greenplumn CLogicalInnerApply 源码

greenplumn CLogicalInnerApply 代码

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

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright 2011 EMC Corp.
//
//	@filename:
//		CLogicalInnerApply.h
//
//	@doc:
//		Logical Inner Apply operator
//---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalInnerApply_H
#define GPOPT_CLogicalInnerApply_H

#include "gpos/base.h"

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

namespace gpopt
{
//---------------------------------------------------------------------------
//	@class:
//		CLogicalInnerApply
//
//	@doc:
//		Logical Apply operator used in scalar subquery transformations
//
//---------------------------------------------------------------------------
class CLogicalInnerApply : public CLogicalApply
{
private:
public:
	CLogicalInnerApply(const CLogicalInnerApply &) = delete;

	// ctor for patterns
	explicit CLogicalInnerApply(CMemoryPool *mp);

	// ctor
	CLogicalInnerApply(CMemoryPool *mp, CColRefArray *pdrgpcrInner,
					   EOperatorId eopidOriginSubq);

	// dtor
	~CLogicalInnerApply() override;

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

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

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

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

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

		return PcrsDeriveOutputCombineLogical(mp, exprhdl);
	}

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

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

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

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

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

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

	// conversion function
	static CLogicalInnerApply *
	PopConvert(COperator *pop)
	{
		GPOS_ASSERT(nullptr != pop);
		GPOS_ASSERT(EopLogicalInnerApply == pop->Eopid());

		return dynamic_cast<CLogicalInnerApply *>(pop);
	}

};	// class CLogicalInnerApply

}  // namespace gpopt


#endif	// !GPOPT_CLogicalInnerApply_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