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ASF GitHub Bot commented on FLINK-3579: --------------------------------------- Github user tillrohrmann commented on the pull request: https://github.com/apache/flink/pull/1821#issuecomment-202819063 As far as I can tell the changes look good. I had some inline comments where I'm not sure whether the implementation is exhaustive. > Improve String concatenation > ---------------------------- > > Key: FLINK-3579 > URL: https://issues.apache.org/jira/browse/FLINK-3579 > Project: Flink > Issue Type: Bug > Components: Table API > Reporter: Timo Walther > Assignee: ramkrishna.s.vasudevan > Priority: Minor > > Concatenation of a String and non-String does not work properly. > e.g. {{f0 + 42}} leads to RelBuilder Exception > ExpressionParser does not like {{f0 + 42.cast(STRING)}} either. -- This message was sent by Atlassian JIRA (v6.3.4#6332)