How to query Json array in jsonb in Postgresql

Question

I have a jsonb column which have following rows

ROW1:

 [
        {
            "cpe23Uri": "cpe:2.3:a:sgi:irix:3.55:*:*:*:*:*:*:*",
            "active": true
        },
        {
            "cpe23Uri": "cpe:2.3:a:university_of_washington:imap:10.234:*:*:*:*:*:*:*",
            "active": true
        }
    ]

ROW 2:

 []

ROW 3:

[
    {
        "cpe23Uri": "cpe:2.3:o:sgi:irix:*:*:*:*:*:*:*:*",
        "active": true
    }
]

I want to find the rows which contain sgi:irix in the key cpe23Uri

Which query should i use for best performance?

Answer 1

You could use an exists condition with a correlated subquery that uses jsonb_array_element() to unnest and search the array:

select *
from mytable t
where exists (
    select 1
    from jsonb_array_elements(t.js) x
    where  x->>'cpe23Uri' like '%sgi:irix%'
);

Demo on DB Fiddle