ClickHouse/dbms/Parsers/ASTSelectWithUnionQuery.h

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2018-02-26 10:12:26 +00:00
#pragma once
#include <Parsers/ASTQueryWithOutput.h>
namespace DB
{
/** Single SELECT query or multiple SELECT queries with UNION ALL.
* Only UNION ALL is possible. No UNION DISTINCT or plain UNION.
*/
class ASTSelectWithUnionQuery : public ASTQueryWithOutput
{
public:
String getID(char) const override { return "SelectWithUnionQuery"; }
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ASTPtr clone() const override;
void formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override;
ASTPtr list_of_selects;
};
}