Re: [EXTERNAL] Re: BUG #16835: btree index does not work for where clause using 'foo%'

Thanks, Tom.
Locale is en_US.UTF-8.

Is there plan to alter that behavior to allow index in non C locale?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Date: Friday, January 22, 2021 at 10:52 AM
To: "Zhang, Hongyan" <ZhangH3(at)aetna(dot)com>
Cc: "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: [EXTERNAL] Re: BUG #16835: btree index does not work for where clause using 'foo%'

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PG Bug reporting form <noreply(at)postgresql(dot)org> writes:
> https://www.postgresql.org/docs/11/indexes-types.html<https://www.postgresql.org/docs/11/indexes-types.html>, according to this
> page, btree index is supposed to work for where clause col like 'foo%', but
> does not work for me. we are on aurora postgres 11, I also tested on
> postgres 11, it does not work either.

As the manual explains, that will not work by default unless your
database locale is C (which is an uncommon default nowadays).

It's also possible that Aurora has changed something that keeps
it from working, but I'd investigate the locale angle first.

regards, tom lane

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