Benjamin Tingle <b...@tingle.org> writes:
> Interesting. Why is it impossible to prune hash partitions? Maybe prune
> isn’t the best word, more so use to advantage. At the very least, it should
> be possible to utilize a parallel insert against a table partitioned by
> hash. (Partition query rows, then distribute these rows to parallel workers)

Your plan-shape complaint had nothing to do with insertions; it had
to do with joining the partitioned table to another table.  That
join can't be optimized.

                        regards, tom lane


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