//---------------------------------------------------------------------------
// @function:
// CPartIndexMap::FSatisfies
//
// @doc:
// Check if part index map satisfies required partition propagation spec
//
//---------------------------------------------------------------------------
BOOL
CPartIndexMap::FSatisfies
(
const CPartitionPropagationSpec *ppps
)
const
{
GPOS_ASSERT(NULL != ppps);
CPartIndexMap *ppimReqd = ppps->Ppim();
if (NULL == ppimReqd || !ppimReqd->FContainsUnresolved())
{
// no reqiurements specified
return true;
}
// check if all required entries are satisfied
PartIndexMapIter pimiReqd(ppimReqd->m_pim);
while (pimiReqd.FAdvance())
{
const CPartTableInfo *pptiReqd = pimiReqd.Pt();
CPartTableInfo *ppti = PptiLookup(pptiReqd->UlScanId());
if (NULL != ppti && !FSatisfiesEntry(pptiReqd, ppti))
{
return false;
}
}
return true;
}
//---------------------------------------------------------------------------
// @function:
// CPhysical::EpetPartitionPropagation
//
// @doc:
// Compute the enforcing type for the operator
//
//---------------------------------------------------------------------------
CEnfdProp::EPropEnforcingType
CPhysical::EpetPartitionPropagation
(
CExpressionHandle &exprhdl,
const CEnfdPartitionPropagation *pepp
)
const
{
CPartIndexMap *ppimReqd = pepp->PppsRequired()->Ppim();
if (!ppimReqd->FContainsUnresolved())
{
// no unresolved partition consumers left
return CEnfdProp::EpetUnnecessary;
}
CPartIndexMap *ppimDrvd = CDrvdPropPlan::Pdpplan(exprhdl.Pdp())->Ppim();
GPOS_ASSERT(NULL != ppimDrvd);
BOOL fInScope = pepp->FInScope(m_mp, ppimDrvd);
BOOL fResolved = pepp->FResolved(m_mp, ppimDrvd);
if (fResolved)
{
// all required partition consumers are resolved
return CEnfdProp::EpetUnnecessary;
}
if (!fInScope)
{
// some partition consumers are not in scope of the operator: need to enforce these on top
return CEnfdProp::EpetRequired;
}
// all partition resolvers are in scope of the operator: do not enforce them on top
return CEnfdProp::EpetProhibited;
}
//---------------------------------------------------------------------------
// @function:
// CPhysicalUnionAll::EpetPartitionPropagation
//
// @doc:
// Compute the enforcing type for the operator
//
//---------------------------------------------------------------------------
CEnfdProp::EPropEnforcingType
CPhysicalUnionAll::EpetPartitionPropagation
(
CExpressionHandle &exprhdl,
const CEnfdPartitionPropagation *pepp
)
const
{
CPartIndexMap *ppimReqd = pepp->PppsRequired()->Ppim();
if (!ppimReqd->FContainsUnresolved())
{
// no unresolved partition consumers left
return CEnfdProp::EpetUnnecessary;
}
CPartIndexMap *ppimDrvd = CDrvdPropPlan::Pdpplan(exprhdl.Pdp())->Ppim();
GPOS_ASSERT(NULL != ppimDrvd);
BOOL fInScope = pepp->FInScope(m_pmp, ppimDrvd);
BOOL fResolved = pepp->FResolved(m_pmp, ppimDrvd);
if (fResolved)
{
// all required partition consumers are resolved
return CEnfdProp::EpetUnnecessary;
}
if (!fInScope)
{
// some partition consumers are not covered downstream
return CEnfdProp::EpetRequired;
}
DrgPul *pdrgpul = ppimReqd->PdrgpulScanIds(m_pmp);
const ULONG ulScanIds = pdrgpul->UlLength();
const ULONG ulArity = exprhdl.UlNonScalarChildren();
for (ULONG ul = 0; ul < ulScanIds; ul++)
{
ULONG ulScanId = *((*pdrgpul)[ul]);
ULONG ulChildrenWithConsumers = 0;
for (ULONG ulChildIdx = 0; ulChildIdx < ulArity; ulChildIdx++)
{
if (exprhdl.Pdprel(ulChildIdx)->Ppartinfo()->FContainsScanId(ulScanId))
{
ulChildrenWithConsumers++;
}
}
if (1 < ulChildrenWithConsumers)
{
// partition consumer exists in more than one child, so enforce it here
pdrgpul->Release();
return CEnfdProp::EpetRequired;
}
}
pdrgpul->Release();
// required part propagation can be enforced here or passed to the children
return CEnfdProp::EpetOptional;
}