wenlong88 commented on a change in pull request #14916:
URL: https://github.com/apache/flink/pull/14916#discussion_r636710268
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File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/rules/logical/LogicalCorrelateToJoinFromTemporalTableFunctionRule.scala
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@@ -155,6 +155,7 @@ class LogicalCorrelateToJoinFromTemporalTableFunctionRule
case hep: HepRelVertex => getRelOptSchema(hep.getCurrentRel)
case single: SingleRel => getRelOptSchema(single.getInput)
case bi: BiRel => getRelOptSchema(bi.getLeft)
+ case union: Union => getRelOptSchema(union.getInput(0))
Review comment:
I think this fix still not completed, there are still some other
RelNodes would cause NPE, the fix like following may be better, what do you
think?
case relNode: RelNode if relNode.getInputs.isEmpty =>
relNode.getTable.getRelOptSchema
case _ => getRelOptSchema(relNode.getInput(0))
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