blob: 21fac1939bcab857d14c352e1caec2e41d731015 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
SET sql_mode=ORACLE;
create aggregate function f1(x INT) return INT AS
begin
insert into t1(sal) values (x);
return x;
end|
ERROR HY000: Aggregate specific instruction(FETCH GROUP NEXT ROW) missing from the aggregate function
create function f1(x INT) return INT AS
begin
set x=5;
fetch group next row;
return x+1;
end |
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
CREATE TABLE marks(stud_id INT, grade_count INT);
INSERT INTO marks VALUES (1,6), (2,4), (3,7), (4,5), (5,8);
SELECT * FROM marks;
stud_id grade_count
1 6
2 4
3 7
4 5
5 8
# Using PL/SQL syntax: EXCEPTION WHEN NO_DATA_FOUND
CREATE AGGREGATE FUNCTION IF NOT EXISTS aggregate_count(x INT) RETURN INT AS
count_students INT DEFAULT 0;
BEGIN
LOOP
FETCH GROUP NEXT ROW;
IF x THEN
count_students:= count_students + 1;
END IF;
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
RETURN count_students;
END aggregate_count //
SELECT aggregate_count(stud_id) FROM marks;
aggregate_count(stud_id)
5
DROP FUNCTION IF EXISTS aggregate_count;
# Using SQL/PSM systax: CONTINUE HANDLER
CREATE AGGREGATE FUNCTION IF NOT EXISTS aggregate_count(x INT) RETURN INT AS
count_students INT DEFAULT 0;
CONTINUE HANDLER FOR NOT FOUND RETURN count_students;
BEGIN
LOOP
FETCH GROUP NEXT ROW;
IF x THEN
SET count_students= count_students + 1;
END IF;
END LOOP;
END //
SELECT aggregate_count(stud_id) FROM marks;
aggregate_count(stud_id)
5
DROP FUNCTION IF EXISTS aggregate_count;
DROP TABLE marks;
#
# MDEV-18813 PROCEDURE and anonymous blocks silently ignore FETCH GROUP NEXT ROW
#
CREATE PROCEDURE p1 AS
BEGIN
FETCH GROUP NEXT ROW;
END;
$$
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
BEGIN NOT ATOMIC
FETCH GROUP NEXT ROW;
END;
$$
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
CREATE DEFINER=root@localhost FUNCTION f1 RETURN INT AS
BEGIN
FETCH GROUP NEXT ROW;
RETURN 0;
END;
$$
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
CREATE TABLE t1 (a INT);
CREATE TRIGGER tr1
AFTER INSERT ON t1 FOR EACH ROW
FETCH GROUP NEXT ROW;
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
DROP TABLE t1;
CREATE EVENT ev1
ON SCHEDULE EVERY 1 HOUR
STARTS CURRENT_TIMESTAMP + INTERVAL 1 MONTH
ENDS CURRENT_TIMESTAMP + INTERVAL 1 MONTH + INTERVAL 1 WEEK
DO FETCH GROUP NEXT ROW;
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
CREATE PACKAGE pkg1 AS
PROCEDURE p1;
FUNCTION f1 RETURN INT;
END;
$$
CREATE PACKAGE BODY pkg1 AS
PROCEDURE p1 AS
BEGIN
FETCH GROUP NEXT ROW; -- In a package procedure
END;
FUNCTION f1 RETURN INT AS
BEGIN
RETURN 0;
END;
END;
$$
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
CREATE PACKAGE BODY pkg1 AS
PROCEDURE p1 AS
BEGIN
NULL;
END;
FUNCTION f1 RETURN INT AS
BEGIN
FETCH GROUP NEXT ROW; -- In a package function
RETURN 0;
END;
END;
$$
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
CREATE PACKAGE BODY pkg1 AS
PROCEDURE p1 AS
BEGIN
NULL;
END;
FUNCTION f1 RETURN INT AS
BEGIN
RETURN 0;
END;
BEGIN
FETCH GROUP NEXT ROW; -- In a package executable section
END;
$$
ERROR HY000: Aggregate specific instruction (FETCH GROUP NEXT ROW) used in a wrong context
DROP PACKAGE pkg1;
|
