On Mon, 2024-11-18 at 17:56 -0500, Tom Lane wrote:
> prepunion.c's plan_union_children(), which merges
> identically-propertied UNION operations into one, has this comment:
>
> * NOTE: currently, we ignore collations while determining if a child has
> * the same properties. This is semantically
prepunion.c's plan_union_children(), which merges
identically-propertied UNION operations into one, has this comment:
* NOTE: currently, we ignore collations while determining if a child has
* the same properties. This is semantically sound only so long as all
* collations have the same notion
