godfreyhe commented on a change in pull request #13837:
URL: https://github.com/apache/flink/pull/13837#discussion_r515775965
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File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/rules/FlinkBatchRuleSets.scala
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@@ -222,10 +222,13 @@ object FlinkBatchRuleSets {
val JOIN_COND_EQUAL_TRANSFER_RULES: RuleSet = RuleSets.ofList((
RuleSets.ofList(JoinConditionEqualityTransferRule.INSTANCE).asScala ++
PREDICATE_SIMPLIFY_EXPRESSION_RULES.asScala ++
- FILTER_RULES.asScala ++
- RuleSets.ofList(JoinDeriveNullFilterRule.INSTANCE).asScala
+ FILTER_RULES.asScala
).asJava)
+ val JOIN_NULL_FILTER_RULES: RuleSet = RuleSets.ofList(
Review comment:
It's better `JOIN_PREDICATE_REWRITE_RULES` could reuse this rule set
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