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Extract limitPushdownRules #8989

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Merged
findepi merged 1 commit into from
Aug 27, 2021
Merged

Extract limitPushdownRules #8989

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15 changes: 9 additions & 6 deletions core/trino-main/src/main/java/io/trino/sql/planner/PlanOptimizers.java
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Original file line number Diff line number Diff line change
Expand Up @@ -378,6 +378,14 @@ public PlanOptimizers(
new PushDownDereferencesThroughRowNumber(typeAnalyzer),
new PushDownDereferencesThroughTopNRanking(typeAnalyzer));

Set<Rule<?>> limitPushdownRules = ImmutableSet.of(
new PushLimitThroughOffset(),
new PushLimitThroughProject(typeAnalyzer),
new PushLimitThroughMarkDistinct(),
new PushLimitThroughOuterJoin(),
new PushLimitThroughSemiJoin(),
new PushLimitThroughUnion());

IterativeOptimizer inlineProjections = new IterativeOptimizer(
metadata,
ruleStats,
Expand Down Expand Up @@ -445,6 +453,7 @@ public PlanOptimizers(
ImmutableSet.<Rule<?>>builder()
.addAll(columnPruningRules)
.addAll(projectionPushdownRules)
.addAll(limitPushdownRules)
.addAll(new UnwrapRowSubscript().rules())
.addAll(new PushCastIntoRow().rules())
.addAll(ImmutableSet.of(
Expand All @@ -458,16 +467,10 @@ public PlanOptimizers(
new RemoveFullSample(),
new EvaluateZeroSample(),
new PushOffsetThroughProject(),
new PushLimitThroughOffset(),
new PushLimitThroughProject(typeAnalyzer),
new MergeLimits(),
new MergeLimitWithSort(),
new MergeLimitOverProjectWithSort(),
new MergeLimitWithTopN(),
new PushLimitThroughMarkDistinct(),
new PushLimitThroughOuterJoin(),
new PushLimitThroughSemiJoin(),
new PushLimitThroughUnion(),
new RemoveTrivialFilters(),
new RemoveRedundantLimit(),
new RemoveRedundantOffset(),
Expand Down