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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