//---------------------------------------------------------------------------
// @function:
// CPhysicalMotion::PppsRequired
//
// @doc:
// Compute required partition propagation of the n-th child
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysicalMotion::PppsRequired
(
IMemoryPool *pmp,
CExpressionHandle &exprhdl,
CPartitionPropagationSpec *pppsRequired,
ULONG
#ifdef GPOS_DEBUG
ulChildIndex
#endif // GPOS_DEBUG
,
DrgPdp *, //pdrgpdpCtxt,
ULONG //ulOptReq
)
{
GPOS_ASSERT(0 == ulChildIndex);
GPOS_ASSERT(NULL != pppsRequired);
CPartIndexMap *ppimReqd = pppsRequired->Ppim();
CPartFilterMap *ppfmReqd = pppsRequired->Ppfm();
DrgPul *pdrgpul = ppimReqd->PdrgpulScanIds(pmp);
CPartIndexMap *ppimResult = GPOS_NEW(pmp) CPartIndexMap(pmp);
CPartFilterMap *ppfmResult = GPOS_NEW(pmp) CPartFilterMap(pmp);
/// get derived part consumers
CPartInfo *ppartinfo = exprhdl.Pdprel(0)->Ppartinfo();
const ULONG ulPartIndexSize = pdrgpul->UlLength();
for (ULONG ul = 0; ul < ulPartIndexSize; ul++)
{
ULONG ulPartIndexId = *((*pdrgpul)[ul]);
if (!ppartinfo->FContainsScanId(ulPartIndexId))
{
// part index id does not exist in child nodes: do not push it below
// the motion
continue;
}
ppimResult->AddRequiredPartPropagation(ppimReqd, ulPartIndexId, CPartIndexMap::EppraPreservePropagators);
(void) ppfmResult->FCopyPartFilter(m_pmp, ulPartIndexId, ppfmReqd);
}
pdrgpul->Release();
return GPOS_NEW(pmp) CPartitionPropagationSpec(ppimResult, ppfmResult);
}
//---------------------------------------------------------------------------
// @function:
// CPhysical::PppsRequiredPushThruUnresolvedUnary
//
// @doc:
// Helper function for pushing unresolved partition propagation in unary
// operators
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysical::PppsRequiredPushThruUnresolvedUnary
(
IMemoryPool *mp,
CExpressionHandle &exprhdl,
CPartitionPropagationSpec *pppsRequired,
EPropogatePartConstraint eppcPropogate
)
{
GPOS_ASSERT(NULL != pppsRequired);
CPartInfo *ppartinfo = exprhdl.GetRelationalProperties(0)->Ppartinfo();
CPartIndexMap *ppimReqd = pppsRequired->Ppim();
CPartFilterMap *ppfmReqd = pppsRequired->Ppfm();
ULongPtrArray *pdrgpul = ppimReqd->PdrgpulScanIds(mp);
CPartIndexMap *ppimResult = GPOS_NEW(mp) CPartIndexMap(mp);
CPartFilterMap *ppfmResult = GPOS_NEW(mp) CPartFilterMap(mp);
const ULONG ulPartIndexIds = pdrgpul->Size();
// iterate over required part index ids and decide which ones to push through
for (ULONG ul = 0; ul < ulPartIndexIds; ul++)
{
ULONG part_idx_id = *((*pdrgpul)[ul]);
GPOS_ASSERT(ppimReqd->Contains(part_idx_id));
// if part index id is defined in child, push it to the child
if (ppartinfo->FContainsScanId(part_idx_id))
{
// push requirements to child node
ppimResult->AddRequiredPartPropagation(ppimReqd, part_idx_id, CPartIndexMap::EppraPreservePropagators);
if (CPhysical::EppcAllowed == eppcPropogate)
{
// for some logical operators such as limit while we push the part index map, we cannot push the constraints
// since they are NOT semantically equivalent. So only push the constraints when the operator asks this
// utility function to do so
(void) ppfmResult->FCopyPartFilter(mp, part_idx_id, ppfmReqd);
}
}
}
pdrgpul->Release();
return GPOS_NEW(mp) CPartitionPropagationSpec(ppimResult, ppfmResult);
