greenplumn CPhysicalLeftAntiSemiNLJoin 代码
文件路径：/src/backend/gporca/libgpopt/src/operators/CPhysicalLeftAntiSemiNLJoin.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ CPhysicalLeftAntiSemiNLJoin.cpp
/
/ @doc:
/ Implementation of left anti semi nested-loops join operator
/---------------------------------------------------------------------------
#include "gpopt/operators/CPhysicalLeftAntiSemiNLJoin.h"
#include "gpos/base.h"
using namespace gpopt;
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalLeftAntiSemiNLJoin::CPhysicalLeftAntiSemiNLJoin
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CPhysicalLeftAntiSemiNLJoin::CPhysicalLeftAntiSemiNLJoin(CMemoryPool *mp)
: CPhysicalNLJoin(mp)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalLeftAntiSemiNLJoin::~CPhysicalLeftAntiSemiNLJoin
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CPhysicalLeftAntiSemiNLJoin::~CPhysicalLeftAntiSemiNLJoin() = default;
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalLeftAntiSemiNLJoin::FProvidesReqdCols
/
/ @doc:
/ Check if required columns are included in output columns
/
/---------------------------------------------------------------------------
BOOL
CPhysicalLeftAntiSemiNLJoin::FProvidesReqdCols(CExpressionHandle &exprhdl,
CColRefSet *pcrsRequired,
ULONG / ulOptReq
) const
{
/ left anti semi join only propagates columns from left child
return FOuterProvidesReqdCols(exprhdl, pcrsRequired);
}
/ EOF
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