mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-19 12:52:37 +00:00
1480 lines
42 KiB
C++
1480 lines
42 KiB
C++
#include <Core/Defines.h>
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#include <Common/hex.h>
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#include <Common/PODArray.h>
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#include <Common/StringUtils/StringUtils.h>
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#include <Common/memcpySmall.h>
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#include <Formats/FormatSettings.h>
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#include <IO/WriteBufferFromString.h>
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#include <IO/BufferWithOwnMemory.h>
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#include <IO/readFloatText.h>
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#include <IO/Operators.h>
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#include <base/find_symbols.h>
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#include <cstdlib>
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#ifdef __SSE2__
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#include <emmintrin.h>
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#endif
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#if defined(__aarch64__) && defined(__ARM_NEON)
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# include <arm_neon.h>
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# ifdef HAS_RESERVED_IDENTIFIER
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# pragma clang diagnostic ignored "-Wreserved-identifier"
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# endif
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#endif
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int CANNOT_PARSE_INPUT_ASSERTION_FAILED;
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extern const int CANNOT_PARSE_ESCAPE_SEQUENCE;
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extern const int CANNOT_PARSE_QUOTED_STRING;
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extern const int CANNOT_PARSE_DATETIME;
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extern const int CANNOT_PARSE_DATE;
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extern const int INCORRECT_DATA;
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extern const int ATTEMPT_TO_READ_AFTER_EOF;
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}
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template <typename IteratorSrc, typename IteratorDst>
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void parseHex(IteratorSrc src, IteratorDst dst, const size_t num_bytes)
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{
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size_t src_pos = 0;
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size_t dst_pos = 0;
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for (; dst_pos < num_bytes; ++dst_pos, src_pos += 2)
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dst[dst_pos] = unhex2(reinterpret_cast<const char *>(&src[src_pos]));
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}
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void parseUUID(const UInt8 * src36, UInt8 * dst16)
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{
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/// If string is not like UUID - implementation specific behaviour.
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parseHex(&src36[0], &dst16[0], 4);
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parseHex(&src36[9], &dst16[4], 2);
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parseHex(&src36[14], &dst16[6], 2);
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parseHex(&src36[19], &dst16[8], 2);
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parseHex(&src36[24], &dst16[10], 6);
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}
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void parseUUIDWithoutSeparator(const UInt8 * src36, UInt8 * dst16)
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{
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/// If string is not like UUID - implementation specific behaviour.
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parseHex(&src36[0], &dst16[0], 16);
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}
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/** Function used when byte ordering is important when parsing uuid
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* ex: When we create an UUID type
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*/
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void parseUUID(const UInt8 * src36, std::reverse_iterator<UInt8 *> dst16)
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{
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/// If string is not like UUID - implementation specific behaviour.
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/// FIXME This code looks like trash.
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parseHex(&src36[0], dst16 + 8, 4);
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parseHex(&src36[9], dst16 + 12, 2);
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parseHex(&src36[14], dst16 + 14, 2);
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parseHex(&src36[19], dst16, 2);
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parseHex(&src36[24], dst16 + 2, 6);
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}
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/** Function used when byte ordering is important when parsing uuid
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* ex: When we create an UUID type
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*/
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void parseUUIDWithoutSeparator(const UInt8 * src36, std::reverse_iterator<UInt8 *> dst16)
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{
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/// If string is not like UUID - implementation specific behaviour.
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parseHex(&src36[0], dst16 + 8, 8);
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parseHex(&src36[16], dst16, 8);
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}
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void NO_INLINE throwAtAssertionFailed(const char * s, ReadBuffer & buf)
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{
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WriteBufferFromOwnString out;
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out << "Cannot parse input: expected " << quote << s;
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if (buf.eof())
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out << " at end of stream.";
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else
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out << " before: " << quote << String(buf.position(), std::min(SHOW_CHARS_ON_SYNTAX_ERROR, buf.buffer().end() - buf.position()));
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throw ParsingException(out.str(), ErrorCodes::CANNOT_PARSE_INPUT_ASSERTION_FAILED);
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}
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bool checkString(const char * s, ReadBuffer & buf)
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{
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for (; *s; ++s)
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{
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if (buf.eof() || *buf.position() != *s)
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return false;
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++buf.position();
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}
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return true;
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}
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bool checkStringCaseInsensitive(const char * s, ReadBuffer & buf)
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{
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for (; *s; ++s)
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{
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if (buf.eof())
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return false;
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char c = *buf.position();
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if (!equalsCaseInsensitive(*s, c))
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return false;
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++buf.position();
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}
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return true;
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}
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void assertString(const char * s, ReadBuffer & buf)
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{
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if (!checkString(s, buf))
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throwAtAssertionFailed(s, buf);
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}
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void assertEOF(ReadBuffer & buf)
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{
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if (!buf.eof())
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throwAtAssertionFailed("eof", buf);
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}
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void assertNotEOF(ReadBuffer & buf)
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{
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if (buf.eof())
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throw Exception("Attempt to read after EOF", ErrorCodes::ATTEMPT_TO_READ_AFTER_EOF);
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}
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void assertStringCaseInsensitive(const char * s, ReadBuffer & buf)
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{
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if (!checkStringCaseInsensitive(s, buf))
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throwAtAssertionFailed(s, buf);
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}
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bool checkStringByFirstCharacterAndAssertTheRest(const char * s, ReadBuffer & buf)
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{
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if (buf.eof() || *buf.position() != *s)
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return false;
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assertString(s, buf);
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return true;
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}
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bool checkStringByFirstCharacterAndAssertTheRestCaseInsensitive(const char * s, ReadBuffer & buf)
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{
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if (buf.eof())
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return false;
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char c = *buf.position();
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if (!equalsCaseInsensitive(*s, c))
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return false;
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assertStringCaseInsensitive(s, buf);
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return true;
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}
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template <typename T>
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static void appendToStringOrVector(T & s, ReadBuffer & rb, const char * end)
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{
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s.append(rb.position(), end - rb.position());
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}
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template <>
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inline void appendToStringOrVector(PaddedPODArray<UInt8> & s, ReadBuffer & rb, const char * end)
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{
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if (rb.isPadded())
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s.insertSmallAllowReadWriteOverflow15(rb.position(), end);
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else
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s.insert(rb.position(), end);
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}
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template <>
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inline void appendToStringOrVector(PODArray<char> & s, ReadBuffer & rb, const char * end)
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{
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s.insert(rb.position(), end);
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}
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template <char... chars, typename Vector>
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void readStringUntilCharsInto(Vector & s, ReadBuffer & buf)
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{
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while (!buf.eof())
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{
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char * next_pos = find_first_symbols<chars...>(buf.position(), buf.buffer().end());
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appendToStringOrVector(s, buf, next_pos);
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buf.position() = next_pos;
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if (buf.hasPendingData())
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return;
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}
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}
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template <typename Vector>
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void readStringInto(Vector & s, ReadBuffer & buf)
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{