}
//---------------------------------------------------------------------------
// @function:
// CPhysicalPartitionSelector::PppsRequired
//
// @doc:
// Compute required partition propagation of the n-th child
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysicalPartitionSelector::PppsRequired
(
IMemoryPool *mp,
CExpressionHandle & exprhdl,
CPartitionPropagationSpec *pppsRequired,
ULONG
#ifdef GPOS_DEBUG
child_index
#endif // GPOS_DEBUG
,
CDrvdProp2dArray *, //pdrgpdpCtxt,
ULONG //ulOptReq
)
{
GPOS_ASSERT(0 == child_index);
GPOS_ASSERT(NULL != pppsRequired);
CPartIndexMap *ppimInput = pppsRequired->Ppim();
CPartFilterMap *ppfmInput = pppsRequired->Ppfm();
ULongPtrArray *pdrgpulInputScanIds = ppimInput->PdrgpulScanIds(mp);
CPartIndexMap *ppim = GPOS_NEW(mp) CPartIndexMap(mp);
CPartFilterMap *ppfm = GPOS_NEW(mp) CPartFilterMap(mp);
CPartInfo *ppartinfo = exprhdl.GetRelationalProperties(0)->Ppartinfo();
const ULONG ulScanIds = pdrgpulInputScanIds->Size();
for (ULONG ul = 0; ul < ulScanIds; ul++)
{
ULONG scan_id = *((*pdrgpulInputScanIds)[ul]);
ULONG ulExpectedPropagators = ppimInput->UlExpectedPropagators(scan_id);
if (scan_id == m_scan_id)
{
// partition propagation resolved - do not need to require from children
continue;
}
if (!ppartinfo->FContainsScanId(scan_id) && ppartinfo->FContainsScanId(m_scan_id))
{
// dynamic scan for the required id not defined below, but the current one is: do not push request down
continue;
}
IMDId *mdid = ppimInput->GetRelMdId(scan_id);
CPartKeysArray *pdrgppartkeys = ppimInput->Pdrgppartkeys(scan_id);
UlongToPartConstraintMap *ppartcnstrmap = ppimInput->Ppartcnstrmap(scan_id);
CPartConstraint *ppartcnstr = ppimInput->PpartcnstrRel(scan_id);
CPartIndexMap::EPartIndexManipulator epim = ppimInput->Epim(scan_id);
mdid->AddRef();
pdrgppartkeys->AddRef();
ppartcnstrmap->AddRef();
ppartcnstr->AddRef();
ppim->Insert(scan_id, ppartcnstrmap, epim, ulExpectedPropagators, mdid, pdrgppartkeys, ppartcnstr);
(void) ppfm->FCopyPartFilter(m_mp, scan_id, ppfmInput);
}
// cleanup
pdrgpulInputScanIds->Release();
return GPOS_NEW(mp) CPartitionPropagationSpec(ppim, ppfm);
}
//---------------------------------------------------------------------------
// @function:
// CPhysical::PppsRequiredPushThruNAry
//
// @doc:
// Helper for pushing required partition propagation to the children of
// an n-ary operator
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysical::PppsRequiredPushThruNAry
(
IMemoryPool *mp,
CExpressionHandle &exprhdl,
CPartitionPropagationSpec *pppsReqd,
ULONG child_index
)
{
GPOS_ASSERT(NULL != pppsReqd);
CPartIndexMap *ppimReqd = pppsReqd->Ppim();
CPartFilterMap *ppfmReqd = pppsReqd->Ppfm();
ULongPtrArray *pdrgpul = ppimReqd->PdrgpulScanIds(mp);
CPartIndexMap *ppimResult = GPOS_NEW(mp) CPartIndexMap(mp);
CPartFilterMap *ppfmResult = GPOS_NEW(mp) CPartFilterMap(mp);
const ULONG ulPartIndexIds = pdrgpul->Size();
const ULONG arity = exprhdl.UlNonScalarChildren();
// iterate over required part index ids and decide which ones to push to the outer
// and which to the inner side of the n-ary op
for (ULONG ul = 0; ul < ulPartIndexIds; ul++)
{
ULONG part_idx_id = *((*pdrgpul)[ul]);
GPOS_ASSERT(ppimReqd->Contains(part_idx_id));
