Rails全文Postgres搜索：db中的索引是强制性的吗？

Question

Maybe is a stupid question, but I'm adding full text search to my small CMS.

I'm following the guide here and I have installed pg_search gem. I add the search function to my Content model and Product mode, and everything is working but is very very slow.

I don't add any index to my db table with migration: I'm searching on content.name and content.summary: do I need indexes too?

Answer 1

No, they aren't mandatory, but they will most likely speed up (significantly) the searches.

From the PostgreSQL docs:

Note that indexes are not mandatory for full text searching, but in cases where a column is searched on a regular basis, an index is usually desirable