greenplumn CXformImplementLeftAntiSemiCorrelatedApply 源码
greenplumn CXformImplementLeftAntiSemiCorrelatedApply 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/xforms/CXformImplementLeftAntiSemiCorrelatedApply.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates..
//
// @filename:
// CXformImplementLeftAntiSemiCorrelatedApply.h
//
// @doc:
// Transform left anti semi correlated apply (for NOT EXISTS subqueries)
// to physical left anti semi correlated join
//---------------------------------------------------------------------------
#ifndef GPOPT_CXformImplementLeftAntiSemiCorrelatedApply_H
#define GPOPT_CXformImplementLeftAntiSemiCorrelatedApply_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalLeftAntiSemiCorrelatedApply.h"
#include "gpopt/operators/CPhysicalCorrelatedLeftAntiSemiNLJoin.h"
#include "gpopt/xforms/CXformImplementCorrelatedApply.h"
namespace gpopt
{
using namespace gpos;
//-------------------------------------------------------------------------
// @class:
// CXformImplementLeftAntiSemiCorrelatedApply
//
// @doc:
// Transform left anti semi correlated apply (for NOT EXISTS subqueries)
// to physical left anti semi correlated join
//
//-------------------------------------------------------------------------
class CXformImplementLeftAntiSemiCorrelatedApply
: public CXformImplementCorrelatedApply<
CLogicalLeftAntiSemiCorrelatedApply,
CPhysicalCorrelatedLeftAntiSemiNLJoin>
{
private:
public:
CXformImplementLeftAntiSemiCorrelatedApply(
const CXformImplementLeftAntiSemiCorrelatedApply &) = delete;
// ctor
explicit CXformImplementLeftAntiSemiCorrelatedApply(CMemoryPool *mp)
: CXformImplementCorrelatedApply<CLogicalLeftAntiSemiCorrelatedApply,
CPhysicalCorrelatedLeftAntiSemiNLJoin>(
mp)
{
}
// dtor
~CXformImplementLeftAntiSemiCorrelatedApply() override = default;
// ident accessors
EXformId
Exfid() const override
{
return ExfImplementLeftAntiSemiCorrelatedApply;
}
const CHAR *
SzId() const override
{
return "CXformImplementLeftAntiSemiCorrelatedApply";
}
}; // class CXformImplementLeftAntiSemiCorrelatedApply
} // namespace gpopt
#endif // !GPOPT_CXformImplementLeftAntiSemiCorrelatedApply_H
// EOF
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