[CALCITE-5280] Implement geometry aggregate functions

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.32.0
• Fix Version/s: 1.33.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Bertil Chapuis
• Reporter: Bertil Chapuis
• Created: 09/Sep/22 19:32
• Updated: 07/Feb/23 22:33
• Resolved: 16/Dec/22 11:08

Description

Geometry aggregate functions (ST_Accum, ST_Collect, and ST_Union) are currently missing in Calcite. Using an AggregateFunctionImpl looks be pretty straightforward, but many aggregate function implement SqlAggFunction directly.

julianhyde What would be the best way to implement them?

Issue Links

• relates to: CALCITE-5303 Add support for overloaded aggregate functions
• links to: GitHub Pull Request #2917
• links to: GitHub Pull Request #2989