greenplumn CLogicalBitmapTableGet 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalBitmapTableGet.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2014 VMware, Inc. or its affiliates.
/
/ @filename:
/ CLogicalBitmapTableGet.h
/
/ @doc:
/ Logical operator for table access via bitmap indexes.
/
/ @owner:
/
/
/ @test:
/
/---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalBitmapTableGet_H
#define GPOPT_CLogicalBitmapTableGet_H
#include "gpos/base.h"
#include "gpopt/operators/CLogical.h"
namespace gpopt
{
/ fwd declarations
class CColRefSet;
class CTableDescriptor;
/---------------------------------------------------------------------------
/ @class:
/ CLogicalBitmapTableGet
/
/ @doc:
/ Logical operator for table access via bitmap indexes.
/
/---------------------------------------------------------------------------
class CLogicalBitmapTableGet : public CLogical
{
private:
/ table descriptor
CTableDescriptor *m_ptabdesc;
/ origin operator id -- gpos::ulong_max if operator was not generated via a transformation
ULONG m_ulOriginOpId;
/ alias for table
const CName *m_pnameTableAlias;
/ output columns
CColRefArray *m_pdrgpcrOutput;
public:
CLogicalBitmapTableGet(const CLogicalBitmapTableGet &) = delete;
/ ctor
CLogicalBitmapTableGet(CMemoryPool *mp, CTableDescriptor *ptabdesc,
ULONG ulOriginOpId, const CName *pnameTableAlias,
CColRefArray *pdrgpcrOutput);
/ ctor
/ only for transformations
explicit CLogicalBitmapTableGet(CMemoryPool *mp);
/ dtor
~CLogicalBitmapTableGet() override;
/ table descriptor
CTableDescriptor *
Ptabdesc() const
{
return m_ptabdesc;
}
/ table alias
const CName *
PnameTableAlias()
{
return m_pnameTableAlias;
}
/ array of output column references
CColRefArray *
PdrgpcrOutput() const
{
return m_pdrgpcrOutput;
}
/ identifier
EOperatorId
Eopid() const override
{
return EopLogicalBitmapTableGet;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CLogicalBitmapTableGet";
}
/ origin operator id -- gpos::ulong_max if operator was not generated via a transformation
ULONG
UlOriginOpId() const
{
return m_ulOriginOpId;
}
/ 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 output columns
CColRefSet *DeriveOutputColumns(CMemoryPool *mp,
CExpressionHandle &exprhdl) override;
/ derive outer references
CColRefSet *DeriveOuterReferences(CMemoryPool *mp,
CExpressionHandle &exprhdl) override;
/ derive partition consumer info
CPartInfo *
DerivePartitionInfo(CMemoryPool *mp,
CExpressionHandle & /exprhdl
) const override
{
return GPOS_NEW(mp) CPartInfo(mp);
}
/ derive constraint property
CPropConstraint *DerivePropertyConstraint(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/ derive join depth
ULONG
DeriveJoinDepth(CMemoryPool *, / mp
CExpressionHandle & / exprhdl
) const override
{
return 1;
}
/ derive table descriptor
CTableDescriptor *
DeriveTableDescriptor(CMemoryPool *, / mp
CExpressionHandle & / exprhdl
) const override
{
return m_ptabdesc;
}
/ 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;
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
/ conversion
static CLogicalBitmapTableGet *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalBitmapTableGet == pop->Eopid());
return dynamic_cast<CLogicalBitmapTableGet *>(pop);
}
}; / class CLogicalBitmapTableGet
} / namespace gpopt
#endif / !GPOPT_CLogicalBitmapTableGet_H
/ EOF
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