upgrade_part.sql

CREATE FUNCTION my_int4_sort(int4,int4) RETURNS int LANGUAGE sql
AS $$ SELECT CASE WHEN $1 = $2 THEN 0 WHEN $1 > $2 THEN 1 ELSE -1 END; $$;
CREATE OPERATOR CLASS test_int4_ops FOR TYPE int4 USING btree AS
  OPERATOR 1 < (int4,int4), OPERATOR 2 <= (int4,int4),
  OPERATOR 3 = (int4,int4), OPERATOR 4 >= (int4,int4),
  OPERATOR 5 > (int4,int4), FUNCTION 1 my_int4_sort(int4,int4);
CREATE TABLE partkey_t (a int4) PARTITION BY RANGE (a test_int4_ops);
CREATE TABLE partkey_t_1 PARTITION OF partkey_t FOR VALUES FROM (0) TO (1000);
INSERT INTO partkey_t VALUES (100);
INSERT INTO partkey_t VALUES (200);

-- additions
alter table partkey_t detach partition partkey_t_1;
alter table partkey_t attach partition partkey_t_1 for values
  from (0) to (1000);