greenplumn CLogicalLeftAntiSemiApply 源码
greenplumn CLogicalLeftAntiSemiApply 代码
文件路径：/src/backend/gporca/libgpopt/src/operators/CLogicalLeftAntiSemiApply.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CLogicalLeftAntiSemiApply.cpp
//
// @doc:
// Implementation of left anti-semi-apply operator
//---------------------------------------------------------------------------
#include "gpopt/operators/CLogicalLeftAntiSemiApply.h"
#include "gpos/base.h"
#include "gpopt/base/CColRefSet.h"
#include "gpopt/operators/CExpression.h"
#include "gpopt/operators/CExpressionHandle.h"
using namespace gpopt;
//---------------------------------------------------------------------------
// @function:
// CLogicalLeftAntiSemiApply::PkcDeriveKeys
//
// @doc:
// Derive key collection
//
//---------------------------------------------------------------------------
CKeyCollection *
CLogicalLeftAntiSemiApply::DeriveKeyCollection(CMemoryPool *, // mp
CExpressionHandle &exprhdl) const
{
return PkcDeriveKeysPassThru(exprhdl, 0 /* ulChild */);
}
//---------------------------------------------------------------------------
// @function:
// CLogicalLeftAntiSemiApply::DeriveMaxCard
//
// @doc:
// Derive max card
//
//---------------------------------------------------------------------------
CMaxCard
CLogicalLeftAntiSemiApply::DeriveMaxCard(CMemoryPool *, // mp
CExpressionHandle &exprhdl) const
{
// pass on max card of first child
return exprhdl.DeriveMaxCard(0);
}
//---------------------------------------------------------------------------
// @function:
// CLogicalLeftAntiSemiApply::PxfsCandidates
//
// @doc:
// Get candidate xforms
//
//---------------------------------------------------------------------------
CXformSet *
CLogicalLeftAntiSemiApply::PxfsCandidates(CMemoryPool *mp) const
{
CXformSet *xform_set = GPOS_NEW(mp) CXformSet(mp);
(void) xform_set->ExchangeSet(
CXform::ExfLeftAntiSemiApply2LeftAntiSemiJoin);
(void) xform_set->ExchangeSet(
CXform::ExfLeftAntiSemiApply2LeftAntiSemiJoinNoCorrelations);
return xform_set;
}
//---------------------------------------------------------------------------
// @function:
// CLogicalLeftAntiSemiApply::PopCopyWithRemappedColumns
//
// @doc:
// Return a copy of the operator with remapped columns
//
//---------------------------------------------------------------------------
COperator *
CLogicalLeftAntiSemiApply::PopCopyWithRemappedColumns(
CMemoryPool *mp, UlongToColRefMap *colref_mapping, BOOL must_exist)
{
CColRefArray *pdrgpcrInner =
CUtils::PdrgpcrRemap(mp, m_pdrgpcrInner, colref_mapping, must_exist);
return GPOS_NEW(mp)
CLogicalLeftAntiSemiApply(mp, pdrgpcrInner, m_eopidOriginSubq);
}
// EOF
相关信息
相关文章
greenplumn CExpressionFactorizer 源码
greenplumn CExpressionHandle 源码
greenplumn CExpressionPreprocessor 源码
greenplumn CExpressionUtils 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