xuyangzhong commented on code in PR #27111:
URL: https://github.com/apache/flink/pull/27111#discussion_r2454429785
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flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/planner/plan/stream/sql/DeltaJoinTest.scala:
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@@ -188,6 +231,30 @@ class DeltaJoinTest extends TableTestBase {
"where a3 > b0")
}
+ @Test
+ def testFilterOnNonUpsertKeysAfterJoinWithCdcSourceWithoutDelete(): Unit = {
Review Comment:
Currently, we are unable to provide detailed error logs to explain why
optimization to Delta Join is not supported. For more information, please refer
to [FLINK-37954](https://issues.apache.org/jira/browse/FLINK-37954). As for
now, I think it's acceptable to display the original Join in the plan instead
of the DeltaJoin. WDYT?
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