greenplumn CXformPushGbDedupBelowJoin 源码
greenplumn CXformPushGbDedupBelowJoin 代码
文件路径：/src/backend/gporca/libgpopt/src/xforms/CXformPushGbDedupBelowJoin.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 VMware, Inc. or its affiliates.
//
// @filename:
// CXformPushGbDedupBelowJoin.cpp
//
// @doc:
// Implementation of pushing dedup group by below join transform
//---------------------------------------------------------------------------
#include "gpopt/xforms/CXformPushGbDedupBelowJoin.h"
#include "gpos/base.h"
#include "gpopt/operators/CLogicalGbAggDeduplicate.h"
#include "gpopt/operators/CLogicalInnerJoin.h"
#include "gpopt/operators/CPatternLeaf.h"
#include "gpopt/xforms/CXformUtils.h"
using namespace gpopt;
//---------------------------------------------------------------------------
// @function:
// CXformPushGbDedupBelowJoin::CXformPushGbDedupBelowJoin
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CXformPushGbDedupBelowJoin::CXformPushGbDedupBelowJoin(CMemoryPool *mp)
: // pattern
CXformPushGbBelowJoin(GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CLogicalGbAggDeduplicate(mp),
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CLogicalInnerJoin(mp),
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CPatternLeaf(mp)), // join outer child
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CPatternLeaf(mp)), // join inner child
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CPatternTree(mp)) // join predicate
),
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CPatternTree(mp)) // scalar project list
))
{
}
// EOF
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