Sqlalchemy 使用 LIKE 查询数组列

Question

I have table File with column file_names which is ARRAY type. W would like to build query searching records where any of array element is like "abc*" using wildcard.

I tried:

File.names.any("abc%", operator= operators.like_op).all()

but it doesn't work. It return sql:

SELECT file.id, file.names FROM file WHERE 'abc%' LIKE ANY(file.names)

but it return empty result. Do you have any suggestions, how to build such query?

Answer 1

the like operator applies to a text, not to an array, so you need to find a way to convert your array into text before applying the like operator. To do so in sql you can use array_to_string() function, see the manual .

Answer 2

I found solution in SQL:

SELECT file.id, file.names FROM file WHERE EXISTS (SELECT 1 FROM unnest(file.names) AS n
WHERE n LIKE 'abc%')

and it works. But I don't know how to ask such query in sqlalchemy. Any ideas?