mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-22 07:31:57 +00:00
391 lines
12 KiB
C++
391 lines
12 KiB
C++
#include <Core/Defines.h>
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#include <Columns/ColumnString.h>
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#include <Columns/ColumnsNumber.h>
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#include <Columns/ColumnConst.h>
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#include <Common/typeid_cast.h>
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#include <Common/assert_cast.h>
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#include <Core/Field.h>
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#include <Formats/FormatSettings.h>
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#include <Formats/ProtobufReader.h>
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#include <Formats/ProtobufWriter.h>
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#include <DataTypes/DataTypeString.h>
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#include <DataTypes/DataTypeFactory.h>
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#include <IO/ReadHelpers.h>
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#include <IO/WriteHelpers.h>
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#include <IO/VarInt.h>
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#ifdef __SSE2__
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#include <emmintrin.h>
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#endif
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namespace DB
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{
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void DataTypeString::serializeBinary(const Field & field, WriteBuffer & ostr) const
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{
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const String & s = get<const String &>(field);
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writeVarUInt(s.size(), ostr);
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writeString(s, ostr);
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}
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void DataTypeString::deserializeBinary(Field & field, ReadBuffer & istr) const
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{
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UInt64 size;
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readVarUInt(size, istr);
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field = String();
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String & s = get<String &>(field);
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s.resize(size);
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istr.readStrict(s.data(), size);
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}
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void DataTypeString::serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr) const
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{
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const StringRef & s = assert_cast<const ColumnString &>(column).getDataAt(row_num);
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writeVarUInt(s.size, ostr);
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writeString(s, ostr);
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}
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void DataTypeString::deserializeBinary(IColumn & column, ReadBuffer & istr) const
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{
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ColumnString & column_string = assert_cast<ColumnString &>(column);
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ColumnString::Chars & data = column_string.getChars();
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ColumnString::Offsets & offsets = column_string.getOffsets();
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UInt64 size;
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readVarUInt(size, istr);
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size_t old_chars_size = data.size();
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size_t offset = old_chars_size + size + 1;
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offsets.push_back(offset);
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try
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{
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data.resize(offset);
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istr.readStrict(reinterpret_cast<char*>(&data[offset - size - 1]), size);
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data.back() = 0;
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}
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catch (...)
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{
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offsets.pop_back();
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data.resize_assume_reserved(old_chars_size);
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throw;
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}
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}
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void DataTypeString::serializeBinaryBulk(const IColumn & column, WriteBuffer & ostr, size_t offset, size_t limit) const
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{
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const ColumnString & column_string = typeid_cast<const ColumnString &>(column);
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const ColumnString::Chars & data = column_string.getChars();
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const ColumnString::Offsets & offsets = column_string.getOffsets();
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size_t size = column.size();
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if (!size)
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return;
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size_t end = limit && offset + limit < size
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? offset + limit
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: size;
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if (offset == 0)
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{
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UInt64 str_size = offsets[0] - 1;
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writeVarUInt(str_size, ostr);
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ostr.write(reinterpret_cast<const char *>(data.data()), str_size);
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++offset;
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}
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for (size_t i = offset; i < end; ++i)
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{
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UInt64 str_size = offsets[i] - offsets[i - 1] - 1;
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writeVarUInt(str_size, ostr);
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ostr.write(reinterpret_cast<const char *>(&data[offsets[i - 1]]), str_size);
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}
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}
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template <int UNROLL_TIMES>
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static NO_INLINE void deserializeBinarySSE2(ColumnString::Chars & data, ColumnString::Offsets & offsets, ReadBuffer & istr, size_t limit)
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{
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size_t offset = data.size();
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for (size_t i = 0; i < limit; ++i)
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{
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if (istr.eof())
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break;
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UInt64 size;
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readVarUInt(size, istr);
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offset += size + 1;
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offsets.push_back(offset);
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data.resize(offset);
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if (size)
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{
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#ifdef __SSE2__
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/// An optimistic branch in which more efficient copying is possible.
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if (offset + 16 * UNROLL_TIMES <= data.capacity() && istr.position() + size + 16 * UNROLL_TIMES <= istr.buffer().end())
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{
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const __m128i * sse_src_pos = reinterpret_cast<const __m128i *>(istr.position());
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const __m128i * sse_src_end = sse_src_pos + (size + (16 * UNROLL_TIMES - 1)) / 16 / UNROLL_TIMES * UNROLL_TIMES;
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__m128i * sse_dst_pos = reinterpret_cast<__m128i *>(&data[offset - size - 1]);
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while (sse_src_pos < sse_src_end)
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{
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for (size_t j = 0; j < UNROLL_TIMES; ++j)
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_mm_storeu_si128(sse_dst_pos + j, _mm_loadu_si128(sse_src_pos + j));
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sse_src_pos += UNROLL_TIMES;
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sse_dst_pos += UNROLL_TIMES;
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}
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istr.position() += size;
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}
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else
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#endif
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{
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istr.readStrict(reinterpret_cast<char*>(&data[offset - size - 1]), size);
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}
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}
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data[offset - 1] = 0;
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}
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}
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void DataTypeString::deserializeBinaryBulk(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const
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{
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ColumnString & column_string = typeid_cast<ColumnString &>(column);
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ColumnString::Chars & data = column_string.getChars();
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ColumnString::Offsets & offsets = column_string.getOffsets();
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double avg_chars_size = 1; /// By default reserve only for empty strings.
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if (avg_value_size_hint && avg_value_size_hint > sizeof(offsets[0]))
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{
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/// Randomly selected.
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constexpr auto avg_value_size_hint_reserve_multiplier = 1.2;
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avg_chars_size = (avg_value_size_hint - sizeof(offsets[0])) * avg_value_size_hint_reserve_multiplier;
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}
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size_t size_to_reserve = data.size() + std::ceil(limit * avg_chars_size);
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/// Never reserve for too big size.