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readStringUntilCharsInto<'\t', '\n'>(s, buf);
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}
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template <typename Vector>
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void readStringUntilWhitespaceInto(Vector & s, ReadBuffer & buf)
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{
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readStringUntilCharsInto<' '>(s, buf);
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}
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template <typename Vector>
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void readStringUntilNewlineInto(Vector & s, ReadBuffer & buf)
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{
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readStringUntilCharsInto<'\n'>(s, buf);
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}
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template void readStringUntilNewlineInto<PaddedPODArray<UInt8>>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
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template void readStringUntilNewlineInto<String>(String & s, ReadBuffer & buf);
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template <typename Vector>
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void readNullTerminated(Vector & s, ReadBuffer & buf)
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{
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readStringUntilCharsInto<'\0'>(s, buf);
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buf.ignore();
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}
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void readStringUntilWhitespace(String & s, ReadBuffer & buf)
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{
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s.clear();
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readStringUntilWhitespaceInto(s, buf);
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}
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template void readNullTerminated<PODArray<char>>(PODArray<char> & s, ReadBuffer & buf);
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template void readNullTerminated<String>(String & s, ReadBuffer & buf);
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void readString(String & s, ReadBuffer & buf)
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{
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s.clear();
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readStringInto(s, buf);
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}
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template void readStringInto<PaddedPODArray<UInt8>>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
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template void readStringInto<String>(String & s, ReadBuffer & buf);
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template void readStringInto<NullOutput>(NullOutput & s, ReadBuffer & buf);
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template <typename Vector>
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void readStringUntilEOFInto(Vector & s, ReadBuffer & buf)
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{
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while (!buf.eof())
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{
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appendToStringOrVector(s, buf, buf.buffer().end());
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buf.position() = buf.buffer().end();
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}
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}
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void readStringUntilEOF(String & s, ReadBuffer & buf)
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{
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s.clear();
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readStringUntilEOFInto(s, buf);
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}
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template <typename Vector>
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void readEscapedStringUntilEOLInto(Vector & s, ReadBuffer & buf)
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{
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while (!buf.eof())
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{
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char * next_pos = find_first_symbols<'\n', '\\'>(buf.position(), buf.buffer().end());
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appendToStringOrVector(s, buf, next_pos);
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buf.position() = next_pos;
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if (!buf.hasPendingData())
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continue;
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if (*buf.position() == '\n')
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return;
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if (*buf.position() == '\\')
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parseComplexEscapeSequence(s, buf);
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}
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}
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void readEscapedStringUntilEOL(String & s, ReadBuffer & buf)
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{
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s.clear();
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readEscapedStringUntilEOLInto(s, buf);
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}
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template void readStringUntilEOFInto<PaddedPODArray<UInt8>>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
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/** Parse the escape sequence, which can be simple (one character after backslash) or more complex (multiple characters).
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* It is assumed that the cursor is located on the `\` symbol
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*/
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template <typename Vector>
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static void parseComplexEscapeSequence(Vector & s, ReadBuffer & buf)
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{
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++buf.position();
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if (buf.eof())
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throw Exception("Cannot parse escape sequence", ErrorCodes::CANNOT_PARSE_ESCAPE_SEQUENCE);
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char char_after_backslash = *buf.position();
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if (char_after_backslash == 'x')
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{
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++buf.position();
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/// escape sequence of the form \xAA
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char hex_code[2];
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readPODBinary(hex_code, buf);
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s.push_back(unhex2(hex_code));
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}
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else if (char_after_backslash == 'N')
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{
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/// Support for NULLs: \N sequence must be parsed as empty string.
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++buf.position();
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}
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else
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{
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/// The usual escape sequence of a single character.
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char decoded_char = parseEscapeSequence(char_after_backslash);
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/// For convenience using LIKE and regular expressions,
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/// we leave backslash when user write something like 'Hello 100\%':
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/// it is parsed like Hello 100\% instead of Hello 100%
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if (decoded_char != '\\'
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&& decoded_char != '\''
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&& decoded_char != '"'
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&& decoded_char != '`' /// MySQL style identifiers
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&& decoded_char != '/' /// JavaScript in HTML
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&& decoded_char != '=' /// TSKV format invented somewhere
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&& !isControlASCII(decoded_char))
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{
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s.push_back('\\');
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}
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s.push_back(decoded_char);
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++buf.position();
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}
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}
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template <typename Vector, typename ReturnType>
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static ReturnType parseJSONEscapeSequence(Vector & s, ReadBuffer & buf)
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{
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static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
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auto error = [](const char * message [[maybe_unused]], int code [[maybe_unused]])
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{
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if constexpr (throw_exception)
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throw Exception(message, code);
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return ReturnType(false);
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};
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++buf.position();
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if (buf.eof())
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return error("Cannot parse escape sequence", ErrorCodes::CANNOT_PARSE_ESCAPE_SEQUENCE);
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assert(buf.hasPendingData());
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switch (*buf.position())
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{
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case '"':
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s.push_back('"');
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break;
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case '\\':
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s.push_back('\\');
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break;
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case '/':
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s.push_back('/');
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break;
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case 'b':
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s.push_back('\b');
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break;
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case 'f':
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s.push_back('\f');
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break;
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case 'n':
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s.push_back('\n');
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break;
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case 'r':
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s.push_back('\r');
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break;
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case 't':
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s.push_back('\t');
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break;
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case 'u':
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{
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++buf.position();
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char hex_code[4];
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if (4 != buf.read(hex_code, 4))
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return error("Cannot parse escape sequence: less than four bytes after \\u", ErrorCodes::CANNOT_PARSE_ESCAPE_SEQUENCE);
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/// \u0000 - special case
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if (0 == memcmp(hex_code, "0000", 4))
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{
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s.push_back(0);
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return ReturnType(true);
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}
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UInt16 code_point = unhex4(hex_code);
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if (code_point <= 0x7F)
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{
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s.push_back(code_point);
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}
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else if (code_point <= 0x07FF)
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{
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s.push_back(((code_point >> 6) & 0x1F) | 0xC0);
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s.push_back((code_point & 0x3F) | 0x80);
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}
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else
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{
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/// Surrogate pair.
