ClickHouse/src/Interpreters/InterpreterDescribeQuery.h
2020-04-03 18:14:31 +03:00

34 lines
579 B
C++

#pragma once
#include <Interpreters/IInterpreter.h>
#include <Parsers/IAST_fwd.h>
namespace DB
{
class Context;
/** Return names, types and other information about columns in specified table.
*/
class InterpreterDescribeQuery : public IInterpreter
{
public:
InterpreterDescribeQuery(const ASTPtr & query_ptr_, const Context & context_)
: query_ptr(query_ptr_), context(context_) {}
BlockIO execute() override;
static Block getSampleBlock();
private:
ASTPtr query_ptr;
const Context & context;
BlockInputStreamPtr executeImpl();
};
}