aggregator.sql

CREATE OR REPLACE FUNCTION jsonb_merge_state(jsonb, jsonb)
returns jsonb
language sql
as $$
    SELECT $1 || $2
$$;

DROP AGGREGATE IF EXISTS jsonb_merge(jsonb);

CREATE AGGREGATE jsonb_merge(jsonb) (
    SFUNC = jsonb_merge_state,
    STYPE = jsonb,
    INITCOND = '{}'
)