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if (code_point >= 0xD800 && code_point <= 0xDBFF)
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{
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if (!checkString("\\u", buf))
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return error("Cannot parse escape sequence: missing second part of surrogate pair", ErrorCodes::CANNOT_PARSE_ESCAPE_SEQUENCE);
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char second_hex_code[4];
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if (4 != buf.read(second_hex_code, 4))
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return error("Cannot parse escape sequence: less than four bytes after \\u of second part of surrogate pair",
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ErrorCodes::CANNOT_PARSE_ESCAPE_SEQUENCE);
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UInt16 second_code_point = unhex4(second_hex_code);
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if (second_code_point >= 0xDC00 && second_code_point <= 0xDFFF)
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{
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UInt32 full_code_point = 0x10000 + (code_point - 0xD800) * 1024 + (second_code_point - 0xDC00);
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s.push_back(((full_code_point >> 18) & 0x07) | 0xF0);
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s.push_back(((full_code_point >> 12) & 0x3F) | 0x80);
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s.push_back(((full_code_point >> 6) & 0x3F) | 0x80);
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s.push_back((full_code_point & 0x3F) | 0x80);
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}
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else
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return error("Incorrect surrogate pair of unicode escape sequences in JSON", ErrorCodes::CANNOT_PARSE_ESCAPE_SEQUENCE);
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}
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else
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{
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s.push_back(((code_point >> 12) & 0x0F) | 0xE0);
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s.push_back(((code_point >> 6) & 0x3F) | 0x80);
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s.push_back((code_point & 0x3F) | 0x80);
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}
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}
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return ReturnType(true);
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}
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default:
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s.push_back(*buf.position());
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break;
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}
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++buf.position();
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return ReturnType(true);
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}
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|
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template <typename Vector>
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void readEscapedStringInto(Vector & s, ReadBuffer & buf)
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{
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while (!buf.eof())
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{
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char * next_pos = find_first_symbols<'\t', '\n', '\\'>(buf.position(), buf.buffer().end());
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appendToStringOrVector(s, buf, next_pos);
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buf.position() = next_pos;
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if (!buf.hasPendingData())
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continue;
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if (*buf.position() == '\t' || *buf.position() == '\n')
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return;
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if (*buf.position() == '\\')
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parseComplexEscapeSequence(s, buf);
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}
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}
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void readEscapedString(String & s, ReadBuffer & buf)
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{
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s.clear();
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readEscapedStringInto(s, buf);
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}
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template void readEscapedStringInto<PaddedPODArray<UInt8>>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
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template void readEscapedStringInto<NullOutput>(NullOutput & s, ReadBuffer & buf);
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|
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/** If enable_sql_style_quoting == true,
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* strings like 'abc''def' will be parsed as abc'def.
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* Please note, that even with SQL style quoting enabled,
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* backslash escape sequences are also parsed,
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* that could be slightly confusing.
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*/
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template <char quote, bool enable_sql_style_quoting, typename Vector>
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static void readAnyQuotedStringInto(Vector & s, ReadBuffer & buf)
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{
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if (buf.eof() || *buf.position() != quote)
|
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{
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throw ParsingException(ErrorCodes::CANNOT_PARSE_QUOTED_STRING,
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"Cannot parse quoted string: expected opening quote '{}', got '{}'",
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std::string{quote}, buf.eof() ? "EOF" : std::string{*buf.position()});
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}
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|
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++buf.position();
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|
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while (!buf.eof())
|
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{
|
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char * next_pos = find_first_symbols<'\\', quote>(buf.position(), buf.buffer().end());
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|
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appendToStringOrVector(s, buf, next_pos);
|
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buf.position() = next_pos;
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|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
if (*buf.position() == quote)
|
|
{
|
|
++buf.position();
|
|
|
|
if (enable_sql_style_quoting && !buf.eof() && *buf.position() == quote)
|
|
{
|
|
s.push_back(quote);
|
|
++buf.position();
|
|
continue;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if (*buf.position() == '\\')
|
|
parseComplexEscapeSequence(s, buf);
|
|
}
|
|
|
|
throw ParsingException("Cannot parse quoted string: expected closing quote",
|
|
ErrorCodes::CANNOT_PARSE_QUOTED_STRING);
|
|
}
|
|
|
|
template <bool enable_sql_style_quoting, typename Vector>
|
|
void readQuotedStringInto(Vector & s, ReadBuffer & buf)
|
|
{
|
|
readAnyQuotedStringInto<'\'', enable_sql_style_quoting>(s, buf);
|
|
}
|
|
|
|
template <bool enable_sql_style_quoting, typename Vector>
|
|
void readDoubleQuotedStringInto(Vector & s, ReadBuffer & buf)
|
|
{
|
|
readAnyQuotedStringInto<'"', enable_sql_style_quoting>(s, buf);
|
|
}
|
|
|
|
template <bool enable_sql_style_quoting, typename Vector>
|
|
void readBackQuotedStringInto(Vector & s, ReadBuffer & buf)
|
|
{
|
|
readAnyQuotedStringInto<'`', enable_sql_style_quoting>(s, buf);
|
|
}
|
|
|
|
|
|
void readQuotedString(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readQuotedStringInto<false>(s, buf);
|
|
}
|
|
|
|
void readQuotedStringWithSQLStyle(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readQuotedStringInto<true>(s, buf);
|
|
}
|
|
|
|
|
|
template void readQuotedStringInto<true>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
|
|
template void readQuotedStringInto<true>(String & s, ReadBuffer & buf);
|
|
template void readQuotedStringInto<false>(String & s, ReadBuffer & buf);
|
|
template void readDoubleQuotedStringInto<false>(NullOutput & s, ReadBuffer & buf);
|
|
template void readDoubleQuotedStringInto<false>(String & s, ReadBuffer & buf);
|
|
template void readBackQuotedStringInto<false>(String & s, ReadBuffer & buf);
|
|
|
|
void readDoubleQuotedString(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readDoubleQuotedStringInto<false>(s, buf);
|
|
}
|
|
|
|
void readDoubleQuotedStringWithSQLStyle(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readDoubleQuotedStringInto<true>(s, buf);
|
|
}
|
|
|
|
void readBackQuotedString(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readBackQuotedStringInto<false>(s, buf);
|
|
}
|
|
|
|
void readBackQuotedStringWithSQLStyle(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readBackQuotedStringInto<true>(s, buf);
|
|
}
|
|
|
|
template<typename T>
|
|
concept WithResize = requires (T value)
|
|
{
|
|
{ value.resize(1) };
|
|
{ value.size() } -> std::integral<>;
|
|
};
|
|
|
|
template <typename Vector>
|
|
void readCSVStringInto(Vector & s, ReadBuffer & buf, const FormatSettings::CSV & settings)
|
|
{
|
|
if (buf.eof())
|
|
throwReadAfterEOF();
|
|
|
|
const char delimiter = settings.delimiter;
|
|
const char maybe_quote = *buf.position();
|
|
|
|
/// Emptiness and not even in quotation marks.
