment->offset(), file_segment->reserved_size);

    chassert(file_segment->assertCorrectnessUnlocked(segment_lock));

@ -456,6 +679,14 @@ void LockedKey::shrinkFileSegmentToDownloadedSize(
    chassert(file_segment->assertCorrectnessUnlocked(segment_lock));
 }

+void LockedKey::addToDownloadQueue(size_t offset, const FileSegmentGuard::Lock &)
+{
+    auto it = key_metadata->find(offset);
+    if (it == key_metadata->end())
+        throw Exception(ErrorCodes::LOGICAL_ERROR, "There is not offset {}", offset);
+    key_metadata->download_queue.add(it->second->file_segment);
+}
+
 std::optional<FileSegment::Range> LockedKey::hasIntersectingRange(const FileSegment::Range & range) const
 {
    if (key_metadata->empty())
--- a/src/Interpreters/Cache/Metadata.h
+++ b/src/Interpreters/Cache/Metadata.h
@ -8,8 +8,12 @@

 namespace DB
 {
+
 class CleanupQueue;
 using CleanupQueuePtr = std::shared_ptr<CleanupQueue>;
+class DownloadQueue;
+using DownloadQueuePtr = std::shared_ptr<DownloadQueue>;
+using FileSegmentsHolderPtr = std::unique_ptr<FileSegmentsHolder>;


 struct FileSegmentMetadata : private boost::noncopyable
@ -44,6 +48,7 @@ struct KeyMetadata : public std::map<size_t, FileSegmentMetadataPtr>,
        const Key & key_,
        const std::string & key_path_,
        CleanupQueue & cleanup_queue_,
+        DownloadQueue & download_queue_,
        Poco::Logger * log_,
        bool created_base_directory_ = false);

@ -70,6 +75,7 @@ private:
    KeyState key_state = KeyState::ACTIVE;
    KeyGuard guard;
    CleanupQueue & cleanup_queue;
+    DownloadQueue & download_queue;
    std::atomic<bool> created_base_directory = false;
    Poco::Logger * log;
 };
@ -81,7 +87,7 @@ struct CacheMetadata : public std::unordered_map<FileCacheKey, KeyMetadataPtr>,
 {
 public:
    using Key = FileCacheKey;
-    using IterateCacheMetadataFunc = std::function<void(const LockedKey &)>;
+    using IterateCacheMetadataFunc = std::function<void(LockedKey &)>;

    explicit CacheMetadata(const std::string & path_);

@ -100,6 +106,7 @@ public:
    enum class KeyNotFoundPolicy
    {
        THROW,
+        THROW_LOGICAL,
        CREATE_EMPTY,
        RETURN_NULL,
    };
@ -111,12 +118,19 @@ public:

    void doCleanup();

+    void downloadThreadFunc();
+
+    void cancelDownload();
+
 private:
    CacheMetadataGuard::Lock lockMetadata() const;
    const std::string path; /// Cache base path
    mutable CacheMetadataGuard guard;
    const CleanupQueuePtr cleanup_queue;
+    const DownloadQueuePtr download_queue;
    Poco::Logger * log;
+
+    void downloadImpl(FileSegment & file_segment, std::optional<Memory<>> & memory);
 };


@ -156,12 +170,15 @@ struct LockedKey : private boost::noncopyable
    std::shared_ptr<const KeyMetadata> getKeyMetadata() const { return key_metadata; }
    std::shared_ptr<KeyMetadata> getKeyMetadata() { return key_metadata; }

-    void removeAllReleasable();
+    void removeAll(bool if_releasable = true);

    KeyMetadata::iterator removeFileSegment(size_t offset, const FileSegmentGuard::Lock &);
+    KeyMetadata::iterator removeFileSegment(size_t offset);

    void shrinkFileSegmentToDownloadedSize(size_t offset, const FileSegmentGuard::Lock &);

+    void addToDownloadQueue(size_t offset, const FileSegmentGuard::Lock &);
+
    bool isLastOwnerOfFileSegment(size_t offset) const;

    std::optional<FileSegment::Range> hasIntersectingRange(const FileSegment::Range & range) const;
@ -173,6 +190,8 @@ struct LockedKey : private boost::noncopyable
    std::string toString() const;

 private:
+    KeyMetadata::iterator removeFileSegmentImpl(KeyMetadata::iterator it, const FileSegmentGuard::Lock &);
+
    const std::shared_ptr<KeyMetadata> key_metadata;
    KeyGuard::Lock lock; /// `lock` must be destructed before `key_metadata`.
 };
--- a/src/Interpreters/FilesystemCacheLog.cpp
+++ b/src/Interpreters/FilesystemCacheLog.cpp
@ -40,6 +40,8 @@ NamesAndTypesList FilesystemCacheLogElement::getNamesAndTypes()
        {"source_file_path", std::make_shared<DataTypeString>()},
        {"file_segment_range", std::make_shared<DataTypeTuple>(types)},
        {"total_requested_range", std::make_shared<DataTypeTuple>(types)},
+        {"key", std::make_shared<DataTypeString>()},
+        {"offset", std::make_shared<DataTypeUInt64>()},
        {"size", std::make_shared<DataTypeUInt64>()},
        {"read_type", std::make_shared<DataTypeString>()},
        {"read_from_cache_attempted", std::make_shared<DataTypeUInt8>()},
@ -60,6 +62,8 @@ void FilesystemCacheLogElement::appendToBlock(MutableColumns & columns) const
    columns[i++]->insert(source_file_path);
    columns[i++]->insert(Tuple{file_segment_range.first, file_segment_range.second});
    columns[i++]->insert(Tuple{requested_range.first, requested_range.second});
+    columns[i++]->insert(file_segment_key);
+    columns[i++]->insert(file_segment_offset);
    columns[i++]->insert(file_segment_size);
    columns[i++]->insert(typeToString(cache_type));
    columns[i++]->insert(read_from_cache_attempted);
--- a/src/Interpreters/FilesystemCacheLog.h
+++ b/src/Interpreters/FilesystemCacheLog.h
@ -39,6 +39,8 @@ struct FilesystemCacheLogElement
    std::pair<size_t, size_t> file_segment_range{};
    std::pair<size_t, size_t> requested_range{};
    CacheType cache_type{};
+    std::string file_segment_key;
+    size_t file_segment_offset;
    size_t file_segment_size;
    bool read_from_cache_attempted;
    String read_buffer_id;
--- a/src/Interpreters/InterpreterDescribeCacheQuery.cpp
+++ b/src/Interpreters/InterpreterDescribeCacheQuery.cpp
@ -19,11 +19,15 @@ static Block getSampleBlock()
        ColumnWithTypeAndName{std::make_shared<DataTypeUInt64>(), "max_size"},
        ColumnWithTypeAndName{std::make_shared<DataTypeUInt64>(), "max_elements"},
        ColumnWithTypeAndName{std::make_shared<DataTypeUInt64>(), "max_file_segment_size"},
+        ColumnWithTypeAndName{std::make_shared<DataTypeUInt64>(), "boundary_alignment"},
        ColumnWithTypeAndName{std::make_shared<DataTypeNumber<UInt8>>(), "cache_on_write_operations"},
        ColumnWithTypeAndName{std::make_shared<DataTypeNumber<UInt8>>(), "cache_hits_threshold"},
        ColumnWithTypeAndName{std::make_shared<DataTypeUInt64>(), "current_size"},
        ColumnWithTypeAndName{std::make_shared<DataTypeUInt64>(), "current_elements"},
        ColumnWithTypeAndName{std::make_shared<DataTypeString>(), "path"},
+        ColumnWithTypeAndName{std::make_shared<DataTypeNumber<UInt64>>(), "delayed_cleanup_interval_ms"},
+        ColumnWithTypeAndName{std::make_shared<DataTypeNumber<UInt64>>(), "background_download_threads"},
+        ColumnWithTypeAndName{std::make_shared<DataTypeNumber<UInt64>>(), "enable_bypass_cache_with_threshold"},
    };
    return Block(columns);
 }
@ -40,14 +44,19 @@ BlockIO InterpreterDescribeCacheQuery::execute()
    const auto & settings = cache_data.settings;
    const auto & cache = cache_data.cache;

