ClickHouse/dbms/include/DB/DataStreams/InputStreamFromASTInsertQuery.h

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#pragma once
#include <DB/Parsers/ASTInsertQuery.h>
#include <DB/Interpreters/Context.h>
#include <DB/IO/ConcatReadBuffer.h>
#include <DB/DataStreams/IProfilingBlockInputStream.h>
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#include <DB/DataStreams/BlockIO.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
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/** Prepares an input stream which produce data containing in INSERT query
* Head of inserting data could be stored in INSERT ast directly
* Remaining (tail) data could be stored in input_buffer_tail_part
*/
class InputStreamFromASTInsertQuery : public IProfilingBlockInputStream
{
public:
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InputStreamFromASTInsertQuery(const ASTPtr & ast, ReadBuffer & input_buffer_tail_part, const BlockIO & streams, Context & context);
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Block readImpl() override { return res_stream->read(); }
void readPrefixImpl() override { return res_stream->readPrefix(); }
void readSuffixImpl() override { return res_stream->readSuffix(); }
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String getName() const override { return "InputStreamFromASTInsertQuery"; }
String getID() const override { return "InputStreamFromASTInsertQuery(" + toString(this) + ")"; }
private:
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std::unique_ptr<ReadBuffer> input_buffer_ast_part;
std::unique_ptr<ReadBuffer> input_buffer_contacenated;
BlockInputStreamPtr res_stream;
};
}