|
|
if (maybe_quote == delimiter)
|
|
return;
|
|
|
|
if ((settings.allow_single_quotes && maybe_quote == '\'') || (settings.allow_double_quotes && maybe_quote == '"'))
|
|
{
|
|
++buf.position();
|
|
|
|
/// The quoted case. We are looking for the next quotation mark.
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = reinterpret_cast<char *>(memchr(buf.position(), maybe_quote, buf.buffer().end() - buf.position()));
|
|
|
|
if (nullptr == next_pos)
|
|
next_pos = buf.buffer().end();
|
|
|
|
appendToStringOrVector(s, buf, next_pos);
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
/// Now there is a quotation mark under the cursor. Is there any following?
|
|
++buf.position();
|
|
if (buf.eof())
|
|
return;
|
|
|
|
if (*buf.position() == maybe_quote)
|
|
{
|
|
s.push_back(maybe_quote);
|
|
++buf.position();
|
|
continue;
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/// Unquoted case. Look for delimiter or \r or \n.
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = buf.position();
|
|
|
|
[&]()
|
|
{
|
|
#ifdef __SSE2__
|
|
auto rc = _mm_set1_epi8('\r');
|
|
auto nc = _mm_set1_epi8('\n');
|
|
auto dc = _mm_set1_epi8(delimiter);
|
|
for (; next_pos + 15 < buf.buffer().end(); next_pos += 16)
|
|
{
|
|
__m128i bytes = _mm_loadu_si128(reinterpret_cast<const __m128i *>(next_pos));
|
|
auto eq = _mm_or_si128(_mm_or_si128(_mm_cmpeq_epi8(bytes, rc), _mm_cmpeq_epi8(bytes, nc)), _mm_cmpeq_epi8(bytes, dc));
|
|
uint16_t bit_mask = _mm_movemask_epi8(eq);
|
|
if (bit_mask)
|
|
{
|
|
next_pos += __builtin_ctz(bit_mask);
|
|
return;
|
|
}
|
|
}
|
|
#elif defined(__aarch64__) && defined(__ARM_NEON)
|
|
auto rc = vdupq_n_u8('\r');
|
|
auto nc = vdupq_n_u8('\n');
|
|
auto dc = vdupq_n_u8(delimiter);
|
|
/// Returns a 64 bit mask of nibbles (4 bits for each byte).
|
|
auto get_nibble_mask = [](uint8x16_t input) -> uint64_t
|
|
{ return vget_lane_u64(vreinterpret_u64_u8(vshrn_n_u16(vreinterpretq_u16_u8(input), 4)), 0); };
|
|
for (; next_pos + 15 < buf.buffer().end(); next_pos += 16)
|
|
{
|
|
uint8x16_t bytes = vld1q_u8(reinterpret_cast<const uint8_t *>(next_pos));
|
|
auto eq = vorrq_u8(vorrq_u8(vceqq_u8(bytes, rc), vceqq_u8(bytes, nc)), vceqq_u8(bytes, dc));
|
|
uint64_t bit_mask = get_nibble_mask(eq);
|
|
if (bit_mask)
|
|
{
|
|
next_pos += __builtin_ctzll(bit_mask) >> 2;
|
|
return;
|
|
}
|
|
}
|
|
#endif
|
|
while (next_pos < buf.buffer().end()
|
|
&& *next_pos != delimiter && *next_pos != '\r' && *next_pos != '\n')
|
|
++next_pos;
|
|
}();
|
|
|
|
appendToStringOrVector(s, buf, next_pos);
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
if constexpr (WithResize<Vector>)
|
|
{
|
|
/** CSV format can contain insignificant spaces and tabs.
|
|
* Usually the task of skipping them is for the calling code.
|
|
* But in this case, it will be difficult to do this, so remove the trailing whitespace by ourself.
