[ https://issues.apache.org/jira/browse/ARROW-4596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andy Grove resolved ARROW-4596. ------------------------------- Resolution: Fixed Issue resolved by pull request 4036 [https://github.com/apache/arrow/pull/4036] > [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 > Assignee: Luca Palmieri > Priority: Major > Labels: newbie, pull-request-available > Fix For: 0.14.0 > > Time Spent: 3h 40m > Remaining Estimate: 0h > > 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. > COUNT(DISTINCT expr) should be handled in a separate issue since it is more > complex. -- This message was sent by Atlassian JIRA (v7.6.3#76005)