Re: Overcoming Initcap Function limitations?
Bo Guo <bo.guo@gisticinc.com>
From: Bo Guo <bo.guo@gisticinc.com>
To: Steve Midgley <science@misuse.org>
Cc: Greg Sabino Mullane <htamfids@gmail.com>, pgsql-sql@lists.postgresql.org
Date: 2023-12-05T01:39:18Z
Lists: pgsql-sql
Thank you, Steve and Greg! Your suggestions open up new potentials for me to explore. At this moment, I lean towards normalizing the database column values in upper case, thereby out-sourcing the case-changing responsibility to the front end. I would love to hear from your thoughts on this pattern. Cheers, Bo On Mon, Dec 4, 2023 at 11:39 AM Steve Midgley <science@misuse.org> wrote: > > > On Mon, Dec 4, 2023 at 10:09 AM Greg Sabino Mullane <htamfids@gmail.com> > wrote: > >> It's not clear exactly what you are trying to achieve, but you can use >> Postgres' built-in text searching system to exclude stopwords. For example: >> >> CREATE FUNCTION initcap_realword(myword TEXT) >> returns TEXT language SQL AS >> $$ >> SELECT CASE WHEN length(to_tsvector(myword)) < 1 >> THEN myword ELSE initcap(myword) END; >> $$; >> >> You could extend that to multi-word strings with a little effort. >> However, knowing that macdonald should be MacDonald requires a lot more >> intelligence than is provided by any Postgres built-in system or extension >> that I know of. What you are looking at is the field of science known as >> Natural Language Processing, which can get very complex very quickly. But >> for a Postgres answer, you might combine plpython3u with spacy ( >> https://spacy.io/usage/spacy-101). >> >> Cheers, >> Greg >> >> I've been having some pretty good experiences with "hard" text > transformations such as correct capitalization of names like MacDonald > using GPT 3.5 Turbo API which is pretty cheap for the volume of data I've > been working with.. Seems like Spacy might do similar things, and if it can > be run locally, might be much cheaper than a rental API.. > > Steve >