|
|
*/
|
|
size_t size = s.size();
|
|
while (size > 0 && (s[size - 1] == ' ' || s[size - 1] == '\t'))
|
|
--size;
|
|
|
|
s.resize(size);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
void readCSVString(String & s, ReadBuffer & buf, const FormatSettings::CSV & settings)
|
|
{
|
|
s.clear();
|
|
readCSVStringInto(s, buf, settings);
|
|
}
|
|
|
|
void readCSVField(String & s, ReadBuffer & buf, const FormatSettings::CSV & settings)
|
|
{
|
|
s.clear();
|
|
bool add_quote = false;
|
|
char quote = '\'';
|
|
|
|
if (!buf.eof() && (*buf.position() == '\'' || *buf.position() == '"'))
|
|
{
|
|
quote = *buf.position();
|
|
s.push_back(quote);
|
|
add_quote = true;
|
|
}
|
|
|
|
readCSVStringInto(s, buf, settings);
|
|
|
|
if (add_quote)
|
|
s.push_back(quote);
|
|
}
|
|
|
|
template void readCSVStringInto<PaddedPODArray<UInt8>>(PaddedPODArray<UInt8> & s, ReadBuffer & buf, const FormatSettings::CSV & settings);
|
|
template void readCSVStringInto<NullOutput>(NullOutput & s, ReadBuffer & buf, const FormatSettings::CSV & settings);
|
|
|
|
|
|
template <typename Vector, typename ReturnType>
|
|
ReturnType readJSONStringInto(Vector & s, ReadBuffer & buf)
|
|
{
|
|
static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
|
|
|
|
auto error = [](const char * message [[maybe_unused]], int code [[maybe_unused]])
|
|
{
|
|
if constexpr (throw_exception)
|
|
throw ParsingException(message, code);
|
|
return ReturnType(false);
|
|
};
|
|
|
|
if (buf.eof() || *buf.position() != '"')
|
|
return error("Cannot parse JSON string: expected opening quote", ErrorCodes::CANNOT_PARSE_QUOTED_STRING);
|
|
++buf.position();
|
|
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = find_first_symbols<'\\', '"'>(buf.position(), buf.buffer().end());
|
|
|
|
appendToStringOrVector(s, buf, next_pos);
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
if (*buf.position() == '"')
|
|
{
|
|
++buf.position();
|
|
return ReturnType(true);
|
|
}
|
|
|
|
if (*buf.position() == '\\')
|
|
parseJSONEscapeSequence<Vector, ReturnType>(s, buf);
|
|
}
|
|
|
|
return error("Cannot parse JSON string: expected closing quote", ErrorCodes::CANNOT_PARSE_QUOTED_STRING);
|
|
}
|
|
|
|
void readJSONString(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readJSONStringInto(s, buf);
|
|
}
|
|
|
|
template void readJSONStringInto<PaddedPODArray<UInt8>, void>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
|
|
template bool readJSONStringInto<PaddedPODArray<UInt8>, bool>(PaddedPODArray<UInt8> & s, ReadBuffer & buf);
|
|
template void readJSONStringInto<NullOutput>(NullOutput & s, ReadBuffer & buf);
|
|
template void readJSONStringInto<String>(String & s, ReadBuffer & buf);
|
|
|
|
template <typename Vector, typename ReturnType>
|
|
ReturnType readJSONObjectPossiblyInvalid(Vector & s, ReadBuffer & buf)
|
|
{
|
|
static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
|
|
|
|
auto error = [](const char * message [[maybe_unused]], int code [[maybe_unused]])
|
|
{
|
|
if constexpr (throw_exception)
|
|
throw ParsingException(message, code);
|
|
return ReturnType(false);
|
|
};
|
|
|
|
if (buf.eof() || *buf.position() != '{')
|
|
return error("JSON should start from opening curly bracket", ErrorCodes::INCORRECT_DATA);
|
|
|
|
s.push_back(*buf.position());
|
|
++buf.position();
|
|
|
|
Int64 balance = 1;
|
|
bool quotes = false;
|
|
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = find_first_symbols<'\\', '{', '}', '"'>(buf.position(), buf.buffer().end());
|
|
appendToStringOrVector(s, buf, next_pos);
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
s.push_back(*buf.position());
|
|
|
|
if (*buf.position() == '\\')
|
|
{
|
|
++buf.position();
|
|
if (!buf.eof())
|
|
{
|
|
s.push_back(*buf.position());
|
|
++buf.position();
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (*buf.position() == '"')
|
|
quotes = !quotes;
|
|
else if (!quotes) // can be only '{' or '}'
|
|
balance += *buf.position() == '{' ? 1 : -1;
|
|
|
|
++buf.position();
|
|
|
|
if (balance == 0)
|
|
return ReturnType(true);
|
|
|
|
if (balance < 0)
|
|
break;
|
|
}
|
|
|
|
return error("JSON should have equal number of opening and closing brackets", ErrorCodes::INCORRECT_DATA);
|
|
}
|
|
|
|
template void readJSONObjectPossiblyInvalid<String>(String & s, ReadBuffer & buf);
|
|
|
|
template <typename ReturnType>
|
|
ReturnType readDateTextFallback(LocalDate & date, ReadBuffer & buf)
|
|
{
|
|
static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
|
|
|
|
auto error = []
|
|
{
|
|
if constexpr (throw_exception)
|
|
throw Exception("Cannot parse date: value is too short", ErrorCodes::CANNOT_PARSE_DATE);
|
|
return ReturnType(false);
|
|
};
|
|
|
|
auto append_digit = [&](auto & x)
|
|
{
|
|
if (!buf.eof() && isNumericASCII(*buf.position()))
|
|
{
|
|
x = x * 10 + (*buf.position() - '0');
|
|
++buf.position();
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
};
|
|
|
|
UInt16 year = 0;
|
|
UInt8 month = 0;
|
|
UInt8 day = 0;
|
|
|
|
if (!append_digit(year)
|
|
|| !append_digit(year) // NOLINT
|
|
|| !append_digit(year) // NOLINT
|
|
|| !append_digit(year)) // NOLINT
|
|
return error();
|
|
|
|
if (buf.eof())
|
|
return error();
|
|
|
|
if (isNumericASCII(*buf.position()))
|
|
{
|
|
/// YYYYMMDD
|
|
if (!append_digit(month)
|
|
|| !append_digit(month) // NOLINT
|
|
|| !append_digit(day)
|
|
|| !append_digit(day)) // NOLINT
|
|
return error();
|
|
}
|
|
else
|
|
{
|
|
++buf.position();
|
|
|
|
if (!append_digit(month))
|
|
return error();
|
|
append_digit(month);
|
|
|
|
if (!buf.eof() && !isNumericASCII(*buf.position()))
|
|
++buf.position();
|
|
else
|
|
return error();
|
|
|
|
if (!append_digit(day))
|
|
return error();
|
|
append_digit(day);
|
|
}
|
|
|
|
date = LocalDate(year, month, day);
|
|
return ReturnType(true);
|
|
}
|
|
|
|
template void readDateTextFallback<void>(LocalDate &, ReadBuffer &);
|
|
template bool readDateTextFallback<bool>(LocalDate &, ReadBuffer &);
|
|
|
|
|
|
template <typename ReturnType>
|
|
ReturnType readDateTimeTextFallback(time_t & datetime, ReadBuffer & buf, const DateLUTImpl & date_lut)
|
|
{
|
|
static constexpr bool throw_exception = std::is_same_v<ReturnType, void>;
|
|
|
|
/// YYYY-MM-DD hh:mm:ss
|
|
static constexpr auto date_time_broken_down_length = 19;
|
|
/// YYYY-MM-DD
|
|
static constexpr auto date_broken_down_length = 10;
|
|
|
|
char s[date_time_broken_down_length];
|
|
char * s_pos = s;
|
|
|
|
/** Read characters, that could represent unix timestamp.
