On Sun, 2020-11-15 at 05:53 +0000, Alexander Korotkov wrote:
> Handle equality operator in contrib/pg_trgm
> 
> Obviously, in order to equality operator be satisfiable, target string must
> contain all the trigrams of the search string.  On this base, we implement
> equality operator in GiST/GIN indexes with recheck.
> 
> Discussion: 
> https://postgr.es/m/CAOBaU_YWwtT7tdggtROacjdOdeYHCz-tmSwuC-j-TOG-g97J0w%40mail.gmail.com
> Author: Julien Rouhaud
> Reviewed-by: Tom Lane, Alexander Korotkov, Georgios Kokolatos, Erik Rijkers
> 
> Branch
> ------
> master
> 
> Details
> -------
> https://git.postgresql.org/pg/commitdiff/935f6666502250abde8615bc7805a6e5aa05a066

This causes bad query results with non-deterministic collations, see
https://postgr.es/m/[email protected]

Yours,
Laurenz Albe


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