CBitSet *pbsPartConsumer = GPOS_NEW(mp) CBitSet(mp);
for (ULONG ulChildIdx = 0; ulChildIdx < arity; ulChildIdx++)
{
if (exprhdl.GetRelationalProperties(ulChildIdx)->Ppartinfo()->FContainsScanId(part_idx_id))
{
(void) pbsPartConsumer->ExchangeSet(ulChildIdx);
}
}
if (arity == pbsPartConsumer->Size() &&
COperator::EopPhysicalSequence == exprhdl.Pop()->Eopid() &&
(*(exprhdl.Pgexpr()))[0]->FHasCTEProducer())
{
GPOS_ASSERT(2 == arity);
// this is a part index id that comes from both sides of a sequence
// with a CTE producer on the outer side, so pretend that part index
// id is not defined the inner sides
pbsPartConsumer->ExchangeClear(1);
}
if (!FCanPushPartReqToChild(pbsPartConsumer, child_index))
{
// clean up
pbsPartConsumer->Release();
continue;
}
// clean up
pbsPartConsumer->Release();
CPartKeysArray *pdrgppartkeys = exprhdl.GetRelationalProperties(child_index)->Ppartinfo()->PdrgppartkeysByScanId(part_idx_id);
GPOS_ASSERT(NULL != pdrgppartkeys);
pdrgppartkeys->AddRef();
// push requirements to child node
ppimResult->AddRequiredPartPropagation(ppimReqd, part_idx_id, CPartIndexMap::EppraPreservePropagators, pdrgppartkeys);
// check if there is a filter on the part index id and propagate that further down
if (ppfmReqd->FContainsScanId(part_idx_id))
{
CExpression *pexpr = ppfmReqd->Pexpr(part_idx_id);
// if the current child is inner child and the predicate is IsNull check and the parent is outer join,
// don't push IsNull check predicate to the partition filter.
// for all the other cases, push the filter down.
if (!(1 == child_index &&
CUtils::FScalarNullTest(pexpr) &&
CUtils::FPhysicalOuterJoin(exprhdl.Pop()))
)
{
pexpr->AddRef();
ppfmResult->AddPartFilter(mp, part_idx_id, pexpr, NULL /*stats */);
}
}
}
pdrgpul->Release();
return GPOS_NEW(mp) CPartitionPropagationSpec(ppimResult, ppfmResult);
}
//---------------------------------------------------------------------------
// @function:
// CPhysicalPartitionSelector::PppsRequired
//
// @doc:
// Compute required partition propagation of the n-th child
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysicalPartitionSelector::PppsRequired
(
IMemoryPool *pmp,
CExpressionHandle & exprhdl,
CPartitionPropagationSpec *pppsRequired,
ULONG
#ifdef GPOS_DEBUG
ulChildIndex
#endif // GPOS_DEBUG
,
DrgPdp *, //pdrgpdpCtxt,
ULONG //ulOptReq
)
{
GPOS_ASSERT(0 == ulChildIndex);
GPOS_ASSERT(NULL != pppsRequired);
CPartIndexMap *ppimInput = pppsRequired->Ppim();
CPartFilterMap *ppfmInput = pppsRequired->Ppfm();
DrgPul *pdrgpulInputScanIds = ppimInput->PdrgpulScanIds(pmp);
CPartIndexMap *ppim = GPOS_NEW(pmp) CPartIndexMap(pmp);
CPartFilterMap *ppfm = GPOS_NEW(pmp) CPartFilterMap(pmp);
CPartInfo *ppartinfo = exprhdl.Pdprel(0)->Ppartinfo();
const ULONG ulScanIds = pdrgpulInputScanIds->UlLength();
for (ULONG ul = 0; ul < ulScanIds; ul++)
{
ULONG ulScanId = *((*pdrgpulInputScanIds)[ul]);
ULONG ulExpectedPropagators = ppimInput->UlExpectedPropagators(ulScanId);
if (ulScanId == m_ulScanId)
{
// partition propagation resolved - do not need to require from children
continue;
}
if (!ppartinfo->FContainsScanId(ulScanId) && ppartinfo->FContainsScanId(m_ulScanId))
{
// dynamic scan for the required id not defined below, but the current one is: do not push request down
