SELECT concat_ws(' ', a."my_column1") INTO c1;
SELECT concat_ws(' ', a."my_column2") INTO c2;
RETURN setweight(to_tsvector('pg_catalog.simple', c1), 'C') ||
       setweight(to_tsvector('pg_catalog.english', c2), 'D');

conn = psycopg2.connect("dbname='wrong_db' user='my_user' password='my_password'")
cur = conn.cursor()
cur.execute(sql_query)