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https://issues.apache.org/jira/browse/FLINK-9997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16635370#comment-16635370
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ASF GitHub Bot commented on FLINK-9997:
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twalthr commented on a change in pull request #6455: [FLINK-9997] [table]
Improve Expression Reduce
URL: https://github.com/apache/flink/pull/6455#discussion_r221923802
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File path:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/BatchTableEnvironment.scala
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@@ -480,11 +480,20 @@ abstract class BatchTableEnvironment(
normalizedPlan
}
- // 4. optimize the physical Flink plan
+ // 4. optimize the logical Flink plan
+ val flinkLogicalOptRuleSet = getFlinkLogicalOptRuleSet
Review comment:
I'm not sure about adding another step in the optimization phase. You
mentioned that "If adding ReduceExpressionRule.CALC to logical opt phase, it
will increase the the search time.", do you have numbers for this? Otherwise I
would add it to logical optimization phase because this is actually where it
belongs.
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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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