greenplumn CLogicalLeftAntiSemiApply 源码

  • 2022-08-18
  • 浏览 (495)

greenplumn CLogicalLeftAntiSemiApply 代码

文件路径:/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalLeftAntiSemiApply.h

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright 2011 EMC Corp.
//
//	@filename:
//		CLogicalLeftAntiSemiApply.h
//
//	@doc:
//		Logical Left Anti Semi Apply operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalLeftAntiSemiApply_H
#define GPOPT_CLogicalLeftAntiSemiApply_H

#include "gpos/base.h"

#include "gpopt/operators/CExpressionHandle.h"
#include "gpopt/operators/CLogicalApply.h"

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CLogicalLeftAntiSemiApply
//
//	@doc:
//		Logical Left Anti Semi Apply operator
//
//---------------------------------------------------------------------------
class CLogicalLeftAntiSemiApply : public CLogicalApply
{
private:
public:
	CLogicalLeftAntiSemiApply(const CLogicalLeftAntiSemiApply &) = delete;

	// ctor
	explicit CLogicalLeftAntiSemiApply(CMemoryPool *mp) : CLogicalApply(mp)
	{
	}

	// ctor
	CLogicalLeftAntiSemiApply(CMemoryPool *mp, CColRefArray *pdrgpcrInner,
							  EOperatorId eopidOriginSubq)
		: CLogicalApply(mp, pdrgpcrInner, eopidOriginSubq)
	{
	}

	// dtor
	~CLogicalLeftAntiSemiApply() override = default;

	// ident accessors
	EOperatorId
	Eopid() const override
	{
		return EopLogicalLeftAntiSemiApply;
	}

	// return a string for operator name
	const CHAR *
	SzId() const override
	{
		return "CLogicalLeftAntiSemiApply";
	}

	// return true if we can pull projections up past this operator from its given child
	BOOL
	FCanPullProjectionsUp(ULONG child_index) const override
	{
		return (0 == child_index);
	}

	//-------------------------------------------------------------------------------------
	// Derived Relational Properties
	//-------------------------------------------------------------------------------------

	// derive output columns
	CColRefSet *
	DeriveOutputColumns(CMemoryPool *,	// mp
						CExpressionHandle &exprhdl) override
	{
		GPOS_ASSERT(3 == exprhdl.Arity());

		return PcrsDeriveOutputPassThru(exprhdl);
	}

	// derive not nullable output columns
	CColRefSet *
	DeriveNotNullColumns(CMemoryPool *,	 // mp
						 CExpressionHandle &exprhdl) const override
	{
		return PcrsDeriveNotNullPassThruOuter(exprhdl);
	}

	// dervive keys
	CKeyCollection *DeriveKeyCollection(
		CMemoryPool *mp, CExpressionHandle &exprhdl) const override;

	// derive max card
	CMaxCard DeriveMaxCard(CMemoryPool *mp,
						   CExpressionHandle &exprhdl) const override;

	// derive constraint property
	CPropConstraint *
	DerivePropertyConstraint(CMemoryPool *,	 //mp,
							 CExpressionHandle &exprhdl) const override
	{
		return PpcDeriveConstraintPassThru(exprhdl, 0 /*ulChild*/);
	}

	//-------------------------------------------------------------------------------------
	// Transformations
	//-------------------------------------------------------------------------------------

	// candidate set of xforms
	CXformSet *PxfsCandidates(CMemoryPool *mp) const override;

	//-------------------------------------------------------------------------------------
	//-------------------------------------------------------------------------------------
	//-------------------------------------------------------------------------------------

	// return true if operator is a left anti semi apply
	BOOL
	FLeftAntiSemiApply() const override
	{
		return true;
	}

	// return a copy of the operator with remapped columns
	COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
										  UlongToColRefMap *colref_mapping,
										  BOOL must_exist) override;

	// conversion function
	static CLogicalLeftAntiSemiApply *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(nullptr != pop);
		GPOS_ASSERT(CUtils::FLeftAntiSemiApply(pop));

		return dynamic_cast<CLogicalLeftAntiSemiApply *>(pop);
	}

};	// class CLogicalLeftAntiSemiApply

}  // namespace gpopt


#endif	// !GPOPT_CLogicalLeftAntiSemiApply_H

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CExpression 源码

greenplumn CExpressionFactorizer 源码

greenplumn CExpressionHandle 源码

greenplumn CExpressionPreprocessor 源码

greenplumn CExpressionUtils 源码

greenplumn CHashedDistributions 源码

greenplumn CLogical 源码

greenplumn CLogicalApply 源码

greenplumn CLogicalAssert 源码

greenplumn CLogicalBitmapTableGet 源码

0  赞