shuiqiangchen commented on code in PR #20745:
URL: https://github.com/apache/flink/pull/20745#discussion_r1030072896
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flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/logical/FlinkFilterJoinRule.java:
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@@ -128,7 +129,9 @@ protected void perform(RelOptRuleCall call, Filter filter,
Join join) {
joinType,
true,
!joinType.generatesNullsOnLeft(),
- !joinType.generatesNullsOnRight(),
+ !joinType.generatesNullsOnRight()
+ &&
!TemporalJoinUtil.containsInitialTemporalJoinCondition(
Review Comment:
Thanks! I added a `FlinkJoinReduceExpressionsRule` based on
`JoinReduceExpressionsRule` and skip the constant reduce when it is a temporal
join, it can solve the case.
And there is one more question that it seems processing time temporal is not
supported yet, do we only consider event time temporal join in this PR?
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