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Posted to issues@calcite.apache.org by "Julian Hyde (Jira)" <ji...@apache.org> on 2023/09/16 23:24:00 UTC

[jira] [Assigned] (CALCITE-6008) ARRAY_AGG should returns ARRAY NULL when there's no input rows

     [ https://issues.apache.org/jira/browse/CALCITE-6008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Hyde reassigned CALCITE-6008:
------------------------------------

    Assignee: Jiabao Sun

> ARRAY_AGG should returns ARRAY NULL when there's no input rows
> --------------------------------------------------------------
>
>                 Key: CALCITE-6008
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6008
>             Project: Calcite
>          Issue Type: Bug
>    Affects Versions: 1.35.0
>            Reporter: Jiabao Sun
>            Assignee: Jiabao Sun
>            Priority: Major
>              Labels: pull-request-available
>
> ARRAY_AGG in BigQuery and Postgres returns NULL if there are zero input rows or expression evaluates to NULL for all rows.
> However, it will return `ARRAY<arg0> NOT NULL` in the return type of the function definition.
> [https://cloud.google.com/bigquery/docs/reference/standard-sql/aggregate_functions#array_agg]
> [https://www.postgresql.org/docs/8.4/functions-aggregate.html]



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