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https://issues.apache.org/jira/browse/CALCITE-6904?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17937229#comment-17937229
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Julian Hyde commented on CALCITE-6904:
--------------------------------------
Please be sure to use UPPER CASE for SQL keywords in the summary. Otherwise the
sentence is difficult to humans to parse.
> Is not distinct from conversion error in ElementerableJoinRule
> --------------------------------------------------------------
>
> Key: CALCITE-6904
> URL: https://issues.apache.org/jira/browse/CALCITE-6904
> Project: Calcite
> Issue Type: Bug
> Reporter: Zhen Chen
> Priority: Major
>
> The convert method of ElementerableJoinRule incorrectly converts the
> condition of `is not distinct from`, which is considered an equivalence
> condition in calcite and carries a `filterNulls` to save whether to perform
> equivalence processing on null. However, when converting to
> ElementerableJoin, the filterNulls are ignored, resulting in
> `is_not_distinct_from ($0, $1)` being converted to `=($0, $1)`.
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