greenplumn CLogicalDynamicBitmapTableGet 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalDynamicBitmapTableGet.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CLogicalDynamicBitmapTableGet.h
/
/ @doc:
/ Logical operator for dynamic table access via bitmap indexes.
/
/ @owner:
/
/
/ @test:
/
/---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalDynamicBitmapTableGet_H
#define GPOPT_CLogicalDynamicBitmapTableGet_H
#include "gpos/base.h"
#include "gpopt/operators/CLogicalDynamicGetBase.h"
namespace gpopt
{
/ fwd declarations
class CColRefSet;
class CTableDescriptor;
/---------------------------------------------------------------------------
/ @class:
/ CLogicalDynamicBitmapTableGet
/
/ @doc:
/ Logical operator for dynamic table access via bitmap indexes.
/
/---------------------------------------------------------------------------
class CLogicalDynamicBitmapTableGet : public CLogicalDynamicGetBase
{
private:
/ origin operator id -- gpos::ulong_max if operator was not generated via a transformation
ULONG m_ulOriginOpId;
public:
CLogicalDynamicBitmapTableGet(const CLogicalDynamicBitmapTableGet &) =
delete;
/ ctors
CLogicalDynamicBitmapTableGet(CMemoryPool *mp, CTableDescriptor *ptabdesc,
ULONG ulOriginOpId,
const CName *pnameTableAlias,
ULONG ulPartIndex,
CColRefArray *pdrgpcrOutput,
CColRef2dArray *pdrgpdrgpcrPart,
IMdIdArray *partition_mdids);
explicit CLogicalDynamicBitmapTableGet(CMemoryPool *mp);
/ dtor
~CLogicalDynamicBitmapTableGet() override;
/ identifier
EOperatorId
Eopid() const override
{
return EopLogicalDynamicBitmapTableGet;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CLogicalDynamicBitmapTableGet";
}
/ operator specific hash function
ULONG HashValue() const override;
/ match function
BOOL Matches(COperator *pop) const override;
/ sensitivity to order of inputs
BOOL
FInputOrderSensitive() const override
{
return true;
}
/ return a copy of the operator with remapped columns
COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
/ derive outer references
CColRefSet *DeriveOuterReferences(CMemoryPool *mp,
CExpressionHandle &exprhdl) override;
/ derive constraint property
CPropConstraint *DerivePropertyConstraint(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/ compute required stat columns of the n-th child
CColRefSet *
PcrsStat(CMemoryPool *mp,
CExpressionHandle &, / exprhdl
CColRefSet *, /pcrsInput
ULONG / child_index
) const override
{
return GPOS_NEW(mp) CColRefSet(mp);
}
/ candidate set of xforms
CXformSet *PxfsCandidates(CMemoryPool *mp) const override;
/ derive statistics
IStatistics *PstatsDerive(CMemoryPool *mp, CExpressionHandle &exprhdl,
IStatisticsArray *stats_ctxt) const override;
/ stat promise
EStatPromise
Esp(CExpressionHandle &) const override
{
return CLogical::EspHigh;
}
/ origin operator id -- gpos::ulong_max if operator was not generated via a transformation
ULONG
UlOriginOpId() const
{
return m_ulOriginOpId;
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
/ conversion
static CLogicalDynamicBitmapTableGet *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalDynamicBitmapTableGet == pop->Eopid());
return dynamic_cast<CLogicalDynamicBitmapTableGet *>(pop);
}
}; / class CLogicalDynamicBitmapTableGet
} / namespace gpopt
#endif / !GPOPT_CLogicalDynamicBitmapTableGet_H
/ EOF
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