continue;
}
IMDId *pmdid = ppimInput->PmdidRel(ulScanId);
DrgPpartkeys *pdrgppartkeys = ppimInput->Pdrgppartkeys(ulScanId);
PartCnstrMap *ppartcnstrmap = ppimInput->Ppartcnstrmap(ulScanId);
CPartConstraint *ppartcnstr = ppimInput->PpartcnstrRel(ulScanId);
CPartIndexMap::EPartIndexManipulator epim = ppimInput->Epim(ulScanId);
pmdid->AddRef();
pdrgppartkeys->AddRef();
ppartcnstrmap->AddRef();
ppartcnstr->AddRef();
ppim->Insert(ulScanId, ppartcnstrmap, epim, ulExpectedPropagators, pmdid, pdrgppartkeys, ppartcnstr);
(void) ppfm->FCopyPartFilter(m_pmp, ulScanId, ppfmInput);
}
// cleanup
pdrgpulInputScanIds->Release();
return GPOS_NEW(pmp) CPartitionPropagationSpec(ppim, ppfm);
}
//---------------------------------------------------------------------------
// @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;
}
//---------------------------------------------------------------------------
// @function:
// CPhysicalNLJoin::PppsRequiredNLJoinChild
//
// @doc:
// Compute required partition propagation of the n-th child
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysicalNLJoin::PppsRequiredNLJoinChild
(
IMemoryPool *pmp,
CExpressionHandle &exprhdl,
CPartitionPropagationSpec *pppsRequired,
ULONG ulChildIndex,
DrgPdp *, //pdrgpdpCtxt,
ULONG ulOptReq
)
{
GPOS_ASSERT(NULL != pppsRequired);
if (1 == ulOptReq)
{
// request (1): push partition propagation requests to join's children,
// do not consider possible dynamic partition elimination using join predicate here,
// this is handled by optimization request (0) below
return CPhysical::PppsRequiredPushThruNAry(pmp, exprhdl, pppsRequired, ulChildIndex);
}
GPOS_ASSERT(0 == ulOptReq);
CPartIndexMap *ppim = pppsRequired->Ppim();
CPartFilterMap *ppfm = pppsRequired->Ppfm();
DrgPul *pdrgpul = ppim->PdrgpulScanIds(pmp);
CPartIndexMap *ppimResult = GPOS_NEW(pmp) CPartIndexMap(pmp);
CPartFilterMap *ppfmResult = GPOS_NEW(pmp) CPartFilterMap(pmp);
CPartInfo *ppartinfoOuter = exprhdl.Pdprel(0)->Ppartinfo();
CColRefSet *pcrsOutputOuter = exprhdl.Pdprel(0)->PcrsOutput();
CColRefSet *pcrsOutputInner = exprhdl.Pdprel(1)->PcrsOutput();
const ULONG ulPartIndexIds = pdrgpul->UlLength();
for (ULONG ul = 0; ul < ulPartIndexIds; ul++)
{
ULONG ulPartIndexId = *((*pdrgpul)[ul]);
if (ppfm->FContainsScanId(ulPartIndexId))
{
GPOS_ASSERT(NULL != ppfm->Pexpr(ulPartIndexId));
// a selection-based propagation request pushed from above: do not propagate any
// further as the join will reduce cardinality and thus may select more partitions
// for scanning
continue;
}
BOOL fOuterPartConsumer = ppartinfoOuter->FContainsScanId(ulPartIndexId);
// in order to find interesting join predicates that can be used for DPE,
// one side of the predicate must be the partition key, while the other side must only contain
// references from the join child that does not have the partition consumer
CColRefSet *pcrsAllowedRefs = pcrsOutputOuter;
if (fOuterPartConsumer)
{
pcrsAllowedRefs = pcrsOutputInner;
}
if (0 == ulChildIndex && fOuterPartConsumer)
{
// always push through required partition propagation for consumers on the
// outer side of the nested loop join
DrgPpartkeys *pdrgppartkeys = ppartinfoOuter->PdrgppartkeysByScanId(ulPartIndexId);
