greenplumn CPhysicalIndexOnlyScan 代码
文件路径：/src/backend/gporca/libgpopt/src/operators/CPhysicalIndexOnlyScan.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2020 VMware, Inc.
/
/ @filename:
/ CPhysicalIndexOnlyScan.cpp
/
/ @doc:
/ Implementation of index scan operator
/---------------------------------------------------------------------------
#include "gpopt/operators/CPhysicalIndexOnlyScan.h"
#include "gpos/base.h"
#include "gpopt/base/CUtils.h"
#include "gpopt/operators/CExpressionHandle.h"
using namespace gpopt;
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalIndexOnlyScan::CPhysicalIndexOnlyScan
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CPhysicalIndexOnlyScan::CPhysicalIndexOnlyScan(
CMemoryPool *mp, CIndexDescriptor *pindexdesc, CTableDescriptor *ptabdesc,
ULONG ulOriginOpId, const CName *pnameAlias, CColRefArray *pdrgpcrOutput,
COrderSpec *pos)
: CPhysicalScan(mp, pnameAlias, ptabdesc, pdrgpcrOutput),
m_pindexdesc(pindexdesc),
m_ulOriginOpId(ulOriginOpId),
m_pos(pos)
{
GPOS_ASSERT(nullptr != pindexdesc);
GPOS_ASSERT(nullptr != pos);
}
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalIndexOnlyScan::~CPhysicalIndexOnlyScan
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CPhysicalIndexOnlyScan::~CPhysicalIndexOnlyScan()
{
m_pindexdesc->Release();
m_pos->Release();
}
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalIndexOnlyScan::EpetOrder
/
/ @doc:
/ Return the enforcing type for order property based on this operator
/
/---------------------------------------------------------------------------
CEnfdProp::EPropEnforcingType
CPhysicalIndexOnlyScan::EpetOrder(CExpressionHandle &, / exprhdl
const CEnfdOrder *peo) const
{
GPOS_ASSERT(nullptr != peo);
GPOS_ASSERT(!peo->PosRequired()->IsEmpty());
if (peo->FCompatible(m_pos))
{
/ required order is already established by the index
return CEnfdProp::EpetUnnecessary;
}
return CEnfdProp::EpetRequired;
}
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalIndexOnlyScan::HashValue
/
/ @doc:
/ Combine pointers for table descriptor, index descriptor and Eop
/
/---------------------------------------------------------------------------
ULONG
CPhysicalIndexOnlyScan::HashValue() const
{
ULONG ulHash = gpos::CombineHashes(
COperator::HashValue(),
gpos::CombineHashes(m_pindexdesc->MDId()->HashValue(),
gpos::HashPtr<CTableDescriptor>(m_ptabdesc)));
ulHash =
gpos::CombineHashes(ulHash, CUtils::UlHashColArray(m_pdrgpcrOutput));
return ulHash;
}
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalIndexOnlyScan::Matches
/
/ @doc:
/ match operator
/
/---------------------------------------------------------------------------
BOOL
CPhysicalIndexOnlyScan::Matches(COperator *pop) const
{
return CUtils::FMatchIndex(this, pop);
}
/---------------------------------------------------------------------------
/ @function:
/ CPhysicalIndexOnlyScan::OsPrint
/
/ @doc:
/ debug print
/
/---------------------------------------------------------------------------
IOstream &
CPhysicalIndexOnlyScan::OsPrint(IOstream &os) const
{
if (m_fPattern)
{
return COperator::OsPrint(os);
}
os << SzId() << " ";
/ index name
os << " Index Name: (";
m_pindexdesc->Name().OsPrint(os);
/ table name
os << ")";
os << ", Table Name: (";
m_ptabdesc->Name().OsPrint(os);
os << ")";
os << ", Columns: [";
CUtils::OsPrintDrgPcr(os, m_pdrgpcrOutput);
os << "]";
return os;
}
/ EOF
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