Postgres: How to convert a json string to text?

Question

Json value may consist of a string value. eg.:

postgres=# SELECT to_json(\'Some \"text\"\'::TEXT);
     to_json
-----------------
 \"Some \\\"text\\\"\"
         


        

Answer 1

Mr. Curious was curious about this as well. In addition to the #>> '{}' operator, in 9.6+ one can get the value of a jsonb string with the ->> operator:

select to_jsonb('Some "text"'::TEXT)->>0;
  ?column?
-------------
 Some "text"
(1 row)

If one has a json value, then the solution is to cast into jsonb first:

select to_json('Some "text"'::TEXT)::jsonb->>0;
  ?column?
-------------
 Some "text"
(1 row)