-    res_columns[0]->insert(settings.max_size);
-    res_columns[1]->insert(settings.max_elements);
-    res_columns[2]->insert(settings.max_file_segment_size);
-    res_columns[3]->insert(settings.cache_on_write_operations);
-    res_columns[4]->insert(settings.cache_hits_threshold);
-    res_columns[5]->insert(cache->getUsedCacheSize());
-    res_columns[6]->insert(cache->getFileSegmentsNum());
-    res_columns[7]->insert(cache->getBasePath());
+    size_t i = 0;
+    res_columns[i++]->insert(settings.max_size);
+    res_columns[i++]->insert(settings.max_elements);
+    res_columns[i++]->insert(settings.max_file_segment_size);
+    res_columns[i++]->insert(settings.boundary_alignment);
+    res_columns[i++]->insert(settings.cache_on_write_operations);
+    res_columns[i++]->insert(settings.cache_hits_threshold);
+    res_columns[i++]->insert(cache->getUsedCacheSize());
+    res_columns[i++]->insert(cache->getFileSegmentsNum());
+    res_columns[i++]->insert(cache->getBasePath());
+    res_columns[i++]->insert(settings.delayed_cleanup_interval_ms);
+    res_columns[i++]->insert(settings.background_download_threads);
+    res_columns[i++]->insert(settings.enable_bypass_cache_with_threashold);

    BlockIO res;
    size_t num_rows = res_columns[0]->size();
--- a/src/Interpreters/InterpreterSystemQuery.cpp
+++ b/src/Interpreters/InterpreterSystemQuery.cpp
@ -370,7 +370,18 @@ BlockIO InterpreterSystemQuery::execute()
            else
            {
                auto cache = FileCacheFactory::instance().getByName(query.filesystem_cache_name).cache;
-                cache->removeAllReleasable();
+                if (query.delete_key.empty())
+                {
+                    cache->removeAllReleasable();
+                }
+                else
+                {
+                    auto key = FileCacheKey::fromKeyString(query.delete_key);
+                    if (query.delete_offset.has_value())
+                        cache->removeFileSegment(key, query.delete_offset.value());
+                    else
+                        cache->removeKey(key);
+                }
            }
            break;
        }
--- a/src/Interpreters/tests/gtest_lru_file_cache.cpp
+++ b/src/Interpreters/tests/gtest_lru_file_cache.cpp
@ -544,8 +544,8 @@ TEST_F(FileCacheTest, get)
                cv.notify_one();

                file_segment2.wait(file_segment2.range().left);
-                ASSERT_TRUE(file_segment2.state() == DB::FileSegment::State::PARTIALLY_DOWNLOADED);
-                ASSERT_TRUE(file_segment2.getOrSetDownloader() == DB::FileSegment::getCallerId());
+                ASSERT_EQ(file_segment2.state(), DB::FileSegment::State::EMPTY);
+                ASSERT_EQ(file_segment2.getOrSetDownloader(), DB::FileSegment::getCallerId());
                download(file_segment2);
            });

--- a/src/Parsers/ASTSystemQuery.cpp
+++ b/src/Parsers/ASTSystemQuery.cpp
@ -210,7 +210,15 @@ void ASTSystemQuery::formatImpl(const FormatSettings & settings, FormatState &,
    else if (type == Type::DROP_FILESYSTEM_CACHE)
    {
        if (!filesystem_cache_name.empty())
+        {
            settings.ostr << (settings.hilite ? hilite_none : "") << " " << filesystem_cache_name;
+            if (!delete_key.empty())
+            {
+                settings.ostr << (settings.hilite ? hilite_none : "") << " KEY " << delete_key;
+                if (delete_offset.has_value())
+                    settings.ostr << (settings.hilite ? hilite_none : "") << " OFFSET " << delete_offset.value();
+            }
+        }
    }
    else if (type == Type::UNFREEZE)
    {
--- a/src/Parsers/ASTSystemQuery.h
+++ b/src/Parsers/ASTSystemQuery.h
@ -107,6 +107,8 @@ public:
    UInt64 seconds{};

    String filesystem_cache_name;
+    std::string delete_key;
+    std::optional<size_t> delete_offset;

    String backup_name;

