[ARROW-11431] [Rust] [DataFusion] Add support for the SQL HAVING clause

• Type: New Feature
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: Rust - DataFusion
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27317
• Assignee: Daniel Russo
• Reporter: Daniel Russo
• Created: 29/Jan/21 18:59
• Updated: 11/Jan/23 08:19
• Resolved: 03/Feb/21 18:38

Description

We do not yet have support for the SQL HAVING clause. HAVING is used to filter post-aggregation, typically against an aggregated column. For example:

SELECT c1, MAX(c2) FROM t GROUP BY c1 HAVING MAX(c2) > 100

HAVING expressions need not reference aggregates in the SELECT, for example:

SELECT c1, MAX(c2) FROM t GROUP BY c1 HAVING MIN(c2) > 100

HAVING expressions need not filter on aggregated columns, for example:

SELECT c1, MAX(c2) FROM t GROUP BY c1 HAVING c1 > 100

Lastly, HAVING expressions need not be used in conjunction with a GROUP BY, for example:

SELECT MAX(c1) FROM t HAVING MAX(c1) > 100

Issue Links

• links to: GitHub Pull Request #9364