greenplumn CXformLeftAntiSemiJoin2NLJoin 代码
文件路径：/src/backend/gporca/libgpopt/src/xforms/CXformLeftAntiSemiJoin2NLJoin.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2011 EMC Corp.
/
/ @filename:
/ CXformLeftAntiSemiJoin2NLJoin.cpp
/
/ @doc:
/ Implementation of transform
/---------------------------------------------------------------------------
#include "gpopt/xforms/CXformLeftAntiSemiJoin2NLJoin.h"
#include "gpos/base.h"
#include "gpopt/operators/CLogicalLeftAntiSemiJoin.h"
#include "gpopt/operators/CPatternLeaf.h"
#include "gpopt/operators/CPhysicalLeftAntiSemiNLJoin.h"
#include "gpopt/xforms/CXformUtils.h"
using namespace gpopt;
/---------------------------------------------------------------------------
/ @function:
/ CXformLeftAntiSemiJoin2NLJoin::CXformLeftAntiSemiJoin2NLJoin
/
/ @doc:
/ ctor
/
/---------------------------------------------------------------------------
CXformLeftAntiSemiJoin2NLJoin::CXformLeftAntiSemiJoin2NLJoin(CMemoryPool *mp)
: / pattern
CXformImplementation(GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CLogicalLeftAntiSemiJoin(mp),
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CPatternLeaf(mp)), / left child
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CPatternLeaf(mp)), / right child
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CPatternLeaf(mp))) / predicate
)
{
}
/---------------------------------------------------------------------------
/ @function:
/ CXformLeftAntiSemiJoin2NLJoin::Exfp
/
/ @doc:
/ Compute xform promise for a given expression handle;
/
/---------------------------------------------------------------------------
CXform::EXformPromise
CXformLeftAntiSemiJoin2NLJoin::Exfp(CExpressionHandle &exprhdl) const
{
return CXformUtils::ExfpLogicalJoin2PhysicalJoin(exprhdl);
}
/---------------------------------------------------------------------------
/ @function:
/ CXformLeftAntiSemiJoin2NLJoin::Transform
/
/ @doc:
/ actual transformation
/
/---------------------------------------------------------------------------
void
CXformLeftAntiSemiJoin2NLJoin::Transform(CXformContext *pxfctxt,
CXformResult *pxfres,
CExpression *pexpr) const
{
GPOS_ASSERT(nullptr != pxfctxt);
GPOS_ASSERT(FPromising(pxfctxt->Pmp(), this, pexpr));
GPOS_ASSERT(FCheckPattern(pexpr));
CXformUtils::ImplementNLJoin<CPhysicalLeftAntiSemiNLJoin>(pxfctxt, pxfres,
pexpr);
}
/ EOF
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