|
|
* Only unix timestamp of at least 5 characters is supported.
|
|
* Then look at 5th character. If it is a number - treat whole as unix timestamp.
|
|
* If it is not a number - then parse datetime in YYYY-MM-DD hh:mm:ss or YYYY-MM-DD format.
|
|
*/
|
|
|
|
/// A piece similar to unix timestamp, maybe scaled to subsecond precision.
|
|
while (s_pos < s + date_time_broken_down_length && !buf.eof() && isNumericASCII(*buf.position()))
|
|
{
|
|
*s_pos = *buf.position();
|
|
++s_pos;
|
|
++buf.position();
|
|
}
|
|
|
|
/// 2015-01-01 01:02:03 or 2015-01-01
|
|
if (s_pos == s + 4 && !buf.eof() && !isNumericASCII(*buf.position()))
|
|
{
|
|
const auto already_read_length = s_pos - s;
|
|
const size_t remaining_date_time_size = date_time_broken_down_length - already_read_length;
|
|
const size_t remaining_date_size = date_broken_down_length - already_read_length;
|
|
|
|
size_t size = buf.read(s_pos, remaining_date_time_size);
|
|
if (size != remaining_date_time_size && size != remaining_date_size)
|
|
{
|
|
s_pos[size] = 0;
|
|
|
|
if constexpr (throw_exception)
|
|
throw ParsingException(std::string("Cannot parse datetime ") + s, ErrorCodes::CANNOT_PARSE_DATETIME);
|
|
else
|
|
return false;
|
|
}
|
|
|
|
UInt16 year = (s[0] - '0') * 1000 + (s[1] - '0') * 100 + (s[2] - '0') * 10 + (s[3] - '0');
|
|
UInt8 month = (s[5] - '0') * 10 + (s[6] - '0');
|
|
UInt8 day = (s[8] - '0') * 10 + (s[9] - '0');
|
|
|
|
UInt8 hour = 0;
|
|
UInt8 minute = 0;
|
|
UInt8 second = 0;
|
|
|
|
if (size == remaining_date_time_size)
|
|
{
|
|
hour = (s[11] - '0') * 10 + (s[12] - '0');
|
|
minute = (s[14] - '0') * 10 + (s[15] - '0');
|
|
second = (s[17] - '0') * 10 + (s[18] - '0');
|
|
}
|
|
|
|
if (unlikely(year == 0))
|
|
datetime = 0;
|
|
else
|
|
datetime = date_lut.makeDateTime(year, month, day, hour, minute, second);
|
|
}
|
|
else
|
|
{
|
|
if (s_pos - s >= 5)
|
|
{
|
|
/// Not very efficient.
|
|
datetime = 0;
|
|
for (const char * digit_pos = s; digit_pos < s_pos; ++digit_pos)
|
|
datetime = datetime * 10 + *digit_pos - '0';
|
|
}
|
|
else
|
|
{
|
|
if constexpr (throw_exception)
|
|
throw ParsingException("Cannot parse datetime", ErrorCodes::CANNOT_PARSE_DATETIME);
|
|
else
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return ReturnType(true);
|
|
}
|
|
|
|
template void readDateTimeTextFallback<void>(time_t &, ReadBuffer &, const DateLUTImpl &);
|
|
template bool readDateTimeTextFallback<bool>(time_t &, ReadBuffer &, const DateLUTImpl &);
|
|
|
|
|
|
void skipJSONField(ReadBuffer & buf, const StringRef & name_of_field)
|
|
{
|
|
if (buf.eof())
|
|
throw Exception("Unexpected EOF for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
else if (*buf.position() == '"') /// skip double-quoted string
|
|
{
|
|
NullOutput sink;
|
|
readJSONStringInto(sink, buf);
|
|
}
|
|
else if (isNumericASCII(*buf.position()) || *buf.position() == '-' || *buf.position() == '+' || *buf.position() == '.') /// skip number
|
|
{
|
|
if (*buf.position() == '+')
|
|
++buf.position();
|
|
|
|
double v;
|
|
if (!tryReadFloatText(v, buf))
|
|
throw Exception("Expected a number field for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
}
|
|
else if (*buf.position() == 'n') /// skip null
|
|
{
|
|
assertString("null", buf);
|
|
}
|
|
else if (*buf.position() == 't') /// skip true
|
|
{
|
|
assertString("true", buf);
|
|
}
|
|
else if (*buf.position() == 'f') /// skip false
|
|
{
|
|
assertString("false", buf);
|
|
}
|
|
else if (*buf.position() == '[')
|
|
{
|
|
++buf.position();
|
|
skipWhitespaceIfAny(buf);
|
|
|
|
if (!buf.eof() && *buf.position() == ']') /// skip empty array
|
|
{
|
|
++buf.position();
|
|
return;
|
|
}
|
|
|
|
while (true)
|
|
{
|
|
skipJSONField(buf, name_of_field);
|
|
skipWhitespaceIfAny(buf);
|
|
|
|
if (!buf.eof() && *buf.position() == ',')
|
|
{
|
|
++buf.position();
|
|
skipWhitespaceIfAny(buf);
|
|
}
|
|
else if (!buf.eof() && *buf.position() == ']')
|
|
{
|
|
++buf.position();
|
|
break;
|
|
}
|
|
else
|
|
throw Exception("Unexpected symbol for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
}
|
|
}
|
|
else if (*buf.position() == '{') /// skip whole object
|
|
{
|
|
++buf.position();
|
|
skipWhitespaceIfAny(buf);
|
|
|
|
while (!buf.eof() && *buf.position() != '}')
|
|
{
|
|
// field name
|
|
if (*buf.position() == '"')
