blob: 0affc4efa297478367a902a3b40d6da2114ea4f4 (
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
SET sql_mode=ORACLE;
delimiter |;
--error ER_INVALID_AGGREGATE_FUNCTION
create aggregate function f1(x INT) return INT AS
begin
insert into t1(sal) values (x);
return x;
end|
--error ER_NOT_AGGREGATE_FUNCTION
create function f1(x INT) return INT AS
begin
set x=5;
fetch group next row;
return x+1;
end |
DELIMITER ;|
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;
--echo # Using PL/SQL syntax: EXCEPTION WHEN NO_DATA_FOUND
DELIMITER //;
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 //
DELIMITER ;//
SELECT aggregate_count(stud_id) FROM marks;
DROP FUNCTION IF EXISTS aggregate_count;
--echo # Using SQL/PSM systax: CONTINUE HANDLER
DELIMITER //;
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 //
DELIMITER ;//
SELECT aggregate_count(stud_id) FROM marks;
DROP FUNCTION IF EXISTS aggregate_count;
DROP TABLE marks;
--echo #
--echo # MDEV-18813 PROCEDURE and anonymous blocks silently ignore FETCH GROUP NEXT ROW
--echo #
DELIMITER $$;
--error ER_NOT_AGGREGATE_FUNCTION
CREATE PROCEDURE p1 AS
BEGIN
FETCH GROUP NEXT ROW;
END;
$$
DELIMITER ;$$
DELIMITER $$;
--error ER_NOT_AGGREGATE_FUNCTION
BEGIN NOT ATOMIC
FETCH GROUP NEXT ROW;
END;
$$
DELIMITER ;$$
DELIMITER $$;
--error ER_NOT_AGGREGATE_FUNCTION
CREATE DEFINER=root@localhost FUNCTION f1 RETURN INT AS
BEGIN
FETCH GROUP NEXT ROW;
RETURN 0;
END;
$$
DELIMITER ;$$
CREATE TABLE t1 (a INT);
--error ER_NOT_AGGREGATE_FUNCTION
CREATE TRIGGER tr1
AFTER INSERT ON t1 FOR EACH ROW
FETCH GROUP NEXT ROW;
DROP TABLE t1;
--error ER_NOT_AGGREGATE_FUNCTION
CREATE EVENT ev1
ON SCHEDULE EVERY 1 HOUR
STARTS CURRENT_TIMESTAMP + INTERVAL 1 MONTH
ENDS CURRENT_TIMESTAMP + INTERVAL 1 MONTH + INTERVAL 1 WEEK
DO FETCH GROUP NEXT ROW;
DELIMITER $$;
CREATE PACKAGE pkg1 AS
PROCEDURE p1;
FUNCTION f1 RETURN INT;
END;
$$
--error ER_NOT_AGGREGATE_FUNCTION
CREATE PACKAGE BODY pkg1 AS
PROCEDURE p1 AS
BEGIN
FETCH GROUP NEXT ROW; -- In a package procedure
END;
FUNCTION f1 RETURN INT AS
BEGIN
RETURN 0;
END;
END;
$$
--error ER_NOT_AGGREGATE_FUNCTION
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;
$$
--error ER_NOT_AGGREGATE_FUNCTION
CREATE PACKAGE BODY pkg1 AS
PROCEDURE p1 AS
BEGIN
NULL;
END;
FUNCTION f1 RETURN INT AS
BEGIN
RETURN 0;
END;
BEGIN
FETCH GROUP NEXT ROW; -- In a package executable section
END;
$$
DELIMITER ;$$
DROP PACKAGE pkg1;
|
