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https://issues.apache.org/jira/browse/FLINK-33596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-33596:
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Labels: pull-request-available (was: )
> Support fold expression before transfer to RexNode
> --------------------------------------------------
>
> Key: FLINK-33596
> URL: https://issues.apache.org/jira/browse/FLINK-33596
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Hive
> Reporter: yunfan
> Priority: Major
> Labels: pull-request-available
>
> Hive will fold expression in optimization stage. But flink-hive-parser use
> flink optimization.
> And flink can't know some hive function can be constant value.
> It can be reproduce by follow sql
> {code:java}
> select distinct(dep), UNIX_TIMESTAMP() from employee {code}
> Some hive code reference:
> https://github.com/apache/hive/blob/rel/release-2.3.9/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/HiveRexExecutorImpl.java#L62
> https://github.com/apache/hive/blob/rel/release-2.3.9/ql/src/java/org/apache/hadoop/hive/ql/parse/CalcitePlanner.java#L1776
> https://github.com/apache/hive/blob/rel/release-2.3.9/ql/src/java/org/apache/hadoop/hive/ql/parse/CalcitePlanner.java#L1069
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