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Posted to issues@flink.apache.org by "Timo Walther (JIRA)" <ji...@apache.org> on 2017/07/26 09:22:00 UTC

[jira] [Created] (FLINK-7271) ExpressionReducer does not optimize string-to-time conversion

Timo Walther created FLINK-7271:
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             Summary: ExpressionReducer does not optimize string-to-time conversion
                 Key: FLINK-7271
                 URL: https://issues.apache.org/jira/browse/FLINK-7271
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Timo Walther


Expressions like {{"1996-11-10".toDate}} or {{"1996-11-10 12:12:12".toTimestamp}} are not recognized by the ExpressionReducer and are evaluated during runtime instead of pre-flight phase. In order to optimize the runtime we should allow constant expression reduction here.



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