greenplumn CPhysicalDynamicIndexScan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPhysicalDynamicIndexScan.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2012 EMC Corp
/
/ @filename:
/ CPhysicalDynamicIndexScan.h
/
/ @doc:
/ Physical dynamic index scan operators on partitioned tables
/---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalDynamicIndexScan_H
#define GPOPT_CPhysicalDynamicIndexScan_H
#include "gpos/base.h"
#include "gpopt/metadata/CIndexDescriptor.h"
#include "gpopt/operators/CPhysicalDynamicScan.h"
namespace gpopt
{
/ fwd declarations
class CTableDescriptor;
class CIndexDescriptor;
class CName;
class CPartConstraint;
/---------------------------------------------------------------------------
/ @class:
/ CPhysicalDynamicIndexScan
/
/ @doc:
/ Physical dynamic index scan operators for partitioned tables
/
/---------------------------------------------------------------------------
class CPhysicalDynamicIndexScan : public CPhysicalDynamicScan
{
private:
/ index descriptor
CIndexDescriptor *m_pindexdesc;
/ order
COrderSpec *m_pos;
public:
CPhysicalDynamicIndexScan(const CPhysicalDynamicIndexScan &) = delete;
/ ctors
CPhysicalDynamicIndexScan(CMemoryPool *mp, CIndexDescriptor *pindexdesc,
CTableDescriptor *ptabdesc, ULONG ulOriginOpId,
const CName *pnameAlias,
CColRefArray *pdrgpcrOutput, ULONG scan_id,
CColRef2dArray *pdrgpdrgpcrPart, COrderSpec *pos,
IMdIdArray *partition_mdids,
ColRefToUlongMapArray *root_col_mapping_per_part);
/ dtor
~CPhysicalDynamicIndexScan() override;
/ ident accessors
EOperatorId
Eopid() const override
{
return EopPhysicalDynamicIndexScan;
}
/ operator name
const CHAR *
SzId() const override
{
return "CPhysicalDynamicIndexScan";
}
/ index descriptor
CIndexDescriptor *
Pindexdesc() const
{
return m_pindexdesc;
}
/ operator specific hash function
ULONG HashValue() const override;
/ match function
BOOL Matches(COperator *pop) const override;
/-------------------------------------------------------------------------------------
/ Derived Plan Properties
/-------------------------------------------------------------------------------------
/ derive sort order
COrderSpec *
PosDerive(CMemoryPool *, /mp
CExpressionHandle & /exprhdl
) const override
{
m_pos->AddRef();
return m_pos;
}
/-------------------------------------------------------------------------------------
/ Enforced Properties
/-------------------------------------------------------------------------------------
/ return order property enforcing type for this operator
CEnfdProp::EPropEnforcingType EpetOrder(
CExpressionHandle &exprhdl, const CEnfdOrder *peo) const override;
/ conversion function
static CPhysicalDynamicIndexScan *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopPhysicalDynamicIndexScan == pop->Eopid());
return dynamic_cast<CPhysicalDynamicIndexScan *>(pop);
}
/ debug print
IOstream &OsPrint(IOstream &) const override;
/ statistics derivation during costing
IStatistics *PstatsDerive(CMemoryPool *mp, CExpressionHandle &exprhdl,
CReqdPropPlan *prpplan,
IStatisticsArray *stats_ctxt) const override;
}; / class CPhysicalDynamicIndexScan
} / namespace gpopt
#endif / !GPOPT_CPhysicalDynamicIndexScan_H
/ EOF
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