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https://issues.apache.org/jira/browse/CALCITE-2469?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16597037#comment-16597037
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Julian Hyde edited comment on CALCITE-2469 at 8/30/18 4:00 AM:
---------------------------------------------------------------
Fixed in
[90f49be6|http://git-wip-us.apache.org/repos/asf/calcite/commit/90f49be6].
Thanks for the PR, [~pzw2018]!
As mentioned, I also improved simplify of "f\(x) IS NULL" for other strong
functions "f".
was (Author: julianhyde):
Fixed in
[90f49be6|http://git-wip-us.apache.org/repos/asf/calcite/commit/90f49be6].
Thanks for the PR, [~pzw2018]!
As mentioned, I also improved simplify of "f(x) IS NULL" for other strong
functions.
> RexSimplify should optimize '(NOT x) IS NULL' to 'x IS NULL'
> ------------------------------------------------------------
>
> Key: CALCITE-2469
> URL: https://issues.apache.org/jira/browse/CALCITE-2469
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.17.0
> Reporter: pengzhiwei
> Assignee: Julian Hyde
> Priority: Critical
>
> The RexSimplify currently optimizes '(not x) is null' to 'x is not null'.
> However, this is incorrect. It is same to the case '(not x) is not null'.
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