On Tue, 2019-10-15 at 20:34 -0700, raylu wrote: On Tue, Oct 15, 2019 at 3:35 PM Alan Hodgson <ahodgson@xxxxxxxxxxxxxxx> wrote:My company has found the pg_trm extension to be more useful for partial text searches than the full text functions. I don't know specifically how it might help with your hyphens but it would be worth testing. The docs actually suggest using them in conjunction in some cases.We actually do use pg_trgm already for the names/titles of things.Indexing the content with a trigram index and then doingLOWER(content) LIKE '%789-xyz%' would certainly work, but1. we'd have to do a little bit of finagling if we wanted to match onword boundaries (don't match '6789-xyza' in the above example)2. trigram indexes are pretty huge for long documents, which is why wecurrently only use them for names/titlesWe may give up and just use pg_trgm for contents if nothing else worksout but it feels like the text search lexer is _so_ close to what wewant. Maybe you could have a trigger pull out those specific hypenated references into a separate column when the document is added or updated, and store/index those separately?
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