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SerializationArray.h
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92 lines (71 loc) · 4.17 KB
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#pragma once
#include <DataTypes/Serializations/SimpleTextSerialization.h>
namespace DB
{
class SerializationArray final : public SimpleTextSerialization
{
private:
SerializationPtr nested;
public:
explicit SerializationArray(const SerializationPtr & nested_) : nested(nested_) {}
void serializeBinary(const Field & field, WriteBuffer & ostr, const FormatSettings & settings) const override;
void deserializeBinary(Field & field, ReadBuffer & istr, const FormatSettings & settings) const override;
void serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const override;
void deserializeBinary(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const override;
void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings &, bool whole) const override;
bool tryDeserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings &, bool whole) const override;
void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
bool tryDeserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
void serializeTextJSONPretty(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings, size_t indent) const override;
void serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
bool tryDeserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
/** Streaming serialization of arrays is arranged in a special way:
* - elements placed in a row are written/read without array sizes;
* - the sizes are written/read in a separate stream,
* This is necessary, because when implementing nested structures, several arrays can have common sizes.
*/
void enumerateStreams(
EnumerateStreamsSettings & settings,
const StreamCallback & callback,
const SubstreamData & data) const override;
void serializeBinaryBulkStatePrefix(
const IColumn & column,
SerializeBinaryBulkSettings & settings,
SerializeBinaryBulkStatePtr & state) const override;
void serializeBinaryBulkStateSuffix(
SerializeBinaryBulkSettings & settings,
SerializeBinaryBulkStatePtr & state) const override;
void deserializeBinaryBulkStatePrefix(
DeserializeBinaryBulkSettings & settings,
DeserializeBinaryBulkStatePtr & state,
SubstreamsDeserializeStatesCache * cache) const override;
void serializeBinaryBulkWithMultipleStreams(
const IColumn & column,
size_t offset,
size_t limit,
SerializeBinaryBulkSettings & settings,
SerializeBinaryBulkStatePtr & state) const override;
void deserializeBinaryBulkWithMultipleStreams(
ColumnPtr & column,
size_t rows_offset,
size_t limit,
DeserializeBinaryBulkSettings & settings,
DeserializeBinaryBulkStatePtr & state,
SubstreamsCache * cache) const override;
struct SubcolumnCreator : public ISubcolumnCreator
{
const ColumnPtr offsets;
explicit SubcolumnCreator(const ColumnPtr & offsets_) : offsets(offsets_) {}
DataTypePtr create(const DataTypePtr & prev) const override;
SerializationPtr create(const SerializationPtr & prev, const DataTypePtr &) const override;
ColumnPtr create(const ColumnPtr & prev) const override;
};
private:
template <typename ReturnType>
ReturnType deserializeTextJSONImpl(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const;
};
}