greenplumn CXformPushGbBelowUnion 源码
greenplumn CXformPushGbBelowUnion 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformPushGbBelowUnion.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 VMware, Inc. or its affiliates.
//
// @filename:
// CXformPushGbBelowUnion.h
//
// @doc:
// Push grouping below Union operation
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformPushGbBelowUnion_H
#define GPOPT_CXformPushGbBelowUnion_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalUnion.h"
#include "gpopt/xforms/CXformPushGbBelowSetOp.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CXformPushGbBelowUnion
//
// @doc:
// Push grouping below Union operation
//
//---------------------------------------------------------------------------
class CXformPushGbBelowUnion : public CXformPushGbBelowSetOp<CLogicalUnion>
{
private:
public:
CXformPushGbBelowUnion(const CXformPushGbBelowUnion &) = delete;
// ctor
explicit CXformPushGbBelowUnion(CMemoryPool *mp)
: CXformPushGbBelowSetOp<CLogicalUnion>(mp)
{
}
// dtor
~CXformPushGbBelowUnion() override = default;
// Compatibility function
BOOL
FCompatible(CXform::EXformId exfid) override
{
return ExfPushGbBelowUnion != exfid;
}
// ident accessors
EXformId
Exfid() const override
{
return ExfPushGbBelowUnion;
}
const CHAR *
SzId() const override
{
return "CXformPushGbBelowUnion";
}
}; // class CXformPushGbBelowUnion
} // namespace gpopt
#endif // !GPOPT_CXformPushGbBelowUnion_H
// EOF
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