mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-30 03:22:14 +00:00
40 lines
1.0 KiB
C++
40 lines
1.0 KiB
C++
#pragma once
|
|
|
|
#include <string>
|
|
#include <Core/Block.h>
|
|
#include <DataStreams/IBlockInputStream.h>
|
|
#include <Poco/Data/RecordSet.h>
|
|
#include <Poco/Data/Session.h>
|
|
#include <Poco/Data/Statement.h>
|
|
#include <Core/ExternalResultDescription.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
/// Allows processing results of a query to ODBC source as a sequence of Blocks, simplifies chaining
|
|
class ODBCBlockInputStream final : public IBlockInputStream
|
|
{
|
|
public:
|
|
ODBCBlockInputStream(
|
|
Poco::Data::Session && session_, const std::string & query_str, const Block & sample_block, const UInt64 max_block_size_);
|
|
|
|
String getName() const override { return "ODBC"; }
|
|
|
|
Block getHeader() const override { return description.sample_block.cloneEmpty(); }
|
|
|
|
private:
|
|
Block readImpl() override;
|
|
|
|
Poco::Data::Session session;
|
|
Poco::Data::Statement statement;
|
|
Poco::Data::RecordSet result;
|
|
Poco::Data::RecordSet::Iterator iterator;
|
|
|
|
const UInt64 max_block_size;
|
|
ExternalResultDescription description;
|
|
|
|
Poco::Logger * log;
|
|
};
|
|
|
|
}
|