Yijie Shen created FLINK-3736:
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Summary: Move toRexNode and toAggCall logic into Expressions
Key: FLINK-3736
URL: https://issues.apache.org/jira/browse/FLINK-3736
Project: Flink
Issue Type: Improvement
Components: Table API
Reporter: Yijie Shen
Priority: Minor
Since we have a one-to-one mapping from Flink Expression to Calcite RexNode,
and we will implement more and more expressions to make flink-table a
full-fledged module, I think it's worthwhile to let each Expression take care
of its own behaviour on conversion to RexNode.
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