greenplumn CXformSelect2BitmapBoolOp 源码
greenplumn CXformSelect2BitmapBoolOp 代码
文件路径：/src/backend/gporca/libgpopt/src/xforms/CXformSelect2BitmapBoolOp.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CXformSelect2BitmapBoolOp.cpp
//
// @doc:
// Transform select over table into a bitmap table get over bitmap bool op
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#include "gpopt/xforms/CXformSelect2BitmapBoolOp.h"
#include "gpopt/operators/CLogicalGet.h"
#include "gpopt/operators/CLogicalSelect.h"
#include "gpopt/xforms/CXformUtils.h"
using namespace gpmd;
using namespace gpopt;
//---------------------------------------------------------------------------
// @function:
// CXformSelect2BitmapBoolOp::CXformSelect2BitmapBoolOp
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CXformSelect2BitmapBoolOp::CXformSelect2BitmapBoolOp(CMemoryPool *mp)
: CXformExploration(GPOS_NEW(mp) CExpression(
mp, GPOS_NEW(mp) CLogicalSelect(mp),
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CLogicalGet(mp)), // logical child
GPOS_NEW(mp)
CExpression(mp, GPOS_NEW(mp) CPatternTree(mp)) // predicate tree
))
{
}
//---------------------------------------------------------------------------
// @function:
// CXformSelect2BitmapBoolOp::Exfp
//
// @doc:
// Compute xform promise for a given expression handle
//
//---------------------------------------------------------------------------
CXform::EXformPromise
CXformSelect2BitmapBoolOp::Exfp(CExpressionHandle & // exprhdl
) const
{
return CXform::ExfpHigh;
}
//---------------------------------------------------------------------------
// @function:
// CXformSelect2BitmapBoolOp::Transform
//
// @doc:
// Actual transformation
//
//---------------------------------------------------------------------------
void
CXformSelect2BitmapBoolOp::Transform(CXformContext *pxfctxt,
CXformResult *pxfres,
CExpression *pexpr) const
{
GPOS_ASSERT(nullptr != pxfctxt);
GPOS_ASSERT(FPromising(pxfctxt->Pmp(), this, pexpr));
GPOS_ASSERT(FCheckPattern(pexpr));
CExpression *pexprResult =
CXformUtils::PexprSelect2BitmapBoolOp(pxfctxt->Pmp(), pexpr);
if (nullptr != pexprResult)
{
pxfres->Add(pexprResult);
}
}
// EOF
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