--- a/src/Parsers/ParserSystemQuery.cpp
+++ b/src/Parsers/ParserSystemQuery.cpp
@ -405,7 +405,15 @@ bool ParserSystemQuery::parseImpl(IParser::Pos & pos, ASTPtr & node, Expected &
            ParserLiteral path_parser;
            ASTPtr ast;
            if (path_parser.parse(pos, ast, expected))
+            {
                res->filesystem_cache_name = ast->as<ASTLiteral>()->value.safeGet<String>();
+                if (ParserKeyword{"KEY"}.ignore(pos, expected) && ParserIdentifier().parse(pos, ast, expected))
+                {
+                    res->delete_key = ast->as<ASTIdentifier>()->name();
+                    if (ParserKeyword{"OFFSET"}.ignore(pos, expected) && ParserLiteral().parse(pos, ast, expected))
+                        res->delete_offset = ast->as<ASTLiteral>()->value.safeGet<UInt64>();
+                }
+            }
            if (!parseQueryWithOnCluster(res, pos, expected))
                return false;
            break;
--- a/src/Processors/Transforms/buildPushingToViewsChain.cpp
+++ b/src/Processors/Transforms/buildPushingToViewsChain.cpp
@ -282,7 +282,7 @@ Chain buildPushingToViewsChain(
        auto * original_thread = current_thread;
        SCOPE_EXIT({ current_thread = original_thread; });

-        std::unique_ptr<ThreadStatus> view_thread_status_ptr = std::make_unique<ThreadStatus>();
+        std::unique_ptr<ThreadStatus> view_thread_status_ptr = std::make_unique<ThreadStatus>(/*check_current_thread_on_destruction=*/ false);
        /// Copy of a ThreadStatus should be internal.
        view_thread_status_ptr->setInternalThread();
        view_thread_status_ptr->attachToGroup(running_group);
--- a/src/Storages/Distributed/DistributedAsyncInsertHeader.cpp
+++ b/src/Storages/Distributed/DistributedAsyncInsertHeader.cpp
@ -39,9 +39,8 @@ DistributedAsyncInsertHeader DistributedAsyncInsertHeader::read(ReadBufferFromFi
        if (expected_checksum != calculated_checksum)
        {
            throw Exception(ErrorCodes::CHECKSUM_DOESNT_MATCH,
-                            "Checksum of extra info doesn't match: corrupted data. Reference: {}{}. Actual: {}{}.",
-                            getHexUIntLowercase(expected_checksum.high64), getHexUIntLowercase(expected_checksum.low64),
-                            getHexUIntLowercase(calculated_checksum.high64), getHexUIntLowercase(calculated_checksum.low64));
+                            "Checksum of extra info doesn't match: corrupted data. Reference: {}. Actual: {}.",
+                            getHexUIntLowercase(expected_checksum), getHexUIntLowercase(calculated_checksum));
        }

        /// Read the parts of the header.
--- a/src/Storages/MergeTree/DataPartStorageOnDiskFull.cpp
+++ b/src/Storages/MergeTree/DataPartStorageOnDiskFull.cpp
@ -80,6 +80,11 @@ DataPartStorageIteratorPtr DataPartStorageOnDiskFull::iterate() const
        volume->getDisk()->iterateDirectory(fs::path(root_path) / part_dir));
 }

+Poco::Timestamp DataPartStorageOnDiskFull::getFileLastModified(const String & file_name) const
+{
+    return volume->getDisk()->getLastModified(fs::path(root_path) / part_dir / file_name);
+}
+
 size_t DataPartStorageOnDiskFull::getFileSize(const String & file_name) const
 {
    return volume->getDisk()->getFileSize(fs::path(root_path) / part_dir / file_name);
--- a/src/Storages/MergeTree/DataPartStorageOnDiskFull.h
+++ b/src/Storages/MergeTree/DataPartStorageOnDiskFull.h
@ -20,6 +20,7 @@ public:
    bool isDirectory(const std::string & name) const override;

    DataPartStorageIteratorPtr iterate() const override;
+    Poco::Timestamp getFileLastModified(const String & file_name) const override;
    size_t getFileSize(const std::string & file_name) const override;
    UInt32 getRefCount(const std::string & file_name) const override;
    std::string getRemotePath(const std::string & file_name) const override;
--- a/src/Storages/MergeTree/IDataPartStorage.h
+++ b/src/Storages/MergeTree/IDataPartStorage.h
@ -122,6 +122,7 @@ public:
    virtual DataPartStorageIteratorPtr iterate() const = 0;

    /// Get metadata for a file inside path dir.
+    virtual Poco::Timestamp getFileLastModified(const std::string & file_name) const = 0;
    virtual size_t getFileSize(const std::string & file_name) const = 0;
    virtual UInt32 getRefCount(const std::string & file_name) const = 0;

--- a/src/Storages/MergeTree/IMergeTreeDataPart.h
+++ b/src/Storages/MergeTree/IMergeTreeDataPart.h
@ -116,6 +116,8 @@ public:
    /// Otherwise return information about column size on disk.
    ColumnSize getColumnSize(const String & column_name) const;

+    virtual std::optional<time_t> getColumnModificationTime(const String & column_name) const = 0;
+
    /// NOTE: Returns zeros if secondary indexes are not found in checksums.
    /// Otherwise return information about secondary index size on disk.
    IndexSize getSecondaryIndexSize(const String & secondary_index_name) const;
--- a/src/Storages/MergeTree/MergeTreeData.cpp
+++ b/src/Storages/MergeTree/MergeTreeData.cpp
@ -4529,9 +4529,8 @@ MergeTreeData::DataPartPtr MergeTreeData::getActiveContainingPart(
 }


-void MergeTreeData::swapActivePart(MergeTreeData::DataPartPtr part_copy)
+void MergeTreeData::swapActivePart(MergeTreeData::DataPartPtr part_copy, DataPartsLock &)
 {
-    auto lock = lockParts();
    for (auto original_active_part : getDataPartsStateRange(DataPartState::Active)) // NOLINT (copy is intended)
    {
        if (part_copy->name == original_active_part->name)
@ -4587,6 +4586,12 @@ MergeTreeData::DataPartPtr MergeTreeData::getActiveContainingPart(const String &
    return getActiveContainingPart(part_info);
 }

+MergeTreeData::DataPartPtr MergeTreeData::getActiveContainingPart(const String & part_name, DataPartsLock & lock) const
+{
+    auto part_info = MergeTreePartInfo::fromPartName(part_name, format_version);
+    return getActiveContainingPart(part_info, DataPartState::Active, lock);
+}
+
 MergeTreeData::DataPartsVector MergeTreeData::getVisibleDataPartsVectorInPartition(ContextPtr local_context, const String & partition_id) const
 {
    return getVisibleDataPartsVectorInPartition(local_context->getCurrentTransaction().get(), partition_id);
--- a/src/Storages/MergeTree/MergeTreeData.h
+++ b/src/Storages/MergeTree/MergeTreeData.h
@ -504,12 +504,13 @@ public:

