greenplumn CXformImplementDynamicBitmapTableGet 代码
文件路径：/src/backend/gporca/libgpopt/src/xforms/CXformImplementDynamicBitmapTableGet.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CXformImplementDynamicBitmapTableGet.cpp
/
/ @doc:
/ Implement DynamicBitmapTableGet
/
/ @owner:
/
/
/ @test:
/
/---------------------------------------------------------------------------
#include "gpopt/xforms/CXformImplementDynamicBitmapTableGet.h"
#include "gpopt/metadata/CPartConstraint.h"
#include "gpopt/metadata/CTableDescriptor.h"
#include "gpopt/operators/CLogicalDynamicBitmapTableGet.h"
#include "gpopt/operators/CPatternLeaf.h"
#include "gpopt/operators/CPhysicalDynamicBitmapTableScan.h"
using namespace gpopt;
using namespace gpos;
/---------------------------------------------------------------------------
/ @function:
/ CXformImplementDynamicBitmapTableGet::CXformImplementDynamicBitmapTableGet
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CXformImplementDynamicBitmapTableGet::CXformImplementDynamicBitmapTableGet(
CMemoryPool *mp)
: / pattern
CXformImplementation(GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CLogicalDynamicBitmapTableGet(mp),
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CPatternLeaf(mp)), / predicate tree
GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CPatternLeaf(mp)) / bitmap index expression
))
{
}
/ compute xform promise for a given expression handle
CXform::EXformPromise
CXformImplementDynamicBitmapTableGet::Exfp(CExpressionHandle &exprhdl) const
{
if (exprhdl.DeriveHasSubquery(0) || exprhdl.DeriveHasSubquery(1))
{
return CXform::ExfpNone;
}
return CXform::ExfpHigh;
}
/---------------------------------------------------------------------------
/ @function:
/ CXformImplementDynamicBitmapTableGet::Transform
/
/ @doc:
/ Actual transformation
/
/---------------------------------------------------------------------------
void
CXformImplementDynamicBitmapTableGet::Transform(
CXformContext *pxfctxt GPOS_ASSERTS_ONLY, CXformResult *pxfres GPOS_UNUSED,
CExpression *pexpr GPOS_ASSERTS_ONLY) const
{
GPOS_ASSERT(nullptr != pxfctxt);
GPOS_ASSERT(FPromising(pxfctxt->Pmp(), this, pexpr));
GPOS_ASSERT(FCheckPattern(pexpr));
CMemoryPool *mp = pxfctxt->Pmp();
CLogicalDynamicBitmapTableGet *popLogical =
CLogicalDynamicBitmapTableGet::PopConvert(pexpr->Pop());
CTableDescriptor *ptabdesc = popLogical->Ptabdesc();
ptabdesc->AddRef();
CName *pname = GPOS_NEW(mp) CName(mp, popLogical->Name());
CColRefArray *pdrgpcrOutput = popLogical->PdrgpcrOutput();
GPOS_ASSERT(nullptr != pdrgpcrOutput);
pdrgpcrOutput->AddRef();
CColRef2dArray *pdrgpdrgpcrPart = popLogical->PdrgpdrgpcrPart();
pdrgpdrgpcrPart->AddRef();
popLogical->GetPartitionMdids()->AddRef();
popLogical->GetRootColMappingPerPart()->AddRef();
CPhysicalDynamicBitmapTableScan *popPhysical =
GPOS_NEW(mp) CPhysicalDynamicBitmapTableScan(
mp, ptabdesc, pexpr->Pop()->UlOpId(), pname, popLogical->ScanId(),
pdrgpcrOutput, pdrgpdrgpcrPart, popLogical->GetPartitionMdids(),
popLogical->GetRootColMappingPerPart());
CExpression *pexprCondition = (*pexpr)[0];
CExpression *pexprIndexPath = (*pexpr)[1];
pexprCondition->AddRef();
pexprIndexPath->AddRef();
CExpression *pexprPhysical = GPOS_NEW(mp)
CExpression(mp, popPhysical, pexprCondition, pexprIndexPath);
pxfres->Add(pexprPhysical);
}
/ EOF
相关信息
相关文章
greenplumn CJoinOrderGreedy 源码
greenplumn CJoinOrderMinCard 源码
greenplumn CSubqueryHandler 源码