|
|
{
|
|
NullOutput sink;
|
|
readJSONStringInto(sink, buf);
|
|
}
|
|
else
|
|
throw Exception("Unexpected symbol for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
|
|
// ':'
|
|
skipWhitespaceIfAny(buf);
|
|
if (buf.eof() || !(*buf.position() == ':'))
|
|
throw Exception("Unexpected symbol for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
++buf.position();
|
|
skipWhitespaceIfAny(buf);
|
|
|
|
skipJSONField(buf, name_of_field);
|
|
skipWhitespaceIfAny(buf);
|
|
|
|
// optional ','
|
|
if (!buf.eof() && *buf.position() == ',')
|
|
{
|
|
++buf.position();
|
|
skipWhitespaceIfAny(buf);
|
|
}
|
|
}
|
|
|
|
if (buf.eof())
|
|
throw Exception("Unexpected EOF for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
++buf.position();
|
|
}
|
|
else
|
|
{
|
|
throw Exception("Unexpected symbol '" + std::string(*buf.position(), 1) + "' for key '" + name_of_field.toString() + "'", ErrorCodes::INCORRECT_DATA);
|
|
}
|
|
}
|
|
|
|
|
|
Exception readException(ReadBuffer & buf, const String & additional_message, bool remote_exception)
|
|
{
|
|
int code = 0;
|
|
String name;
|
|
String message;
|
|
String stack_trace;
|
|
bool has_nested = false; /// Obsolete
|
|
|
|
readBinary(code, buf);
|
|
readBinary(name, buf);
|
|
readBinary(message, buf);
|
|
readBinary(stack_trace, buf);
|
|
readBinary(has_nested, buf);
|
|
|
|
WriteBufferFromOwnString out;
|
|
|
|
if (!additional_message.empty())
|
|
out << additional_message << ". ";
|
|
|
|
if (name != "DB::Exception")
|
|
out << name << ". ";
|
|
|
|
out << message << ".";
|
|
|
|
if (!stack_trace.empty())
|
|
out << " Stack trace:\n\n" << stack_trace;
|
|
|
|
return Exception(out.str(), code, remote_exception);
|
|
}
|
|
|
|
void readAndThrowException(ReadBuffer & buf, const String & additional_message)
|
|
{
|
|
readException(buf, additional_message).rethrow();
|
|
}
|
|
|
|
|
|
void skipToCarriageReturnOrEOF(ReadBuffer & buf)
|
|
{
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = find_first_symbols<'\r'>(buf.position(), buf.buffer().end());
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
if (*buf.position() == '\r')
|
|
{
|
|
++buf.position();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void skipToNextLineOrEOF(ReadBuffer & buf)
|
|
{
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = find_first_symbols<'\n'>(buf.position(), buf.buffer().end());
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
if (*buf.position() == '\n')
|
|
{
|
|
++buf.position();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void skipToUnescapedNextLineOrEOF(ReadBuffer & buf)
|
|
{
|
|
while (!buf.eof())
|
|
{
|
|
char * next_pos = find_first_symbols<'\n', '\\'>(buf.position(), buf.buffer().end());
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
if (*buf.position() == '\n')
|
|
{
|
|
++buf.position();
|
|
return;
|
|
}
|
|
|
|
if (*buf.position() == '\\')
|
|
{
|
|
++buf.position();
|
|
if (buf.eof())
|
|
return;
|
|
|
|
/// Skip escaped character. We do not consider escape sequences with more than one character after backslash (\x01).
|
|
/// It's ok for the purpose of this function, because we are interested only in \n and \\.
|
|
++buf.position();
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
void saveUpToPosition(ReadBuffer & in, Memory<> & memory, char * current)
|
|
{
|
|
assert(current >= in.position());
|
|
assert(current <= in.buffer().end());
|
|
|
|
const size_t old_bytes = memory.size();
|
|
const size_t additional_bytes = current - in.position();
|
|
const size_t new_bytes = old_bytes + additional_bytes;
|
|
|
|
/// There are no new bytes to add to memory.
|
|
/// No need to do extra stuff.
|
|
if (new_bytes == 0)
|
|
return;
|
|
|
|
assert(in.position() + additional_bytes <= in.buffer().end());
|
|
memory.resize(new_bytes);
|
|
memcpy(memory.data() + old_bytes, in.position(), additional_bytes);
|
|
in.position() = current;
|
|
}
|
|
|
|
bool loadAtPosition(ReadBuffer & in, Memory<> & memory, char * & current)
|
|
{
|
|
assert(current <= in.buffer().end());
|
|
|
|
if (current < in.buffer().end())
|
|
return true;
|
|
|
|
saveUpToPosition(in, memory, current);
|
|
|
|
bool loaded_more = !in.eof();
|
|
// A sanity check. Buffer position may be in the beginning of the buffer
|
|
// (normal case), or have some offset from it (AIO).
