greenplumn CScalarBitmapIndexProbe 源码
greenplumn CScalarBitmapIndexProbe 代码
文件路径:/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarBitmapIndexProbe.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 VMware, Inc. or its affiliates.
//
// @filename:
// CScalarBitmapIndexProbe.h
//
// @doc:
// Bitmap index probe scalar operator
//
// @owner:
//
//
// @test:
//
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarBitmapIndexProbe_H
#define GPOPT_CScalarBitmapIndexProbe_H
#include "gpos/base.h"
#include "gpopt/operators/CScalar.h"
namespace gpopt
{
// fwd declarations
class CColRefSet;
class CIndexDescriptor;
//---------------------------------------------------------------------------
// @class:
// CScalarBitmapIndexProbe
//
// @doc:
// Bitmap index probe scalar operator
//
//---------------------------------------------------------------------------
class CScalarBitmapIndexProbe : public CScalar
{
private:
// index descriptor
CIndexDescriptor *m_pindexdesc;
// bitmap type id
IMDId *m_pmdidBitmapType;
// private copy ctor
CScalarBitmapIndexProbe(const CScalarBitmapIndexProbe &);
public:
// ctor
CScalarBitmapIndexProbe(CMemoryPool *mp, CIndexDescriptor *pindexdesc,
IMDId *pmdidBitmapType);
// ctor
// only for transforms
explicit CScalarBitmapIndexProbe(CMemoryPool *mp);
// dtor
~CScalarBitmapIndexProbe() override;
// index descriptor
CIndexDescriptor *
Pindexdesc() const
{
return m_pindexdesc;
}
// bitmap type id
IMDId *
MdidType() const override
{
return m_pmdidBitmapType;
}
// identifier
EOperatorId
Eopid() const override
{
return EopScalarBitmapIndexProbe;
}
// return a string for operator name
const CHAR *
SzId() const override
{
return "CScalarBitmapIndexProbe";
}
// 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
{
return PopCopyDefault();
}
// debug print
IOstream &OsPrint(IOstream &) const override;
// conversion
static CScalarBitmapIndexProbe *
PopConvert(COperator *pop)
{
GPOS_ASSERT(nullptr != pop);
GPOS_ASSERT(EopScalarBitmapIndexProbe == pop->Eopid());
return dynamic_cast<CScalarBitmapIndexProbe *>(pop);
}
}; // class CScalarBitmapIndexProbe
} // namespace gpopt
#endif // !GPOPT_CScalarBitmapIndexProbe_H
// EOF
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