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if (size_to_reserve < 256 * 1024 * 1024)
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{
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try
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{
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data.reserve(size_to_reserve);
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}
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catch (Exception & e)
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{
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e.addMessage(
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"(avg_value_size_hint = " + toString(avg_value_size_hint)
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+ ", avg_chars_size = " + toString(avg_chars_size)
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+ ", limit = " + toString(limit) + ")");
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throw;
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}
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}
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offsets.reserve(offsets.size() + limit);
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if (avg_chars_size >= 64)
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deserializeBinarySSE2<4>(data, offsets, istr, limit);
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else if (avg_chars_size >= 48)
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deserializeBinarySSE2<3>(data, offsets, istr, limit);
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else if (avg_chars_size >= 32)
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deserializeBinarySSE2<2>(data, offsets, istr, limit);
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else
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deserializeBinarySSE2<1>(data, offsets, istr, limit);
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}
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void DataTypeString::serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const
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{
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writeString(assert_cast<const ColumnString &>(column).getDataAt(row_num), ostr);
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}
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void DataTypeString::serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const
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{
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writeEscapedString(assert_cast<const ColumnString &>(column).getDataAt(row_num), ostr);
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}
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template <typename Reader>
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static inline void read(IColumn & column, Reader && reader)
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{
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ColumnString & column_string = assert_cast<ColumnString &>(column);
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ColumnString::Chars & data = column_string.getChars();
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ColumnString::Offsets & offsets = column_string.getOffsets();
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size_t old_chars_size = data.size();
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size_t old_offsets_size = offsets.size();
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try
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{
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reader(data);
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data.push_back(0);
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offsets.push_back(data.size());
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}
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catch (...)
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{
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offsets.resize_assume_reserved(old_offsets_size);
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data.resize_assume_reserved(old_chars_size);
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throw;
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}
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}
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void DataTypeString::deserializeWholeText(IColumn & column, ReadBuffer & istr, const FormatSettings &) const
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{
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read(column, [&](ColumnString::Chars & data) { readStringInto(data, istr); });
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}
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void DataTypeString::deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const
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{
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read(column, [&](ColumnString::Chars & data) { readEscapedStringInto(data, istr); });
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}
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void DataTypeString::serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const
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{
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writeQuotedString(assert_cast<const ColumnString &>(column).getDataAt(row_num), ostr);
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}
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void DataTypeString::deserializeTextQuoted(IColumn & column, ReadBuffer & istr, const FormatSettings &) const
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{
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read(column, [&](ColumnString::Chars & data) { readQuotedStringInto<true>(data, istr); });
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}
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void DataTypeString::serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
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{
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writeJSONString(assert_cast<const ColumnString &>(column).getDataAt(row_num), ostr, settings);
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}
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void DataTypeString::deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const
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{
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read(column, [&](ColumnString::Chars & data) { readJSONStringInto(data, istr); });
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}
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void DataTypeString::serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const
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{
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writeXMLString(assert_cast<const ColumnString &>(column).getDataAt(row_num), ostr);
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}
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void DataTypeString::serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const
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{
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writeCSVString<>(assert_cast<const ColumnString &>(column).getDataAt(row_num), ostr);
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}
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void DataTypeString::deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
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{
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read(column, [&](ColumnString::Chars & data) { readCSVStringInto(data, istr, settings.csv); });
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}
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void DataTypeString::serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const
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{
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if (value_index)
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return;
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value_index = static_cast<bool>(protobuf.writeString(assert_cast<const ColumnString &>(column).getDataAt(row_num)));
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}
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void DataTypeString::deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const
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{
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row_added = false;
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auto & column_string = assert_cast<ColumnString &>(column);
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ColumnString::Chars & data = column_string.getChars();
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ColumnString::Offsets & offsets = column_string.getOffsets();
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size_t old_size = offsets.size();
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try
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{
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if (allow_add_row)
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{
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if (protobuf.readStringInto(data))
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{
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data.emplace_back(0);
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offsets.emplace_back(data.size());
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row_added = true;
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}
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else
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data.resize_assume_reserved(offsets.back());
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}
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else
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{
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ColumnString::Chars temp_data;
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if (protobuf.readStringInto(temp_data))
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{
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temp_data.emplace_back(0);
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column_string.popBack(1);
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old_size = offsets.size();
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data.insertSmallAllowReadWriteOverflow15(temp_data.begin(), temp_data.end());
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offsets.emplace_back(data.size());
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}
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}
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}
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catch (...)
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{
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offsets.resize_assume_reserved(old_size);
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data.resize_assume_reserved(offsets.back());
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throw;
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}
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}
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Field DataTypeString::getDefault() const
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{
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return String();
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}
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MutableColumnPtr DataTypeString::createColumn() const
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{
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return ColumnString::create();
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}
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bool DataTypeString::equals(const IDataType & rhs) const
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{
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return typeid(rhs) == typeid(*this);
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}
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void registerDataTypeString(DataTypeFactory & factory)
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{
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auto creator = static_cast<DataTypePtr(*)()>([] { return DataTypePtr(std::make_shared<DataTypeString>()); });
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factory.registerSimpleDataType("String", creator);
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/// These synonyms are added for compatibility.
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factory.registerAlias("CHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("VARCHAR", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("TEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("TINYTEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("MEDIUMTEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("LONGTEXT", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("BLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("TINYBLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("MEDIUMBLOB", "String", DataTypeFactory::CaseInsensitive);
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factory.registerAlias("LONGBLOB", "String", DataTypeFactory::CaseInsensitive);
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}
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}
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