Re: Full text search randomly not working for short prefixes?

Thanks, that makes sense. I think I'll go with the cast approach, I
don't really need stemming anywhere.

Tom Lane je 02. 12. 2016 ob 16:33 napisal:
> cen <imbacen(at)gmail(dot)com> writes:
>> Something funny going on with my full text search.. and I have no idea what.
> The way to debug this sort of thing is generally to look at what tsquery
> you're actually getting. I get
>
> regression=# select to_tsquery(unaccent('a:*'));
> NOTICE: text-search query contains only stop words or doesn't contain lexemes, ignored
> to_tsquery
> ------------
>
> (1 row)
>
> regression=# select to_tsquery(unaccent('an:*'));
> NOTICE: text-search query contains only stop words or doesn't contain lexemes, ignored
> to_tsquery
> ------------
>
> (1 row)
>
> regression=# select to_tsquery(unaccent('ana:*'));
> to_tsquery
> ------------
> 'ana':*
> (1 row)
>
> Of course, only the last is going to match 'ana'.
>
> So you need to use a text search configuration in which a/an are
> not stop words. Or possibly you could cast the unaccent result
> directly to tsquery rather than passing it through to_tsquery(),
> though likely that would just have a different set of failure modes
> with queries where you do wish stemming would occur.
>
> The problem with "no" seems to be the same.
>
> regards, tom lane