GPOS_ASSERT(NULL != pdrgppartkeys);
pdrgppartkeys->AddRef();
ppimResult->AddRequiredPartPropagation(ppim, ulPartIndexId, CPartIndexMap::EppraPreservePropagators, pdrgppartkeys);
}
else
{
// check if there is an interesting condition involving the partition key
CExpression *pexprScalar = exprhdl.PexprScalarChild(2 /*ulChildIndex*/);
AddFilterOnPartKey(pmp, true /*fNLJoin*/, pexprScalar, ppim, ppfm, ulChildIndex, ulPartIndexId, fOuterPartConsumer, ppimResult, ppfmResult, pcrsAllowedRefs);
}
}
pdrgpul->Release();
return GPOS_NEW(pmp) CPartitionPropagationSpec(ppimResult, ppfmResult);
}
//---------------------------------------------------------------------------
// @function:
// CPhysicalHashJoin::PppsRequiredCompute
//
// @doc:
// Compute required partition propagation of the n-th child
//
//---------------------------------------------------------------------------
CPartitionPropagationSpec *
CPhysicalHashJoin::PppsRequiredCompute
(
IMemoryPool *pmp,
CExpressionHandle &exprhdl,
CPartitionPropagationSpec *pppsRequired,
ULONG ulChildIndex
)
{
CPartIndexMap *ppim = pppsRequired->Ppim();
CPartFilterMap *ppfm = pppsRequired->Ppfm();
DrgPul *pdrgpul = ppim->PdrgpulScanIds(pmp);
CPartIndexMap *ppimResult = GPOS_NEW(pmp) CPartIndexMap(pmp);
CPartFilterMap *ppfmResult = GPOS_NEW(pmp) CPartFilterMap(pmp);
// get outer partition consumers
CPartInfo *ppartinfo = exprhdl.Pdprel(0)->Ppartinfo();
CColRefSet *pcrsOutputOuter = exprhdl.Pdprel(0)->PcrsOutput();
CColRefSet *pcrsOutputInner = exprhdl.Pdprel(1)->PcrsOutput();
const ULONG ulPartIndexIds = pdrgpul->UlLength();
for (ULONG ul = 0; ul < ulPartIndexIds; ul++)
{
ULONG ulPartIndexId = *((*pdrgpul)[ul]);
if (ppfm->FContainsScanId(ulPartIndexId))
{
GPOS_ASSERT(NULL != ppfm->Pexpr(ulPartIndexId));
// a selection-based propagation request pushed from above: do not propagate any
// further as the join will reduce cardinality and thus may select more partitions
// for scanning
continue;
}
BOOL fOuterPartConsumer = ppartinfo->FContainsScanId(ulPartIndexId);
// in order to find interesting join predicates that can be used for DPE,
// one side of the predicate must be the partition key, while the other side must only contain
// references from the join child that does not have the partition consumer
CColRefSet *pcrsAllowedRefs = pcrsOutputOuter;
if (fOuterPartConsumer)
{
pcrsAllowedRefs = pcrsOutputInner;
}
if (1 == ulChildIndex && !fOuterPartConsumer)
{
// always push through required partition propagation for consumers on the
// inner side of the hash join
DrgPpartkeys *pdrgppartkeys = exprhdl.Pdprel(1 /*ulChildIndex*/)->Ppartinfo()->PdrgppartkeysByScanId(ulPartIndexId);
GPOS_ASSERT(NULL != pdrgppartkeys);
pdrgppartkeys->AddRef();
ppimResult->AddRequiredPartPropagation(ppim, ulPartIndexId, CPartIndexMap::EppraPreservePropagators, pdrgppartkeys);
}
else
{
// look for a filter on the part key
CExpression *pexprScalar = exprhdl.PexprScalarChild(2 /*ulChildIndex*/);
AddFilterOnPartKey(pmp, false /*fNLJoin*/, pexprScalar, ppim, ppfm, ulChildIndex, ulPartIndexId, fOuterPartConsumer, ppimResult, ppfmResult, pcrsAllowedRefs);
}
}
pdrgpul->Release();
return GPOS_NEW(pmp) CPartitionPropagationSpec(ppimResult, ppfmResult);
}