greenplumn CScalarSubqueryExistential 源码

2022-08-18
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greenplumn CScalarSubqueryExistential 代码

文件路径：/src/backend/gporca/libgpopt/src/operators/CScalarSubqueryExistential.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2011 EMC Corp.
//
//	@filename:
//		CScalarSubqueryExistential.cpp
//
//	@doc:
//		Implementation of existential subquery operator
//---------------------------------------------------------------------------

#include "gpopt/operators/CScalarSubqueryExistential.h"

#include "gpos/base.h"

#include "gpopt/base/CColRefSet.h"
#include "gpopt/base/CDrvdPropScalar.h"
#include "gpopt/base/COptCtxt.h"
#include "gpopt/operators/CExpressionHandle.h"
#include "naucrates/md/IMDTypeBool.h"

using namespace gpopt;
using namespace gpmd;

//---------------------------------------------------------------------------
//	@function:
//		CScalarSubqueryExistential::CScalarSubqueryExistential
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CScalarSubqueryExistential::CScalarSubqueryExistential(CMemoryPool *mp)
	: CScalar(mp)
{
}

//---------------------------------------------------------------------------
//	@function:
//		CScalarSubqueryExistential::~CScalarSubqueryExistential
//
//	@doc:
//		Dtor
//
//---------------------------------------------------------------------------
CScalarSubqueryExistential::~CScalarSubqueryExistential() = default;


//---------------------------------------------------------------------------
//	@function:
//		CScalarSubqueryExistential::MdidType
//
//	@doc:
//		Type of scalar's value
//
//---------------------------------------------------------------------------
IMDId *
CScalarSubqueryExistential::MdidType() const
{
	CMDAccessor *md_accessor = COptCtxt::PoctxtFromTLS()->Pmda();
	return md_accessor->PtMDType<IMDTypeBool>()->MDId();
}


//---------------------------------------------------------------------------
//	@function:
//		CScalarSubqueryExistential::Matches
//
//	@doc:
//		Match function on operator level
//
//---------------------------------------------------------------------------
BOOL
CScalarSubqueryExistential::Matches(COperator *pop) const
{
	GPOS_ASSERT(nullptr != pop);

	return pop->Eopid() == Eopid();
}


//---------------------------------------------------------------------------
//	@function:
//		CScalarSubqueryExistential::DerivePartitionInfo
//
//	@doc:
//		Derive partition consumers
//
//---------------------------------------------------------------------------
CPartInfo *
CScalarSubqueryExistential::PpartinfoDerive(CMemoryPool *,	// mp,
											CExpressionHandle &exprhdl) const
{
	CPartInfo *ppartinfoChild = exprhdl.DerivePartitionInfo(0);
	GPOS_ASSERT(nullptr != ppartinfoChild);
	ppartinfoChild->AddRef();
	return ppartinfoChild;
}

// EOF

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