|
|
assert(in.position() >= in.buffer().begin());
|
|
assert(in.position() <= in.buffer().end());
|
|
current = in.position();
|
|
|
|
return loaded_more;
|
|
}
|
|
|
|
/// Searches for delimiter in input stream and sets buffer position after delimiter (if found) or EOF (if not)
|
|
static void findAndSkipNextDelimiter(PeekableReadBuffer & buf, const String & delimiter)
|
|
{
|
|
if (delimiter.empty())
|
|
return;
|
|
|
|
while (!buf.eof())
|
|
{
|
|
void * pos = memchr(buf.position(), delimiter[0], buf.available());
|
|
if (!pos)
|
|
{
|
|
buf.position() += buf.available();
|
|
continue;
|
|
}
|
|
|
|
buf.position() = static_cast<ReadBuffer::Position>(pos);
|
|
|
|
PeekableReadBufferCheckpoint checkpoint{buf};
|
|
if (checkString(delimiter, buf))
|
|
return;
|
|
|
|
buf.rollbackToCheckpoint();
|
|
++buf.position();
|
|
}
|
|
}
|
|
|
|
void skipToNextRowOrEof(PeekableReadBuffer & buf, const String & row_after_delimiter, const String & row_between_delimiter, bool skip_spaces)
|
|
{
|
|
if (row_after_delimiter.empty())
|
|
{
|
|
findAndSkipNextDelimiter(buf, row_between_delimiter);
|
|
return;
|
|
}
|
|
|
|
while (true)
|
|
{
|
|
findAndSkipNextDelimiter(buf, row_after_delimiter);
|
|
|
|
if (skip_spaces)
|
|
skipWhitespaceIfAny(buf);
|
|
|
|
if (checkString(row_between_delimiter, buf))
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Use PeekableReadBuffer to copy field to string after parsing.
|
|
template <typename Vector, typename ParseFunc>
|
|
static void readParsedValueInto(Vector & s, ReadBuffer & buf, ParseFunc parse_func)
|
|
{
|
|
PeekableReadBuffer peekable_buf(buf);
|
|
peekable_buf.setCheckpoint();
|
|
parse_func(peekable_buf);
|
|
peekable_buf.makeContinuousMemoryFromCheckpointToPos();
|
|
auto * end = peekable_buf.position();
|
|
peekable_buf.rollbackToCheckpoint();
|
|
s.append(peekable_buf.position(), end);
|
|
peekable_buf.position() = end;
|
|
}
|
|
|
|
template <char opening_bracket, char closing_bracket, typename Vector>
|
|
static void readQuotedFieldInBracketsInto(Vector & s, ReadBuffer & buf)
|
|
{
|
|
assertChar(opening_bracket, buf);
|
|
s.push_back(opening_bracket);
|
|
|
|
size_t balance = 1;
|
|
|
|
while (!buf.eof() && balance)
|
|
{
|
|
char * next_pos = find_first_symbols<'\'', opening_bracket, closing_bracket>(buf.position(), buf.buffer().end());
|
|
appendToStringOrVector(s, buf, next_pos);
|
|
buf.position() = next_pos;
|
|
|
|
if (!buf.hasPendingData())
|
|
continue;
|
|
|
|
s.push_back(*buf.position());
|
|
|
|
if (*buf.position() == '\'')
|
|
{
|
|
readQuotedStringInto<false>(s, buf);
|
|
s.push_back('\'');
|
|
}
|
|
else if (*buf.position() == opening_bracket)
|
|
{
|
|
++balance;
|
|
++buf.position();
|
|
}
|
|
else if (*buf.position() == closing_bracket)
|
|
{
|
|
--balance;
|
|
++buf.position();
|
|
}
|
|
}
|
|
}
|
|
|
|
template <typename Vector>
|
|
void readQuotedFieldInto(Vector & s, ReadBuffer & buf)
|
|
{
|
|
if (buf.eof())
|
|
return;
|
|
|
|
/// Possible values in 'Quoted' field:
|
|
/// - Strings: '...'
|
|
/// - Arrays: [...]
|
|
/// - Tuples: (...)
|
|
/// - Maps: {...}
|
|
/// - NULL
|
|
/// - Bool: true/false
|
|
/// - Number: integer, float, decimal.
|
|
|
|
if (*buf.position() == '\'')
|
|
{
|
|
s.push_back('\'');
|
|
readQuotedStringInto<false>(s, buf);
|
|
s.push_back('\'');
|
|
}
|
|
else if (*buf.position() == '[')
|
|
readQuotedFieldInBracketsInto<'[', ']'>(s, buf);
|
|
else if (*buf.position() == '(')
|
|
readQuotedFieldInBracketsInto<'(', ')'>(s, buf);
|
|
else if (*buf.position() == '{')
|
|
readQuotedFieldInBracketsInto<'{', '}'>(s, buf);
|
|
else if (checkCharCaseInsensitive('n', buf))
|
|
{
|
|
/// NULL or NaN
|
|
if (checkCharCaseInsensitive('u', buf))
|
|
{
|
|
assertStringCaseInsensitive("ll", buf);
|
|
s.append("NULL");
|
|
}
|
|
else
|
|
{
|
|
assertStringCaseInsensitive("an", buf);
|
|
s.append("NaN");
|
|
}
|
|
}
|
|
else if (checkCharCaseInsensitive('t', buf))
|
|
{
|
|
assertStringCaseInsensitive("rue", buf);
|
|
s.append("true");
|
|
}
|
|
else if (checkCharCaseInsensitive('f', buf))
|
|
{
|
|
assertStringCaseInsensitive("alse", buf);
|
|
s.append("false");
|
|
}
|
|
else
|
|
{
|
|
/// It's an integer, float or decimal. They all can be parsed as float.
|
|
auto parse_func = [](ReadBuffer & in)
|
|
{
|
|
Float64 tmp;
|
|
readFloatText(tmp, in);
|
|
};
|
|
readParsedValueInto(s, buf, parse_func);
|
|
}
|
|
}
|
|
|
|
template void readQuotedFieldInto<NullOutput>(NullOutput & s, ReadBuffer & buf);
|
|
|
|
void readQuotedField(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
readQuotedFieldInto(s, buf);
|
|
}
|
|
|
|
void readJSONField(String & s, ReadBuffer & buf)
|
|
{
|
|
s.clear();
|
|
auto parse_func = [](ReadBuffer & in) { skipJSONField(in, "json_field"); };
|
|
readParsedValueInto(s, buf, parse_func);
|
|
}
|
|
|
|
}
|