XieJiann commented on code in PR #29609:
URL: https://github.com/apache/doris/pull/29609#discussion_r1444237599
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fe/fe-core/src/main/java/org/apache/doris/nereids/rules/exploration/mv/AbstractMaterializedViewRule.java:
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@@ -383,30 +396,87 @@ protected Expression rewriteExpression(Expression
sourceExpressionsToWrite, Plan
* For another example as following:
* predicate a = b in mv, and a = b and c = d in query, the compensatory
predicate is c = d
*/
- protected SplitPredicate predicatesCompensate(StructInfo queryStructInfo,
StructInfo viewStructInfo,
- SlotMapping queryToViewSlotMapping) {
+ protected SplitPredicate predicatesCompensate(
+ StructInfo queryStructInfo,
+ StructInfo viewStructInfo,
+ SlotMapping queryToViewSlotMapping,
+ ComparisonResult comparisonResult,
+ CascadesContext cascadesContext
+ ) {
+ // viewEquivalenceClass to query based
+ SlotMapping viewToQuerySlotMapping = queryToViewSlotMapping.inverse();
+ final Set<Expression> equalCompensateConjunctions =
compensateEquivalence(
+ queryStructInfo,
+ viewStructInfo,
+ viewToQuerySlotMapping,
+ comparisonResult);
+ // range compensate
+ final Set<Expression> rangeCompensatePredicates =
compensateRangePredicate(
+ queryStructInfo,
+ viewStructInfo,
+ viewToQuerySlotMapping,
+ comparisonResult);
+ // residual compensate
+ final Set<Expression> residualCompensatePredicates =
compensateResidualPredicate(
+ queryStructInfo,
+ viewStructInfo,
+ viewToQuerySlotMapping,
+ comparisonResult);
+ // if the join type in query and mv plan is different, we should check
and add filter on mv to make
+ // the mv join type is accord with query
+ Set<Set<Slot>> viewNoNullableSlot =
comparisonResult.getViewNoNullableSlot();
+ // check query is use the null reject slot which view comparison need
+ if (!viewNoNullableSlot.isEmpty()) {
+ Set<Expression> queryPulledUpPredicates =
queryStructInfo.getPredicates().getPulledUpPredicates();
+ Set<Expression> nullRejectPredicates =
ExpressionUtils.inferNotNull(queryPulledUpPredicates,
+ cascadesContext);
+ if (nullRejectPredicates.isEmpty() ||
queryPulledUpPredicates.containsAll(nullRejectPredicates)) {
+ // query has not null reject predicates, so return
+ return SplitPredicate.empty();
+ }
+ Set<Expression> queryUsedRejectNullSlotsViewBased =
nullRejectPredicates.stream()
+ .map(expression ->
TypeUtils.isNotNull(expression).orElse(null))
+ .filter(Objects::nonNull)
+ .map(expr -> ExpressionUtils.replace((Expression) expr,
+ queryToViewSlotMapping.toSlotReferenceMap()))
+ .collect(Collectors.toSet());
+ if (viewNoNullableSlot.stream().anyMatch(
+ set -> Sets.intersection(set,
queryUsedRejectNullSlotsViewBased).isEmpty())) {
+ return SplitPredicate.empty();
+ }
Review Comment:
what is splitPredicate meanings
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