    /// Returns a part in Active state with the given name or a part containing it. If there is no such part, returns nullptr.
    DataPartPtr getActiveContainingPart(const String & part_name) const;
+    DataPartPtr getActiveContainingPart(const String & part_name, DataPartsLock & lock) const;
    DataPartPtr getActiveContainingPart(const MergeTreePartInfo & part_info) const;
    DataPartPtr getActiveContainingPart(const MergeTreePartInfo & part_info, DataPartState state, DataPartsLock & lock) const;

    /// Swap part with it's identical copy (possible with another path on another disk).
    /// If original part is not active or doesn't exist exception will be thrown.
-    void swapActivePart(MergeTreeData::DataPartPtr part_copy);
+    void swapActivePart(MergeTreeData::DataPartPtr part_copy, DataPartsLock &);

    /// Returns all parts in specified partition
    DataPartsVector getVisibleDataPartsVectorInPartition(MergeTreeTransaction * txn, const String & partition_id, DataPartsLock * acquired_lock = nullptr) const;
--- a/src/Storages/MergeTree/MergeTreeDataPartChecksum.cpp
+++ b/src/Storages/MergeTree/MergeTreeDataPartChecksum.cpp
@ -307,19 +307,7 @@ static void updateHash(SipHash & hash, const std::string & data)
 /// Hash is the same as MinimalisticDataPartChecksums::hash_of_all_files
 String MergeTreeDataPartChecksums::getTotalChecksumHex() const
 {
-    SipHash hash_of_all_files;
-
-    for (const auto & [name, checksum] : files)
-    {
-        updateHash(hash_of_all_files, name);
-        hash_of_all_files.update(checksum.file_hash);
-    }
-
-    UInt64 lo;
-    UInt64 hi;
-    hash_of_all_files.get128(lo, hi);
-
-    return getHexUIntUppercase(hi) + getHexUIntUppercase(lo);
+    return getHexUIntUppercase(getTotalChecksumUInt128());
 }

 MergeTreeDataPartChecksums::Checksum::uint128 MergeTreeDataPartChecksums::getTotalChecksumUInt128() const
--- a/src/Storages/MergeTree/MergeTreeDataPartCompact.cpp
+++ b/src/Storages/MergeTree/MergeTreeDataPartCompact.cpp
@ -144,6 +144,11 @@ bool MergeTreeDataPartCompact::hasColumnFiles(const NameAndTypePair & column) co
    return (bin_checksum != checksums.files.end() && mrk_checksum != checksums.files.end());
 }

+std::optional<time_t> MergeTreeDataPartCompact::getColumnModificationTime(const String & /* column_name */) const
+{
+    return getDataPartStorage().getFileLastModified(DATA_FILE_NAME_WITH_EXTENSION).epochTime();
+}
+
 void MergeTreeDataPartCompact::checkConsistency(bool require_part_metadata) const
 {
    checkConsistencyBase();
--- a/src/Storages/MergeTree/MergeTreeDataPartCompact.h
+++ b/src/Storages/MergeTree/MergeTreeDataPartCompact.h
@ -55,6 +55,8 @@ public:

    bool hasColumnFiles(const NameAndTypePair & column) const override;

+    std::optional<time_t> getColumnModificationTime(const String & column_name) const override;
+
    String getFileNameForColumn(const NameAndTypePair & /* column */) const override { return DATA_FILE_NAME; }

    ~MergeTreeDataPartCompact() override;
--- a/src/Storages/MergeTree/MergeTreeDataPartInMemory.h
+++ b/src/Storages/MergeTree/MergeTreeDataPartInMemory.h
@ -43,6 +43,7 @@ public:
    String getFileNameForColumn(const NameAndTypePair & /* column */) const override { return ""; }
    void renameTo(const String & new_relative_path, bool remove_new_dir_if_exists) override;
    DataPartStoragePtr makeCloneInDetached(const String & prefix, const StorageMetadataPtr & metadata_snapshot) const override;
+    std::optional<time_t> getColumnModificationTime(const String & /* column_name */) const override { return {}; }

    MutableDataPartStoragePtr flushToDisk(const String & new_relative_path, const StorageMetadataPtr & metadata_snapshot) const;

--- a/src/Storages/MergeTree/MergeTreeDataPartWide.cpp
+++ b/src/Storages/MergeTree/MergeTreeDataPartWide.cpp
@ -260,6 +260,18 @@ bool MergeTreeDataPartWide::hasColumnFiles(const NameAndTypePair & column) const
    return res;
 }

+std::optional<time_t> MergeTreeDataPartWide::getColumnModificationTime(const String & column_name) const
+{
+    try
+    {
+        return getDataPartStorage().getFileLastModified(column_name + DATA_FILE_EXTENSION).epochTime();
+    }
+    catch (const fs::filesystem_error &)
+    {
+        return {};
+    }
+}
+
 String MergeTreeDataPartWide::getFileNameForColumn(const NameAndTypePair & column) const
 {
    String filename;
--- a/src/Storages/MergeTree/MergeTreeDataPartWide.h
+++ b/src/Storages/MergeTree/MergeTreeDataPartWide.h
@ -54,6 +54,8 @@ public:

    bool hasColumnFiles(const NameAndTypePair & column) const override;

+    std::optional<time_t> getColumnModificationTime(const String & column_name) const override;
+
 protected:
    static void loadIndexGranularityImpl(
        MergeTreeIndexGranularity & index_granularity_, MergeTreeIndexGranularityInfo & index_granularity_info_,
--- a/src/Storages/MergeTree/MergeTreePartsMover.cpp
+++ b/src/Storages/MergeTree/MergeTreePartsMover.cpp
@ -263,7 +263,10 @@ void MergeTreePartsMover::swapClonedPart(TemporaryClonedPart & cloned_part) cons
    if (moves_blocker.isCancelled())
        throw Exception(ErrorCodes::ABORTED, "Cancelled moving parts.");

-    auto active_part = data->getActiveContainingPart(cloned_part.part->name);
+    /// `getActiveContainingPart` and `swapActivePart` are called under the same lock
+    /// to prevent part becoming inactive between calls
+    auto part_lock = data->lockParts();
+    auto active_part = data->getActiveContainingPart(cloned_part.part->name, part_lock);

