PostgreSQL full-text search with ranking not returning expected results
After trying multiple solutions online, I still can't figure this out..... I'm using PostgreSQL 13.2 and trying to implement a full-text search with ranking on a large dataset. I have a table called `documents` with a `tsvector` column named `search_vector` created from a `text` column named `content`. However, when I run my search query, the ranking seems off, and some relevant documents are not appearing as expected in the results. Here's the query I wrote: ```sql SELECT id, content, ts_rank(search_vector, query) AS rank FROM documents, to_tsquery('search & term') AS query WHERE search_vector @@ query ORDER BY rank DESC; ``` I have also created a GIN index on the `search_vector` column: ```sql CREATE INDEX idx_gin_search_vector ON documents USING GIN(search_vector); ``` The scenario arises when I search for common terms that I know exist in the `content`. For example, searching for 'hello & world' returns an empty result, while I can see entries in the database that should match those terms. Additionally, I tried using `plainto_tsquery` instead of `to_tsquery`, but the results didn't change much. When I adjust the ranking by trying different weights in `ts_rank`, it doesn't seem to affect the returned results positively either. I've checked the `search_vector` field and verified that it is populated correctly with the expected text. I also considered that the configuration might be affecting the text search, so I confirmed that I'm using the default text search configuration for English. Can anyone guide to understand why the ranking is not working as expected and why some documents are missing from the search results? Is there a better practice for setting up full-text search in PostgreSQL that could resolve this scenario? I'd really appreciate any guidance on this. This is part of a larger API I'm building. What's the best practice here? This is for a application running on Ubuntu 22.04. Any examples would be super helpful. I'm on Windows 11 using the latest version of Sql. Any examples would be super helpful.