The grid (core) ยท console.warn
this DuckDB connection has no prepare(), so ...
Printed by The grid (core), prefixed [lattice], since 1.17.0.
Warnings reference › source.duckdb.unprepared.grouped
- Identifier
source.duckdb.unprepared.grouped- Raised by
- The grid (core)
- Since
- 1.17.0
What happened
Grouped aggregates could not be pushed down, so no group-level aggregate values come back from the engine and the group rows show none.
The fix
Use a connection that implements prepare().
Reference
Covered in full at the API reference.