    /// It's ok, because we don't block moving parts for merges or mutations
    if (!active_part || active_part->name != cloned_part.part->name)
@ -284,7 +287,7 @@ void MergeTreePartsMover::swapClonedPart(TemporaryClonedPart & cloned_part) cons
    cloned_part.part->renameTo(active_part->name, false);

    /// TODO what happen if server goes down here?
-    data->swapActivePart(cloned_part.part);
+    data->swapActivePart(cloned_part.part, part_lock);

    LOG_TRACE(log, "Part {} was moved to {}", cloned_part.part->name, cloned_part.part->getDataPartStorage().getFullPath());

--- a/src/Storages/MergeTree/PartMetadataManagerWithCache.cpp
+++ b/src/Storages/MergeTree/PartMetadataManagerWithCache.cpp
@ -250,8 +250,8 @@ std::unordered_map<String, IPartMetadataManager::uint128> PartMetadataManagerWit
                    ErrorCodes::CORRUPTED_DATA,
                    "Checksums doesn't match in part {} for {}. Expected: {}. Found {}.",
                    part->name, file_path,
-                    getHexUIntUppercase(disk_checksum.high64) + getHexUIntUppercase(disk_checksum.low64),
-                    getHexUIntUppercase(cache_checksums[i].high64) + getHexUIntUppercase(cache_checksums[i].low64));
+                    getHexUIntUppercase(disk_checksum),
+                    getHexUIntUppercase(cache_checksums[i]));

            disk_checksums.push_back(disk_checksum);
            continue;
@ -287,8 +287,8 @@ std::unordered_map<String, IPartMetadataManager::uint128> PartMetadataManagerWit
                ErrorCodes::CORRUPTED_DATA,
                "Checksums doesn't match in projection part {} {}. Expected: {}. Found {}.",
                part->name, proj_name,
-                getHexUIntUppercase(disk_checksum.high64) + getHexUIntUppercase(disk_checksum.low64),
-                getHexUIntUppercase(cache_checksums[i].high64) + getHexUIntUppercase(cache_checksums[i].low64));
+                getHexUIntUppercase(disk_checksum),
+                getHexUIntUppercase(cache_checksums[i]));
        disk_checksums.push_back(disk_checksum);
    }
    return results;
--- a/src/Storages/StorageReplicatedMergeTree.cpp
+++ b/src/Storages/StorageReplicatedMergeTree.cpp
@ -2900,8 +2900,7 @@ void StorageReplicatedMergeTree::cloneReplica(const String & source_replica, Coo
                desired_checksums = MinimalisticDataPartChecksums::deserializeFrom(desired_checksums_str);
            }

-            const auto [lo, hi] = desired_checksums.hash_of_all_files;
-            log_entry.part_checksum = getHexUIntUppercase(hi) + getHexUIntUppercase(lo);
+            log_entry.part_checksum = getHexUIntUppercase(desired_checksums.hash_of_all_files);
        }
        else
        {
--- a/src/Storages/System/StorageSystemParts.cpp
+++ b/src/Storages/System/StorageSystemParts.cpp
@ -252,17 +252,17 @@ void StorageSystemParts::processNextStorage(
            if (columns_mask[src_index++])
            {
                auto checksum = helper.hash_of_all_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
            }
            if (columns_mask[src_index++])
            {
                auto checksum = helper.hash_of_uncompressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
            }
            if (columns_mask[src_index++])
            {
                auto checksum = helper.uncompressed_hash_of_compressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
            }
        }

--- a/src/Storages/System/StorageSystemPartsColumns.cpp
+++ b/src/Storages/System/StorageSystemPartsColumns.cpp
@ -8,6 +8,7 @@
 #include <DataTypes/DataTypeDate.h>
 #include <DataTypes/DataTypeArray.h>
 #include <DataTypes/DataTypeNested.h>
+#include <DataTypes/DataTypeNullable.h>
 #include <DataTypes/NestedUtils.h>
 #include <DataTypes/DataTypeUUID.h>
 #include <Storages/VirtualColumnUtils.h>
@ -62,6 +63,8 @@ StorageSystemPartsColumns::StorageSystemPartsColumns(const StorageID & table_id_
        {"column_data_compressed_bytes",               std::make_shared<DataTypeUInt64>()},
        {"column_data_uncompressed_bytes",             std::make_shared<DataTypeUInt64>()},
        {"column_marks_bytes",                         std::make_shared<DataTypeUInt64>()},
+        {"column_modification_time",                   std::make_shared<DataTypeNullable>(std::make_shared<DataTypeDateTime>())},
+
        {"serialization_kind",                         std::make_shared<DataTypeString>()},
        {"subcolumns.names",                           std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())},
        {"subcolumns.types",                           std::make_shared<DataTypeArray>(std::make_shared<DataTypeString>())},
@ -235,6 +238,13 @@ void StorageSystemPartsColumns::processNextStorage(
                columns[res_index++]->insert(column_size.data_uncompressed);
            if (columns_mask[src_index++])
                columns[res_index++]->insert(column_size.marks);
+            if (columns_mask[src_index++])
+            {
+                if (auto column_modification_time = part->getColumnModificationTime(column.name))
+                    columns[res_index++]->insert(UInt64(column_modification_time.value()));
+                else
+                    columns[res_index++]->insertDefault();
+            }

            auto serialization = part->getSerialization(column.name);
            if (columns_mask[src_index++])
--- a/src/Storages/System/StorageSystemProjectionParts.cpp
+++ b/src/Storages/System/StorageSystemProjectionParts.cpp
@ -221,17 +221,17 @@ void StorageSystemProjectionParts::processNextStorage(
            if (columns_mask[src_index++])
            {
                auto checksum = helper.hash_of_all_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
            }
            if (columns_mask[src_index++])
            {
                auto checksum = helper.hash_of_uncompressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
            }
            if (columns_mask[src_index++])
            {
                auto checksum = helper.uncompressed_hash_of_compressed_files;
-                columns[res_index++]->insert(getHexUIntLowercase(checksum.high64) + getHexUIntLowercase(checksum.low64));
+                columns[res_index++]->insert(getHexUIntLowercase(checksum));
            }
        }

