snuyanzin commented on code in PR #27250:
URL: https://github.com/apache/flink/pull/27250#discussion_r2545646914
##########
flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/physical/stream/FlinkMarkChangelogNormalizeProgram.java:
##########
@@ -149,27 +154,47 @@ public RelNode optimize(RelNode root,
StreamOptimizeContext context) {
continue;
}
- final Set<RexNode> common =
calculateCommonCondition(changelogNormalizeContexts);
+ final List<RexNode> commons =
+ calculateCommonCondition(rexBuilder,
changelogNormalizeContexts);
for (ChangelogNormalizeContext ctx : changelogNormalizeContexts) {
ctx.getChangelogNormalize().markSourceReuse();
- if (!common.isEmpty()) {
-
ctx.getChangelogNormalize().setCommonFilter(common.toArray(new RexNode[0]));
+ if (!commons.isEmpty()) {
+
ctx.getChangelogNormalize().setCommonFilter(commons.toArray(new RexNode[0]));
}
}
}
return root;
}
- private Set<RexNode> calculateCommonCondition(
- List<ChangelogNormalizeContext> changelogNormalizeContexts) {
- changelogNormalizeContexts.sort(Comparator.comparingInt(o ->
o.getConditions().size()));
- final Set<RexNode> common =
- new
HashSet<>(changelogNormalizeContexts.get(0).getConditions());
+ private List<RexNode> calculateCommonCondition(
Review Comment:
the only reason to refactor this code is memory issue in case of query with
huge list of conditions connected by `OR`
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