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create table my_table (jsonfield json); insert into my_table values('{ "a": [ {"b": 1}, {"b": 2}, {"b": 3} ] }'); select (json_array_elements(t.jsonfield -> 'a') ->> 'b')::int as b_value, pg_typeof((json_array_elements(t.jsonfield -> 'a') ->> 'b')::int) from my_table t;

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