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https://issues.apache.org/jira/browse/IMPALA-14127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17982678#comment-17982678
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Fang-Yu Rao commented on IMPALA-14127:
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The support for IGNORE NULLS in Apache Calcite was added in CALCITE-883. We may
be able to find helpful information there.
> Support IGNORE NULLS for functions
> ----------------------------------
>
> Key: IMPALA-14127
> URL: https://issues.apache.org/jira/browse/IMPALA-14127
> Project: IMPALA
> Issue Type: Sub-task
> Reporter: Fang-Yu Rao
> Assignee: Fang-Yu Rao
> Priority: Major
>
> Currently the following query that has "{{{}IGNORE NULLS{}}}" as part of a
> function parameter is not supported by the Calcite planner in Impala. It
> would be good to support it.
> {code:java}
> SELECT last_value(tinyint_col IGNORE NULLS) OVER (ORDER BY tinyint_col ASC)
> FROM functional_parquet.alltypesagg WHERE id < 5
> {code}
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