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https://issues.apache.org/jira/browse/CALCITE-1770?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15991468#comment-15991468
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Julian Hyde commented on CALCITE-1770:
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2 checkstyle violations, and I expect that maven-dependency-plugin will
complain because we don't explicitly include commons-lang.
ObjectUtils.toString is a small method but its behavior is not obvious. I would
just inline it and skip the use of commons-lang. What do you think.
> Filters with Null fail with NPE
> -------------------------------
>
> Key: CALCITE-1770
> URL: https://issues.apache.org/jira/browse/CALCITE-1770
> Project: Calcite
> Issue Type: Bug
> Components: druid
> Reporter: slim bouguerra
> Assignee: Julian Hyde
> Fix For: 1.13.0
>
>
> Following query fails with NPE
> {code} SELECT product_id from foodmart where product_id = NULL group by
> product_id {code}
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