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Posted to issues@flink.apache.org by "xuyangzhong (Jira)" <ji...@apache.org> on 2021/10/09 09:50:00 UTC

[jira] [Commented] (FLINK-24492) incorrect implicit type conversion between numeric and (var)char

    [ https://issues.apache.org/jira/browse/FLINK-24492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17426562#comment-17426562 ] 

xuyangzhong commented on FLINK-24492:
-------------------------------------

link https://issues.apache.org/jira/browse/FLINK-18234

> incorrect implicit type conversion between numeric and (var)char
> ----------------------------------------------------------------
>
>                 Key: FLINK-24492
>                 URL: https://issues.apache.org/jira/browse/FLINK-24492
>             Project: Flink
>          Issue Type: Bug
>            Reporter: xuyangzhong
>            Priority: Minor
>
> The result of the sql "select 1 = '1'" is false. This is caused by the CodeGen. CodeGen  incorrectly transform this "=" to "BinaryStringData.equals (int 1)". And "<>" has the same wrong result.
> In my opinion, "=" should have the same behavior with ">" and "<", which have the correct results. So before calcite solves this bug, we'd better temporarily forbidding this implicit type conversion in "=" and "<>".



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