Bertil Chapuis created CALCITE-5280:
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Summary: Implement geometry aggregate functions
Key: CALCITE-5280
URL: https://issues.apache.org/jira/browse/CALCITE-5280
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Bertil Chapuis
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.
What would be the best way to implement them?
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