--- a/src/Storages/System/StorageSystemProjectionPartsColumns.cpp
+++ b/src/Storages/System/StorageSystemProjectionPartsColumns.cpp
@ -7,6 +7,7 @@
 #include <DataTypes/DataTypeDateTime.h>
 #include <DataTypes/DataTypeDate.h>
 #include <DataTypes/DataTypeUUID.h>
+#include <DataTypes/DataTypeNullable.h>
 #include <Storages/VirtualColumnUtils.h>
 #include <Databases/IDatabase.h>
 #include <Parsers/queryToString.h>
@ -66,7 +67,8 @@ StorageSystemProjectionPartsColumns::StorageSystemProjectionPartsColumns(const S
        {"column_bytes_on_disk",                       std::make_shared<DataTypeUInt64>()},
        {"column_data_compressed_bytes",               std::make_shared<DataTypeUInt64>()},
        {"column_data_uncompressed_bytes",             std::make_shared<DataTypeUInt64>()},
-        {"column_marks_bytes",                         std::make_shared<DataTypeUInt64>()}
+        {"column_marks_bytes",                         std::make_shared<DataTypeUInt64>()},
+        {"column_modification_time",                   std::make_shared<DataTypeNullable>(std::make_shared<DataTypeDateTime>())},
    }
    )
 {
@ -247,6 +249,13 @@ void StorageSystemProjectionPartsColumns::processNextStorage(
                columns[res_index++]->insert(column_size.data_uncompressed);
            if (columns_mask[src_index++])
                columns[res_index++]->insert(column_size.marks);
+            if (columns_mask[src_index++])
+            {
+                if (auto column_modification_time = part->getColumnModificationTime(column.name))
+                    columns[res_index++]->insert(UInt64(column_modification_time.value()));
+                else
+                    columns[res_index++]->insertDefault();
+            }

            if (has_state_column)
                columns[res_index++]->insert(part->stateString());
--- a/tests/ci/commit_status_helper.py
+++ b/tests/ci/commit_status_helper.py
@ -7,7 +7,7 @@ from typing import Dict, List, Literal, Optional, Union
 import logging

 from github import Github
-from github.GithubObject import _NotSetType, NotSet as NotSet  # type: ignore
+from github.GithubObject import _NotSetType, NotSet as NotSet
 from github.Commit import Commit
 from github.CommitStatus import CommitStatus
 from github.IssueComment import IssueComment
--- a/tests/ci/github_helper.py
+++ b/tests/ci/github_helper.py
@ -111,7 +111,7 @@ class GitHub(github.Github):
            # See https://github.com/PyGithub/PyGithub/issues/2202,
            # obj._rawData doesn't spend additional API requests
            # pylint: disable=protected-access
-            repo_url = issue._rawData["repository_url"]  # type: ignore
+            repo_url = issue._rawData["repository_url"]
            if repo_url not in repos:
                repos[repo_url] = issue.repository
            prs.append(
--- a/tests/ci/merge_pr.py
+++ b/tests/ci/merge_pr.py
@ -154,7 +154,7 @@ def get_workflows_for_head(repo: Repository, head_sha: str) -> List[WorkflowRun]
    return list(
        PaginatedList(
            WorkflowRun,
-            repo._requester,  # type:ignore # pylint:disable=protected-access
+            repo._requester,  # pylint:disable=protected-access
            f"{repo.url}/actions/runs",
            {"head_sha": head_sha},
            list_item="workflow_runs",
--- a/tests/config/config.d/merge_tree_old_dirs_cleanup.xml
+++ b/tests/config/config.d/merge_tree_old_dirs_cleanup.xml
@ -5,4 +5,5 @@
        <!-- Default is 60 seconds, but let's make tests more aggressive -->
        <merge_tree_clear_old_temporary_directories_interval_seconds>5</merge_tree_clear_old_temporary_directories_interval_seconds>
    </merge_tree>
+    <allow_remove_stale_moving_parts>true</allow_remove_stale_moving_parts>
 </clickhouse>
--- a/tests/integration/test_hedged_requests/test.py
+++ b/tests/integration/test_hedged_requests/test.py
@ -203,6 +203,9 @@ def update_configs(


 def test_stuck_replica(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs()

    cluster.pause_container("node_1")
@ -233,6 +236,9 @@ def test_stuck_replica(started_cluster):


 def test_long_query(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs()

    # Restart to reset pool states.
@ -249,12 +255,18 @@ def test_long_query(started_cluster):


 def test_send_table_status_sleep(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(node_1_sleep_in_send_tables_status=sleep_time)
    check_query(expected_replica="node_2")
    check_changing_replica_events(1)


 def test_send_table_status_sleep2(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_tables_status=sleep_time,
        node_2_sleep_in_send_tables_status=sleep_time,
@ -264,12 +276,18 @@ def test_send_table_status_sleep2(started_cluster):


 def test_send_data(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(node_1_sleep_in_send_data=sleep_time)
    check_query(expected_replica="node_2")
    check_changing_replica_events(1)


 def test_send_data2(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_data=sleep_time, node_2_sleep_in_send_data=sleep_time
    )
@ -278,6 +296,9 @@ def test_send_data2(started_cluster):


 def test_combination1(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_tables_status=sleep_time,
        node_2_sleep_in_send_data=sleep_time,
@ -287,6 +308,9 @@ def test_combination1(started_cluster):


 def test_combination2(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_data=sleep_time,
        node_2_sleep_in_send_tables_status=sleep_time,
@ -296,6 +320,9 @@ def test_combination2(started_cluster):


 def test_combination3(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_data=sleep_time,
        node_2_sleep_in_send_tables_status=1000,
@ -306,6 +333,9 @@ def test_combination3(started_cluster):


 def test_combination4(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_tables_status=1000,
        node_1_sleep_in_send_data=sleep_time,
@ -317,6 +347,9 @@ def test_combination4(started_cluster):


 def test_receive_timeout1(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    # Check the situation when first two replicas get receive timeout
    # in establishing connection, but the third replica is ok.
    update_configs(
@ -329,6 +362,9 @@ def test_receive_timeout1(started_cluster):


 def test_receive_timeout2(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    # Check the situation when first replica get receive timeout
    # in packet receiving but there are replicas in process of
    # connection establishing.
@ -342,6 +378,9 @@ def test_receive_timeout2(started_cluster):


 def test_initial_receive_timeout(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    # Check the situation when replicas don't respond after
    # receiving query (so, no packets were send to initiator)
    update_configs(
@ -360,6 +399,9 @@ def test_initial_receive_timeout(started_cluster):


 def test_async_connect(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs()

