//---------------------------------------------------------------------------
// @function:
// CConstraint::Phmcolconstr
//
// @doc:
// Construct mapping between columns and arrays of constraints
//
//---------------------------------------------------------------------------
HMColConstr *
CConstraint::Phmcolconstr
(
IMemoryPool *pmp,
CColRefSet *pcrs,
DrgPcnstr *pdrgpcnstr
)
const
{
GPOS_ASSERT(NULL != m_pcrsUsed);
HMColConstr *phmcolconstr = GPOS_NEW(pmp) HMColConstr(pmp);
CColRefSetIter crsi(*pcrs);
while (crsi.FAdvance())
{
CColRef *pcr = crsi.Pcr();
DrgPcnstr *pdrgpcnstrCol = PdrgpcnstrOnColumn(pmp, pdrgpcnstr, pcr, false /*fExclusive*/);
#ifdef GPOS_DEBUG
BOOL fres =
#endif //GPOS_DEBUG
phmcolconstr->FInsert(pcr, pdrgpcnstrCol);
GPOS_ASSERT(fres);
}
return phmcolconstr;
}
// mapping between columns and single column constraints in array of constraints
static
HMColConstr *
PhmcolconstrSingleColConstr
(
IMemoryPool *pmp,
DrgPcnstr *drgPcnstr
)
{
CAutoRef<DrgPcnstr> arpdrgpcnstr(drgPcnstr);
HMColConstr *phmcolconstr = GPOS_NEW(pmp) HMColConstr(pmp);
const ULONG ulLen = arpdrgpcnstr->UlLength();
for (ULONG ul = 0; ul < ulLen; ul++)
{
CConstraint *pcnstrChild = (*arpdrgpcnstr)[ul];
CColRefSet *pcrs = pcnstrChild->PcrsUsed();
if (1 == pcrs->CElements())
{
CColRef *pcr = pcrs->PcrFirst();
DrgPcnstr *pcnstrMapped = phmcolconstr->PtLookup(pcr);
if (NULL == pcnstrMapped)
{
pcnstrMapped = GPOS_NEW(pmp) DrgPcnstr(pmp);
phmcolconstr->FInsert(pcr, pcnstrMapped);
}
pcnstrChild->AddRef();
pcnstrMapped->Append(pcnstrChild);
}
}
return phmcolconstr;
}