ClickHouse/dbms/Formats/MySQLBlockInputStream.h
Ivan 97f2a2213e
Move all folders inside /dbms one level up (#9974)
* Move some code outside dbms/src folder
* Fix paths
2020-04-02 02:51:21 +03:00

40 lines
1.0 KiB
C++

#pragma once
#include <string>
#include <Core/Block.h>
#include <DataStreams/IBlockInputStream.h>
#include <mysqlxx/PoolWithFailover.h>
#include <mysqlxx/Query.h>
#include <Core/ExternalResultDescription.h>
namespace DB
{
/// Allows processing results of a MySQL query as a sequence of Blocks, simplifies chaining
class MySQLBlockInputStream final : public IBlockInputStream
{
public:
MySQLBlockInputStream(
const mysqlxx::PoolWithFailover::Entry & entry_,
const std::string & query_str,
const Block & sample_block,
const UInt64 max_block_size_,
const bool auto_close_ = false);
String getName() const override { return "MySQL"; }
Block getHeader() const override { return description.sample_block.cloneEmpty(); }
private:
Block readImpl() override;
mysqlxx::PoolWithFailover::Entry entry;
mysqlxx::Query query;
mysqlxx::UseQueryResult result;
const UInt64 max_block_size;
const bool auto_close;
ExternalResultDescription description;
};
}