    NODES["node"].restart_clickhouse()
@ -390,6 +432,9 @@ def test_async_connect(started_cluster):


 def test_async_query_sending(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_after_receiving_query=5000,
        node_2_sleep_after_receiving_query=5000,
--- a/tests/integration/test_hedged_requests_parallel/test.py
+++ b/tests/integration/test_hedged_requests_parallel/test.py
@ -172,6 +172,9 @@ def update_configs(


 def test_send_table_status_sleep(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_tables_status=sleep_time,
        node_2_sleep_in_send_tables_status=sleep_time,
@ -181,6 +184,9 @@ def test_send_table_status_sleep(started_cluster):


 def test_send_data(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_data=sleep_time, node_2_sleep_in_send_data=sleep_time
    )
@ -189,6 +195,9 @@ def test_send_data(started_cluster):


 def test_combination1(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_tables_status=1000,
        node_2_sleep_in_send_tables_status=1000,
@ -199,6 +208,9 @@ def test_combination1(started_cluster):


 def test_combination2(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_data=sleep_time,
        node_2_sleep_in_send_tables_status=1000,
@ -210,6 +222,9 @@ def test_combination2(started_cluster):


 def test_query_with_no_data_to_sample(started_cluster):
+    if NODES["node"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    update_configs(
        node_1_sleep_in_send_data=sleep_time, node_2_sleep_in_send_data=sleep_time
    )
--- a/tests/integration/test_secure_socket/test.py
+++ b/tests/integration/test_secure_socket/test.py
@ -58,6 +58,9 @@ def test(started_cluster):
        config.format(sleep_in_send_data_ms=1000000),
    )

+    if NODES["node1"].is_built_with_thread_sanitizer():
+        pytest.skip("Hedged requests don't work under Thread Sanitizer")
+
    attempts = 0
    while attempts < 1000:
        setting = NODES["node2"].http_query(
--- a/tests/performance/join_set_filter.xml
+++ b/tests/performance/join_set_filter.xml
@ -1,45 +0,0 @@
-<test>
-    <substitutions>
-       <substitution>
-           <name>table_size</name>
-           <values>
-               <value>100000000</value>
-           </values>
-       </substitution>
-    </substitutions>
-
-    <settings>
-        <join_algorithm>full_sorting_merge</join_algorithm>
-    </settings>
-
-    <create_query>
-        CREATE TABLE t1 (x UInt64, y UInt64) ENGINE = MergeTree ORDER BY y
-        AS SELECT
-            sipHash64(number, 't1_x') % {table_size} AS x,
-            sipHash64(number, 't1_y') % {table_size} AS y
-        FROM numbers({table_size})
-    </create_query>
-
-    <create_query>
-        CREATE TABLE t2 (x UInt64, y UInt64) ENGINE = MergeTree ORDER BY y
-        AS SELECT
-            sipHash64(number, 't2_x') % {table_size} AS x,
-            sipHash64(number, 't2_y') % {table_size} AS y
-        FROM numbers({table_size})
-    </create_query>
-
-    <query>SELECT * FROM t1 JOIN t2 ON t1.x = t2.x WHERE less(t1.y, 10000)</query>
-    <query>SELECT * FROM t2 JOIN t1 ON t1.x = t2.x WHERE less(t1.y, 10000)</query>
-
-    <query>SELECT * FROM t1 JOIN t2 ON t1.x = t2.x WHERE greater(t1.y, {table_size} - 10000)</query>
-    <query>SELECT * FROM t2 JOIN t1 ON t1.x = t2.x WHERE greater(t1.y, {table_size} - 10000)</query>
-
-    <query>SELECT * FROM t1 JOIN t2 ON t1.x = t2.x WHERE t1.y % 100 = 0</query>
-    <query>SELECT * FROM t2 JOIN t1 ON t1.x = t2.x WHERE t1.y % 100 = 0</query>
-
-    <query>SELECT * FROM t1 JOIN t2 ON t1.x = t2.x WHERE t1.y % 1000 = 0</query>
-    <query>SELECT * FROM t2 JOIN t1 ON t1.x = t2.x WHERE t1.y % 1000 = 0</query>
-
-    <drop_query>DROP TABLE IF EXISTS t1</drop_query>
-    <drop_query>DROP TABLE IF EXISTS t2</drop_query>
-</test>
--- a/tests/queries/0_stateless/00900_orc_load.sh
+++ b/tests/queries/0_stateless/00900_orc_load.sh
@ -12,6 +12,6 @@ ${CLICKHOUSE_CLIENT} --query="select * from orc_load FORMAT ORC" > "${CLICKHOUSE
 ${CLICKHOUSE_CLIENT} --query="truncate table orc_load"

 cat "${CLICKHOUSE_TMP}"/test.orc | ${CLICKHOUSE_CLIENT} -q "insert into orc_load format ORC"
-timeout 3 ${CLICKHOUSE_CLIENT} -q "insert into orc_load format ORC" < "${CLICKHOUSE_TMP}"/test.orc
+${CLICKHOUSE_CLIENT} -q "insert into orc_load format ORC" < "${CLICKHOUSE_TMP}"/test.orc
 ${CLICKHOUSE_CLIENT} --query="select * from orc_load"
 ${CLICKHOUSE_CLIENT} --query="drop table orc_load"
--- a/tests/queries/0_stateless/01320_create_sync_race_condition_zookeeper.sh
+++ b/tests/queries/0_stateless/01320_create_sync_race_condition_zookeeper.sh
@ -12,7 +12,10 @@ $CLICKHOUSE_CLIENT --allow_deprecated_database_ordinary=1 --query "CREATE DATABA

 function thread1()
 {
-    while true; do $CLICKHOUSE_CLIENT -n --query "CREATE TABLE test_01320.r (x UInt64) ENGINE = ReplicatedMergeTree('/test/$CLICKHOUSE_TEST_ZOOKEEPER_PREFIX/table', 'r') ORDER BY x; DROP TABLE test_01320.r;"; done
+    while true; do
+        $CLICKHOUSE_CLIENT -n --query "CREATE TABLE test_01320.r (x UInt64) ENGINE = ReplicatedMergeTree('/test/$CLICKHOUSE_TEST_ZOOKEEPER_PREFIX/table', 'r') ORDER BY x;
+        DROP TABLE test_01320.r;" 2>&1 | grep -F "Code:" | grep -v "UNKNOWN_DATABASE"
+    done
 }

 function thread2()
--- a/tests/queries/0_stateless/01361_fover_remote_num_tries.sh
+++ b/tests/queries/0_stateless/01361_fover_remote_num_tries.sh
@ -5,4 +5,4 @@ CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 # shellcheck source=../shell_config.sh
 . "$CURDIR"/../shell_config.sh

