pgsql: Allow to reset execGrouping.c style tuple hashtables.

2019-02-09 Thread Andres Freund
Allow to reset execGrouping.c style tuple hashtables. This has the advantage that the comparator expression, the table's slot, etc do not have to be rebuilt. Additionally the simplehash.h hashtable within the tuple hashtable now keeps its previous size and doesn't need to be reallocated. That both

pgsql: Allow to reset execGrouping.c style tuple hashtables.

2019-02-09 Thread Andres Freund
Allow to reset execGrouping.c style tuple hashtables. This has the advantage that the comparator expression, the table's slot, etc do not have to be rebuilt. Additionally the simplehash.h hashtable within the tuple hashtable now keeps its previous size and doesn't need to be reallocated. That both