As discussed earlier, I changed the way we work with mergeopfamilies. I
use the "is_equality" flag to indicate whether the clause is an equality
one, and fill mergeopfamilies for both equality and inequality operators.
The updated patch is attached (rebased to 20b6552242).
--
Alexander Kuzmenkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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