PostgreSQL JOIN with array type with array elements order, how to implement?

Question

I have two tables in database:

CREATE TABLE items(
 id SERIAL PRIMARY KEY,
 ... some other fields
);

This table contains come data row with

Answer 1

Probably normalizing your table would be the best advice I can give you.

The int_array contrib module has an idx function that will give you the int's index position in the array. Also there is an idx function on the snippets wiki that works for array's of any data types.

SELECT i.*, idx(id_items, i.id) AS idx
FROM some_chosen_data_in_order s
JOIN items i ON i.id = ANY(s.id_items)
ORDER BY idx(id_items, i.id)