greenplumn CLogicalCTEProducer 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CLogicalCTEProducer.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp.
/
/ @filename:
/ CLogicalCTEProducer.h
/
/ @doc:
/ Logical CTE producer operator
/---------------------------------------------------------------------------
#ifndef GPOPT_CLogicalCTEProducer_H
#define GPOPT_CLogicalCTEProducer_H
#include "gpos/base.h"
#include "gpopt/operators/CExpressionHandle.h"
#include "gpopt/operators/CLogical.h"
namespace gpopt
{
/---------------------------------------------------------------------------
/ @class:
/ CLogicalCTEProducer
/
/ @doc:
/ CTE producer operator
/
/---------------------------------------------------------------------------
class CLogicalCTEProducer : public CLogical
{
private:
/ cte identifier
ULONG m_id;
/ cte columns
CColRefArray *m_pdrgpcr;
/ output columns, same as cte columns but in CColRefSet
CColRefSet *m_pcrsOutput;
public:
CLogicalCTEProducer(const CLogicalCTEProducer &) = delete;
/ ctor
explicit CLogicalCTEProducer(CMemoryPool *mp);
/ ctor
CLogicalCTEProducer(CMemoryPool *mp, ULONG id, CColRefArray *colref_array);
/ dtor
~CLogicalCTEProducer() override;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopLogicalCTEProducer;
}
const CHAR *
SzId() const override
{
return "CLogicalCTEProducer";
}
/ cte identifier
ULONG
UlCTEId() const
{
return m_id;
}
/ cte columns
CColRefArray *
Pdrgpcr() const
{
return m_pdrgpcr;
}
/ cte columns in CColRefSet
CColRefSet *
DeriveOutputColumns() const
{
return m_pcrsOutput;
}
/ 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;
/ dervive keys
CKeyCollection *DeriveKeyCollection(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/ derive max card
CMaxCard DeriveMaxCard(CMemoryPool *mp,
CExpressionHandle &exprhdl) const override;
/ derive not nullable output columns
CColRefSet *DeriveNotNullColumns(CMemoryPool *mp,
CExpressionHandle &exprhdl) const override;
/ derive constraint property
CPropConstraint *
DerivePropertyConstraint(CMemoryPool *mp,
CExpressionHandle &exprhdl) const override
{
return PpcDeriveConstraintRestrict(mp, exprhdl, m_pcrsOutput);
}
/ derive partition consumer info
CPartInfo *
DerivePartitionInfo(CMemoryPool *, / mp,
CExpressionHandle &exprhdl) const override
{
return PpartinfoPassThruOuter(exprhdl);
}
CTableDescriptor *DeriveTableDescriptor(
CMemoryPool *mp, CExpressionHandle &exprhdl) const override;
/ 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 statistics
IStatistics *
PstatsDerive(CMemoryPool *, /mp,
CExpressionHandle &exprhdl,
IStatisticsArray * /stats_ctxt
) const override
{
return PstatsPassThruOuter(exprhdl);
}
/ stat promise
EStatPromise
Esp(CExpressionHandle &) const override
{
return CLogical::EspHigh;
}
/-------------------------------------------------------------------------------------
/ Transformations
/-------------------------------------------------------------------------------------
/ candidate set of xforms
CXformSet *PxfsCandidates(CMemoryPool *mp) const override;
/-------------------------------------------------------------------------------------
/ conversion function
static CLogicalCTEProducer *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopLogicalCTEProducer == pop->Eopid());
return dynamic_cast<CLogicalCTEProducer *>(pop);
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
}; / class CLogicalCTEProducer
} / namespace gpopt
#endif / !GPOPT_CLogicalCTEProducer_H
/ EOF
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