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Posted to issues@arrow.apache.org by "Neville Dipale (JIRA)" <ji...@apache.org> on 2019/02/17 01:28:00 UTC

[jira] [Updated] (ARROW-4596) [Rust] [DataFusion] Implement COUNT aggregate function

     [ https://issues.apache.org/jira/browse/ARROW-4596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Neville Dipale updated ARROW-4596:
----------------------------------
    Component/s: Rust - DataFusion
                 Rust

> [Rust] [DataFusion] Implement COUNT aggregate function
> ------------------------------------------------------
>
>                 Key: ARROW-4596
>                 URL: https://issues.apache.org/jira/browse/ARROW-4596
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Rust, Rust - DataFusion
>            Reporter: Andy Grove
>            Priority: Major
>              Labels: newbie
>             Fix For: 0.13.0
>
>
> Add support for COUNT aggregate function. See SUM function in aggregates.rs for inspiration.
> SQL parser should support COUNT(1) and COUNT(*) syntax for counting rows as well as COUNT(column_name) for counting non-null values for a column.



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