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https://issues.apache.org/jira/browse/FLINK-9997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16638253#comment-16638253
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ASF GitHub Bot commented on FLINK-9997:
---------------------------------------
Xpray commented on a change in pull request #6455: [FLINK-9997] [table] Improve
Expression Reduce
URL: https://github.com/apache/flink/pull/6455#discussion_r222677511
##########
File path:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/plan/ExpressionReductionRulesTest.scala
##########
@@ -477,6 +476,22 @@ class ExpressionReductionRulesTest extends TableTestBase {
util.verifyTable(result, expected)
}
+ @Test
+ def testReduceDeterministicUDFInBatch(): Unit = {
+ val util = batchTestUtil()
+ val table = util.addTable[(Int, Long, String)]("MyTable", 'a, 'b, 'c)
+
+ // if isDeterministic = true, will cause a Calcite NPE, which will be
fixed in [CALCITE-1860]
Review comment:
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> Improve Expression Reduce
> -------------------------
>
> Key: FLINK-9997
> URL: https://issues.apache.org/jira/browse/FLINK-9997
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Ruidong Li
> Assignee: Ruidong Li
> Priority: Major
> Labels: pull-request-available
>
> There's no Calc node at normalize plans, so ReduceExpressionRule.CALC does
> not match any thing.
> If adding calc-related rules to normalize phase, then project-related rules
> and filter-related rules do not match any thing at logical opt phase. If
> adding ReduceExpressionRule.CALC to logical opt phase, it will increase the
> the search time. Therefore, adding a new phase after logical opt may be an
> option.
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