I have developed an SQL query that obtains all posts in my site that contain certain keywords, but I’d like to restrict the posts to a specific category id. Does anyone know how to do that given that (it appears) category_id is not one of the fields in the “posts” table? Here is my query (which I have run and it works fine but it pulls from ALL posts and I only want posts from one category):
-- [params]
-- string_list :first_list_of_keywords
-- null string_list :second_list_of_keywords
WITH FirstFilter AS (
SELECT *
FROM posts
WHERE EXISTS (
SELECT 1
FROM UNNEST(ARRAY[:first_list_of_keywords]) AS s(word)
WHERE POSITION(LOWER(s.word) IN LOWER(posts.raw)) > 0
)
), SecondFilter AS (
SELECT *
FROM posts
WHERE NOT EXISTS (
-- Ensure there is NO missing keyword in the post text
SELECT 1
FROM UNNEST(ARRAY[:second_list_of_keywords]) AS t(word)
WHERE POSITION(LOWER(t.word) IN LOWER(posts.raw)) = 0
)
)
SELECT p.*
FROM posts p
INNER JOIN FirstFilter f ON p.id = f.id
INNER JOIN SecondFilter s ON p.id = s.id