-$CLICKHOUSE_CLIENT --connections_with_failover_max_tries 10 --query "SELECT hostName() FROM remote('128.1.2.3', default.tmp)" 2>&1 | grep -o -P 'Timeout exceeded while connecting to socket|Network is unreachable' | wc -l
+$CLICKHOUSE_CLIENT --connections_with_failover_max_tries 10 --query "SELECT hostName() FROM remote('128.1.2.3', default.tmp)" 2>&1 | grep -o -P 'Timeout exceeded while connecting to socket|Network is unreachable|Timeout: connect timed out' | wc -l
--- a/tests/queries/0_stateless/01851_hedged_connections_external_tables.sql
+++ b/tests/queries/0_stateless/01851_hedged_connections_external_tables.sql
@ -1 +1,2 @@
+-- Tags: no-tsan
 select number from remote('127.0.0.{3|2}', numbers(2)) where number global in (select number from numbers(1))　settings async_socket_for_remote=1, use_hedged_requests = 1, sleep_in_send_data_ms=10, receive_data_timeout_ms=1;
--- a/tests/queries/0_stateless/01956_skip_unavailable_shards_excessive_attempts.reference
+++ b/tests/queries/0_stateless/01956_skip_unavailable_shards_excessive_attempts.reference
@ -1,10 +1,10 @@
 255.255.255.255
-HedgedConnectionsFactory: Connection failed at try №1
+ConnectionPoolWithFailover: Connection failed at try №1
 executeQuery: Code: 519.: All attempts to get table structure failed.
 127.2,255.255.255.255
 0
-HedgedConnectionsFactory: Connection failed at try №1
+ConnectionPoolWithFailover: Connection failed at try №1
 255.255.255.255,127.2
 0
-HedgedConnectionsFactory: Connection failed at try №1
-HedgedConnectionsFactory: Connection failed at try №1
+ConnectionPoolWithFailover: Connection failed at try №1
+ConnectionPoolWithFailover: Connection failed at try №1
--- a/tests/queries/0_stateless/01956_skip_unavailable_shards_excessive_attempts.sh
+++ b/tests/queries/0_stateless/01956_skip_unavailable_shards_excessive_attempts.sh
@ -25,7 +25,7 @@ function execute_query()
    #   clickhouse-client 2> >(wc -l)
    #
    # May dump output of "wc -l" after some other programs.
-    $CLICKHOUSE_CLIENT "${opts[@]}" --query "select * from remote('$hosts', system.one)" 2>"$stderr"
+    $CLICKHOUSE_CLIENT "${opts[@]}" --query "select * from remote('$hosts', system.one) settings use_hedged_requests=0" 2>"$stderr"
    process_log_safe "$stderr"
 }
 execute_query 255.255.255.255
--- a/tests/queries/0_stateless/02117_show_create_table_system.reference
+++ b/tests/queries/0_stateless/02117_show_create_table_system.reference
@ -565,6 +565,7 @@ CREATE TABLE system.parts_columns
    `column_data_compressed_bytes` UInt64,
    `column_data_uncompressed_bytes` UInt64,
    `column_marks_bytes` UInt64,
+    `column_modification_time` Nullable(DateTime),
    `serialization_kind` String,
    `subcolumns.names` Array(String),
    `subcolumns.types` Array(String),
@ -750,6 +751,7 @@ CREATE TABLE system.projection_parts_columns
    `column_data_compressed_bytes` UInt64,
    `column_data_uncompressed_bytes` UInt64,
    `column_marks_bytes` UInt64,
+    `column_modification_time` Nullable(DateTime),
    `bytes` UInt64,
    `marks_size` UInt64,
    `part_name` String
--- a/tests/queries/0_stateless/02226_parallel_reading_from_replicas_benchmark.sh
+++ b/tests/queries/0_stateless/02226_parallel_reading_from_replicas_benchmark.sh
@ -17,6 +17,8 @@ opts=(
    --allow_experimental_parallel_reading_from_replicas 1
    --parallel_replicas_for_non_replicated_merge_tree 1
    --max_parallel_replicas 3
+    --use_hedged_requests 0
+    --cluster_for_parallel_replicas parallel_replicas

    --iterations 1
 )
--- a/tests/queries/0_stateless/02302_lc_nullable_string_insert_as_number.reference
+++ b/tests/queries/0_stateless/02302_lc_nullable_string_insert_as_number.reference
@ -0,0 +1,2 @@
+0
+1
--- a/tests/queries/0_stateless/02302_lc_nullable_string_insert_as_number.sql
+++ b/tests/queries/0_stateless/02302_lc_nullable_string_insert_as_number.sql
@ -0,0 +1,11 @@
+DROP TABLE IF EXISTS lc_nullable_string;
+
+CREATE TABLE lc_nullable_string(`c1` LowCardinality(Nullable(String)) DEFAULT CAST(NULL, 'LowCardinality(Nullable(String))')) 
+ENGINE = Memory;
+
+INSERT INTO lc_nullable_string (c1) FORMAT Values (0);
+INSERT INTO lc_nullable_string (c1) Values (1);
+
+SELECT * FROM lc_nullable_string ORDER BY c1;
+
+DROP TABLE lc_nullable_string;
--- a/tests/queries/0_stateless/02344_describe_cache.reference
+++ b/tests/queries/0_stateless/02344_describe_cache.reference
@ -1,2 +1,2 @@
-134217728	10000000	8388608	1	0	0	0	/var/lib/clickhouse/caches/s3_cache/
-134217728	10000000	104857600	0	0	0	0	/var/lib/clickhouse/caches/s3_cache_2/
+134217728	10000000	33554432	4194304	1	0	0	0	/var/lib/clickhouse/caches/s3_cache/	100	2	0
+134217728	10000000	104857600	4194304	0	0	0	0	/var/lib/clickhouse/caches/s3_cache_2/	100	2	0
--- a/Show More
+++ b/Show More