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https://issues.apache.org/jira/browse/IMPALA-15399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18118129#comment-18118129
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Steve Carlin commented on IMPALA-15399:
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May or may not be related, but original planner returns a boolean type for
select NULL || NULL
Calcite planner is also returning null type here
> Calcite planner: NULL * NULL datatype doesn't match
> ---------------------------------------------------
>
> Key: IMPALA-15399
> URL: https://issues.apache.org/jira/browse/IMPALA-15399
> Project: IMPALA
> Issue Type: Bug
> Reporter: Steve Carlin
> Priority: Major
> Labels: small_calcite
>
> The exprs-test.cc file has some tests that are not in the e2e tests.
> One of them is testing the datatype returned by "NULL * NULL".
> The original planner returns DOUBLE whereas the Calcite Planner returns null.
> The expr-test file isn't completely working yet, but this can be replicated
> by creating a "select NULL * NULL" test within a ".test" file
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