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#pragma once
#include <Core/Block.h>
#include <IO/WriteBuffer.h>
#include <Processors/Formats/Impl/JSONEachRowRowOutputFormat.h>
#include <Formats/FormatSettings.h>
namespace DB
{
/* Outputs data as a single JSON Object with rows as fields:
* {
* "row_1": {"num": 42, "str": "hello", "arr": [0,1]},
* "row_2": {"num": 43, "str": "hello", "arr": [0,1,2]},
* "row_3": {"num": 44, "str": "hello", "arr": [0,1,2,3]},
* }
*/
class JSONObjectEachRowRowOutputFormat : public JSONEachRowRowOutputFormat
{
public:
JSONObjectEachRowRowOutputFormat(
WriteBuffer & out_,
const Block & header_,
const FormatSettings & settings_);
String getName() const override { return "JSONObjectEachRowRowOutputFormat"; }
private:
void write(const Columns & columns, size_t row) override;
void writeField(const IColumn & column, const ISerialization & serialization, size_t row) override;
void writeFieldDelimiter() override;
void writeRowStartDelimiter() override;
void writeRowEndDelimiter() override;
void writeRowBetweenDelimiter() override;
void writePrefix() override;
void writeSuffix() override;
std::optional<size_t> field_index_for_object_name;
String object_name;
size_t rows = 0;
};
}
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