Postgresql select where array overlaps using like - sql

Question

Is it possible to determine if an ARRAY column contains overlapping values from another array with the LIKE clause?
The && operator works but the strings have to be exact matches
q = """select * from articles where keywords && '{"mortgage brokers"}';""" // Exact match
Is it possible to filter the keywords where rows contain values with substring, not the full string? Something like:
q = """select * from articles where keywords && LIKE '{"mortgage"}';""" // HOW TO FILTER keywords containing value with substring

Answer 1

LIKE operates on strings. To check whether two arrays overlap, you can use &&.
From the Array Functions and Operators documentation:
&& : overlap (have elements in common)
SELECT ARRAY[1,4,3] && ARRAY[2,1] arrays_overlap;
| arrays_overlap |
| -------------- |
| true |
To see if there are values in an array that are LIKE those from another array, one solution would be to unnest both arrays and compare the results with LIKE:
SELECT EXISTS (
SELECT 1
FROM
unnest(ARRAY['abc', 'def' ]) my_array(x)
INNER JOIN unnest (ARRAY['a', 'z' ]) my_keywords(x)
ON my_array.x LIKE '%' || my_keywords.x || '%'
) arrays_have_similar_elements;
| arrays_have_similar_elements |
| ---------------------------- |
| true |
SELECT EXISTS (
SELECT 1
FROM
unnest(ARRAY['abc', 'def' ]) my_array(x)
INNER JOIN unnest (ARRAY['y', 'z' ]) my_keywords(x)
ON my_array.x LIKE '%' || my_keywords.x || '%'
) arrays_have_similar_elements;
| arrays_have_similar_elements |
| ---------------------------- |
| false |
Demo on DB Fiddle

Answer 2

Thanks to #GMB for the guidance. I was able to solve the problem using the query below.
SELECT * from articles, unnest(keywords) my_array(x)
INNER JOIN unnest(ARRAY['broker']) my_keywords(x)
ON my_array.x LIKE '%' || my_keywords.x || '%';