greenplumn CLogicalRowTrigger 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalRowTrigger.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CLogicalRowTrigger.h
/
/ @doc:
/ Logical row-level trigger operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalRowTrigger_H
#define GPOPT_CLogicalRowTrigger_H
#include "gpos/base.h"
#include "gpopt/operators/CLogical.h"
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CLogicalRowTrigger
/
/ @doc:
/ Logical row-level trigger operator
/
/---------------------------------------------------------------------------
class CLogicalRowTrigger : public CLogical
{
private:
/ relation id on which triggers are to be executed
IMDId *m_rel_mdid;
/ trigger type
INT m_type;
/ old columns
CColRefArray *m_pdrgpcrOld;
/ new columns
CColRefArray *m_pdrgpcrNew;
/ stability
IMDFunction::EFuncStbl m_efs{IMDFunction::EfsImmutable};
/ initialize function properties
void InitFunctionProperties();
/ return the type of a given trigger as an integer
static INT ITriggerType(const IMDTrigger *pmdtrigger);
public:
CLogicalRowTrigger(const CLogicalRowTrigger &) = delete;
/ ctor
explicit CLogicalRowTrigger(CMemoryPool *mp);
/ ctor
CLogicalRowTrigger(CMemoryPool *mp, IMDId *rel_mdid, INT type,
CColRefArray *pdrgpcrOld, CColRefArray *pdrgpcrNew);
/ dtor
~CLogicalRowTrigger() override;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopLogicalRowTrigger;
}
/ return a string for operator name
const CHAR *
SzId() const override
{
return "CLogicalRowTrigger";
}
/ relation id
IMDId *
GetRelMdId() const
{
return m_rel_mdid;
}
/ trigger type
INT
GetType() const
{
return m_type;
}
/ old columns
CColRefArray *
PdrgpcrOld() const
{
return m_pdrgpcrOld;
}
/ new columns
CColRefArray *
PdrgpcrNew() const
{
return m_pdrgpcrNew;
}
/ 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
{
return CLogical::PpcDeriveConstraintPassThru(exprhdl, 0 /*ulChild*/);
}
/ 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);
}
/ derive function properties
CFunctionProp *DeriveFunctionProperties(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/-------------------------------------------------------------------------------------
/ 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 CLogicalRowTrigger *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalRowTrigger == pop->Eopid());
return dynamic_cast<CLogicalRowTrigger *>(pop);
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
}; / class CLogicalRowTrigger
} / namespace gpopt
#endif / !GPOPT_CLogicalRowTrigger_H
/ EOF
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