# MDEV-29370 Functions in packages are slow and seems to ignore deterministic
#
SET SQL_MODE=ORACLE;
CREATE TABLE t1 (c1 CHAR(1));
CREATE FUNCTION f1_deterministic()
RETURN CHAR(1)
DETERMINISTIC
IS
BEGIN
RETURN 'X';
END;
//
CREATE FUNCTION f2_not_deterministic()
RETURN CHAR(1)
IS
BEGIN
RETURN 'X';
END;
//
CREATE PACKAGE pkg1
IS
PROCEDURE t1_populate(numrows INTEGER);
FUNCTION f3_deterministic() RETURN CHAR(1) DETERMINISTIC;
FUNCTION f4_not_deterministic() RETURN CHAR(1);
END;
//
CREATE PACKAGE BODY pkg1
IS
PROCEDURE t1_populate(numrounds INTEGER)
IS
i INTEGER;
BEGIN
INSERT INTO t1 VALUES('Y');
FOR i IN 1..numrounds LOOP
INSERT INTO t1 SELECT * FROM t1;
END LOOP;
END;
FUNCTION f3_deterministic() RETURN CHAR(1) DETERMINISTIC COMMENT 'xxx'
IS
BEGIN
RETURN 'X';
END;
FUNCTION f4_not_deterministic() RETURN CHAR(1)
IS
BEGIN
RETURN 'X';
END;
END;
//
CALL pkg1.t1_populate(3);
EXPLAIN EXTENDED SELECT 'Deterministic function', COUNT(*) FROM t1 WHERE c1 = f1_deterministic();
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 100.00 Using where
Warnings:
Note 1003 select 'Deterministic function' AS "Deterministic function",count(0) AS "COUNT(*)" from "test"."t1" where "test"."t1"."c1" = <cache>("f1_deterministic"())
EXPLAIN EXTENDED SELECT 'Non-deterministic function', COUNT(*) FROM t1 WHERE c1 = f2_not_deterministic();
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 100.00 Using where
Warnings:
Note 1003 select 'Non-deterministic function' AS "Non-deterministic function",count(0) AS "COUNT(*)" from "test"."t1" where "test"."t1"."c1" = "f2_not_deterministic"()
EXPLAIN EXTENDED SELECT 'Deterministic package function', COUNT(*) FROM t1 WHERE c1 = pkg1.f3_deterministic();
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 100.00 Using where
Warnings:
Note 1003 select 'Deterministic package function' AS "Deterministic package function",count(0) AS "COUNT(*)" from "test"."t1" where "test"."t1"."c1" = <cache>("test"."pkg1"."f3_deterministic"())
EXPLAIN EXTENDED SELECT 'Non-deterministic package function', COUNT(*) FROM t1 WHERE c1 = pkg1.f4_not_deterministic();
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 100.00 Using where
Warnings:
Note 1003 select 'Non-deterministic package function' AS "Non-deterministic package function",count(0) AS "COUNT(*)" from "test"."t1" where "test"."t1"."c1" = "test"."pkg1"."f4_not_deterministic"()
