greenplumn CPhysicalBitmapTableScan 源码
greenplumn CPhysicalBitmapTableScan 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CPhysicalBitmapTableScan.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CPhysicalBitmapTableScan.h
//
// @doc:
// Bitmap table scan physical operator
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPOPT_CPhysicalBitmapTableScan_H
#define GPOPT_CPhysicalBitmapTableScan_H
#include "gpos/base.h"
#include "gpopt/operators/CPhysicalScan.h"
namespace gpopt
{
// fwd declarations
class CDistributionSpec;
class CTableDescriptor;
//---------------------------------------------------------------------------
// @class:
// CPhysicalBitmapTableScan
//
// @doc:
// Bitmap table scan physical operator
//
//---------------------------------------------------------------------------
class CPhysicalBitmapTableScan : public CPhysicalScan
{
private:
// origin operator id -- gpos::ulong_max if operator was not generated via a transformation
ULONG m_ulOriginOpId;
public:
CPhysicalBitmapTableScan(const CPhysicalBitmapTableScan &) = delete;
// ctor
CPhysicalBitmapTableScan(CMemoryPool *mp, CTableDescriptor *ptabdesc,
ULONG ulOriginOpId, const CName *pnameTableAlias,
CColRefArray *pdrgpcrOutput);
// dtor
~CPhysicalBitmapTableScan() override = default;
// ident accessors
EOperatorId
Eopid() const override
{
return EopPhysicalBitmapTableScan;
}
// operator name
const CHAR *
SzId() const override
{
return "CPhysicalBitmapTableScan";
}
// sensitivity to order of inputs
BOOL
FInputOrderSensitive() const override
{
return true;
}
// 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;
// statistics derivation during costing
IStatistics *
PstatsDerive(CMemoryPool *, // mp
CExpressionHandle &, // exprhdl
CReqdPropPlan *, // prpplan
IStatisticsArray * //stats_ctxt
) const override
{
GPOS_ASSERT(
!"stats derivation during costing for bitmap table scan is invalid");
return nullptr;
}
// debug print
IOstream &OsPrint(IOstream &) const override;
// conversion function
static CPhysicalBitmapTableScan *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopPhysicalBitmapTableScan == pop->Eopid());
return dynamic_cast<CPhysicalBitmapTableScan *>(pop);
}
};
} // namespace gpopt
#endif // !GPOPT_CPhysicalBitmapTableScan_H
// EOF
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