[#FLINK-33596][Connectors/Hive]] Fold expression before transfer function to RexNode. #23759
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What is the purpose of the change
Fold expression before transfer function to RexNode.
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.
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
Brief change log
Try to transfer to constant before function transfer to rexNode.
Verifying this change
This change is verified by added test
Does this pull request potentially affect one of the following parts:
@Public(Evolving)
: (no)Documentation