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MDEV-10411 Providing compatibility for basic PL/SQL constructs

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Fixed that the ITERATE statement inside a FOR LOOP statement did not
increment the index variable before jumping to the beginning
of the loop, which caused the loop to repeat endlessly.
This commit is contained in:
Alexander Barkov
2016-08-24 12:30:27 +04:00
parent 2ea63492f7
commit 442ea81ed3
7 changed files with 317 additions and 0 deletions
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120
mysql-test/suite/compat/oracle/r/sp-code.result
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@ -677,3 +677,123 @@ SELECT f1(2, 3, 2, 3) FROM DUAL;
f1(2, 3, 2, 3)
2004
DROP FUNCTION f1;
# Testing labeled ITERATE in a labeled FOR LOOP
CREATE FUNCTION f1(a INT) RETURN INT
AS
total INT:= 0;
BEGIN
<<li>>
FOR i IN 1 .. a
LOOP
total:= total + 1000;
IF i = 5 THEN
ITERATE li;
END IF;
total:= total + 1;
END LOOP;
RETURN total;
END;
/
SHOW FUNCTION CODE f1;
Pos Instruction
0 set total@1 0
1 set i@2 1
2 set [upper_bound]@3 a@0
3 jump_if_not 11(11) (i@2 <= [upper_bound]@3)
4 set total@1 (total@1 + 1000)
5 jump_if_not 8(8) (i@2 = 5)
6 set i@2 (i@2 + 1)
7 jump 3
8 set total@1 (total@1 + 1)
9 set i@2 (i@2 + 1)
10 jump 3
11 freturn 3 total@1
SELECT f1(3), f1(4), f1(5), f1(6) FROM DUAL;
f1(3) f1(4) f1(5) f1(6)
3003 4004 5004 6005
DROP FUNCTION f1;
CREATE FUNCTION f1(a INT) RETURN INT
AS
total INT:= 0;
BEGIN
<<li>>
FOR i IN 1 .. a
LOOP
FOR j IN 1 .. 2
LOOP
total:= total + 1000;
IF i = 5 THEN
ITERATE li;
END IF;
total:= total + 1;
END LOOP;
END LOOP;
RETURN total;
END;
/
SHOW FUNCTION CODE f1;
Pos Instruction
0 set total@1 0
1 set i@2 1
2 set [upper_bound]@3 a@0
3 jump_if_not 16(16) (i@2 <= [upper_bound]@3)
4 set j@4 1
5 set [upper_bound]@5 2
6 jump_if_not 14(14) (j@4 <= [upper_bound]@5)
7 set total@1 (total@1 + 1000)
8 jump_if_not 11(11) (i@2 = 5)
9 set i@2 (i@2 + 1)
10 jump 3
11 set total@1 (total@1 + 1)
12 set j@4 (j@4 + 1)
13 jump 6
14 set i@2 (i@2 + 1)
15 jump 3
16 freturn 3 total@1
SELECT f1(3), f1(4), f1(5), f1(6) FROM DUAL;
f1(3) f1(4) f1(5) f1(6)
6006 8008 9008 11010
DROP FUNCTION f1;
CREATE FUNCTION f1(a INT) RETURN INT
AS
total INT:= 0;
BEGIN
<<lj>>
FOR j IN 1 .. 2
LOOP
<<li>>
FOR i IN 1 .. a
LOOP
total:= total + 1000;
IF i = 5 THEN
ITERATE li;
END IF;
total:= total + 1;
END LOOP;
END LOOP;
RETURN total;
END;
/
SHOW FUNCTION CODE f1;
Pos Instruction
0 set total@1 0
1 set j@2 1
2 set [upper_bound]@3 2
3 jump_if_not 16(16) (j@2 <= [upper_bound]@3)
4 set i@4 1
5 set [upper_bound]@5 a@0
6 jump_if_not 14(14) (i@4 <= [upper_bound]@5)
7 set total@1 (total@1 + 1000)
8 jump_if_not 11(11) (i@4 = 5)
9 set i@4 (i@4 + 1)
10 jump 6
11 set total@1 (total@1 + 1)
12 set i@4 (i@4 + 1)
13 jump 6
14 set j@2 (j@2 + 1)
15 jump 3
16 freturn 3 total@1
SELECT f1(3), f1(4), f1(5), f1(6) FROM DUAL;
f1(3) f1(4) f1(5) f1(6)
6006 8008 10008 12010
DROP FUNCTION f1;