//---------------------------------------------------------------------------
// @function:
// CXformImplementDML::Transform
//
// @doc:
// Actual transformation
//
//---------------------------------------------------------------------------
void
CXformImplementDML::Transform
(
CXformContext *pxfctxt,
CXformResult *pxfres,
CExpression *pexpr
)
const
{
GPOS_ASSERT(NULL != pxfctxt);
GPOS_ASSERT(FPromising(pxfctxt->Pmp(), this, pexpr));
GPOS_ASSERT(FCheckPattern(pexpr));
CLogicalDML *popDML = CLogicalDML::PopConvert(pexpr->Pop());
IMemoryPool *mp = pxfctxt->Pmp();
// extract components for alternative
CLogicalDML::EDMLOperator edmlop = popDML->Edmlop();
CTableDescriptor *ptabdesc = popDML->Ptabdesc();
ptabdesc->AddRef();
CColRefArray *pdrgpcrSource = popDML->PdrgpcrSource();
pdrgpcrSource->AddRef();
CBitSet *pbsModified = popDML->PbsModified();
pbsModified->AddRef();
CColRef *pcrAction = popDML->PcrAction();
CColRef *pcrTableOid = popDML->PcrTableOid();
CColRef *pcrCtid = popDML->PcrCtid();
CColRef *pcrSegmentId = popDML->PcrSegmentId();
CColRef *pcrTupleOid = popDML->PcrTupleOid();
// child of DML operator
CExpression *pexprChild = (*pexpr)[0];
pexprChild->AddRef();
// create physical DML
CExpression *pexprAlt =
GPOS_NEW(mp) CExpression
(
mp,
GPOS_NEW(mp) CPhysicalDML(mp, edmlop, ptabdesc, pdrgpcrSource, pbsModified, pcrAction, pcrTableOid, pcrCtid, pcrSegmentId, pcrTupleOid),
pexprChild
);
// add alternative to transformation result
pxfres->Add(pexprAlt);
}
//---------------------------------------------------------------------------
// @function:
// CLogicalDML::FMatch
//
// @doc:
// Match function
//
//---------------------------------------------------------------------------
BOOL
CLogicalDML::FMatch
(
COperator *pop
)
const
{
if (pop->Eopid() != Eopid())
{
return false;
}
CLogicalDML *popDML = CLogicalDML::PopConvert(pop);
return m_pcrAction == popDML->PcrAction() &&
m_pcrTableOid == popDML->PcrTableOid() &&
m_pcrCtid == popDML->PcrCtid() &&
m_pcrSegmentId == popDML->PcrSegmentId() &&
m_pcrTupleOid == popDML->PcrTupleOid() &&
m_ptabdesc->Pmdid()->FEquals(popDML->Ptabdesc()->Pmdid()) &&
m_pdrgpcrSource->FEqual(popDML->PdrgpcrSource());
}