On Mon, Oct 28, 2019 at 11:02 AM Shay Rojansky <roji@roji.org> wrote:
> Before PG12, select strpos('test', '') returns 1 (empty substring found at first position of the string), whereas
startingwith PG12 it returns 0 (empty substring not found).
>
> Is this behavior change intentional? If so, it doesn't seem to be documented in the release notes...
>
> First raised by Austin Drenski in https://github.com/npgsql/efcore.pg/pull/1068#issuecomment-546795826
It looks to me like this got broken here:
commit 9556aa01c69a26ca726d8dda8e395acc7c1e30fc
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: Fri Jan 25 16:25:05 2019 +0200
Use single-byte Boyer-Moore-Horspool search even with multibyte encodings.
Not sure what happened exactly.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
