SELECT string_agg(trim(tdata::text, '"'), ', ') from jsonb_array_elements(CAST('[1 , 2]' as jsonb)) tdata.
postgresql-jsonb-to-string
text, Does the string exist as a top-level key within the JSON value? '{"a":1, "b":2}'::jsonb ? 'b' ?| text[], Do any of these array strings exist as top-level keys? '{"a":1 ... 939c2ea5af
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