greenplumn CLogicalDML 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalDML.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CLogicalDML.h
/
/ @doc:
/ Logical DML operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalDML_H
#define GPOPT_CLogicalDML_H
#include "gpos/base.h"
#include "gpopt/operators/CLogical.h"
namespace gpopt
{
/ fwd declarations
class CTableDescriptor;
/---------------------------------------------------------------------------
/ @class:
/ CLogicalDML
/
/ @doc:
/ Logical DML operator
/
/---------------------------------------------------------------------------
class CLogicalDML : public CLogical
{
public:
/ enum of DML operators
enum EDMLOperator
{
EdmlInsert,
EdmlDelete,
EdmlUpdate,
EdmlSentinel
};
private:
/ dml operator
EDMLOperator m_edmlop;
/ table descriptor
CTableDescriptor *m_ptabdesc;
/ source columns
CColRefArray *m_pdrgpcrSource;
/ set of modified columns from the target table
CBitSet *m_pbsModified;
/ action column
CColRef *m_pcrAction;
/ table oid column
CColRef *m_pcrTableOid;
/ ctid column
CColRef *m_pcrCtid;
/ segmentId column
CColRef *m_pcrSegmentId;
/ Split Update
BOOL m_fSplit;
public:
CLogicalDML(const CLogicalDML &) = delete;
/ ctor
explicit CLogicalDML(CMemoryPool *mp);
/ ctor
CLogicalDML(CMemoryPool *mp, EDMLOperator edmlop,
CTableDescriptor *ptabdesc, CColRefArray *colref_array,
CBitSet *pbsModified, CColRef *pcrAction, CColRef *pcrTableOid,
CColRef *pcrCtid, CColRef *pcrSegmentId, BOOL fSplit);
/ dtor
~CLogicalDML() override;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopLogicalDML;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CLogicalDML";
}
/ dml operator
EDMLOperator
Edmlop() const
{
return m_edmlop;
}
/ source columns
CColRefArray *
PdrgpcrSource() const
{
return m_pdrgpcrSource;
}
/ modified columns set
CBitSet *
PbsModified() const
{
return m_pbsModified;
}
/ action column
CColRef *
PcrAction() const
{
return m_pcrAction;
}
/ table oid column
CColRef *
PcrTableOid() const
{
return m_pcrTableOid;
}
/ ctid column
CColRef *
PcrCtid() const
{
return m_pcrCtid;
}
/ segmentId column
CColRef *
PcrSegmentId() const
{
return m_pcrSegmentId;
}
/ return table's descriptor
CTableDescriptor *
Ptabdesc() const
{
return m_ptabdesc;
}
/ Is update using split
BOOL
FSplit() const
{
return m_fSplit;
}
/ 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 false;
}
/ return a copy of the operator with remapped columns
COperator *PopCopyWithRemappedColumns(CMemoryPool *mp,
UlongToColRefMap *colref_mapping,
BOOL must_exist) override;
/-------------------------------------------------------------------------------------
/ Derived Relational Properties
/-------------------------------------------------------------------------------------
/ derive output columns
CColRefSet *DeriveOutputColumns(CMemoryPool *mp,
CExpressionHandle &exprhdl) override;
/ derive constraint property
CPropConstraint *DerivePropertyConstraint(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/ derive max card
CMaxCard DeriveMaxCard(CMemoryPool *mp,
CExpressionHandle &exprhdl) const override;
/ derive partition consumer info
CPartInfo *
DerivePartitionInfo(CMemoryPool *, / mp,
CExpressionHandle &exprhdl) const override
{
return PpartinfoPassThruOuter(exprhdl);
}
/ compute required stats columns of the n-th child
CColRefSet *
PcrsStat(CMemoryPool *, / mp
CExpressionHandle &, / exprhdl
CColRefSet *pcrsInput,
ULONG / child_index
) const override
{
return PcrsStatsPassThru(pcrsInput);
}
/-------------------------------------------------------------------------------------
/ Transformations
/-------------------------------------------------------------------------------------
/ candidate set of xforms
CXformSet *PxfsCandidates(CMemoryPool *mp) const override;
/ derive key collections
CKeyCollection *DeriveKeyCollection(
CMemoryPool *mp, CExpressionHandle &exprhdl) 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;
}
/-------------------------------------------------------------------------------------
/-------------------------------------------------------------------------------------
/-------------------------------------------------------------------------------------
/ conversion function
static CLogicalDML *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalDML == pop->Eopid());
return dynamic_cast<CLogicalDML *>(pop);
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
/ Helper function to print DML operator type.
static void PrintOperatorType(IOstream &os, EDMLOperator, BOOL fSplit);
}; / class CLogicalDML
} / namespace gpopt
#endif / !GPOPT_CLogicalDML_H
/ EOF
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