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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
# Setup
create table parent (
pk int primary key,
id1 int unique,
id2 int unique,
ref1 int,
ref2 int,
constraint fk_p1 foreign key ref1_idx(ref1) references parent (id1),
foreign key ref2_idx(ref2) references parent (id2)
) engine ndb;
create table child (
pk int primary key,
ref1 int,
ref2 int,
constraint fk_c1 foreign key ref1_idx(ref1) references parent (id1),
foreign key ref2_idx(ref2) references parent (id2)
) engine ndb;
# Verify the foreign keys on parent and child
SHOW CREATE TABLE test.parent;
Table Create Table
parent CREATE TABLE `parent` (
`pk` int NOT NULL,
`id1` int DEFAULT NULL,
`id2` int DEFAULT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
UNIQUE KEY `id1` (`id1`),
UNIQUE KEY `id2` (`id2`),
KEY `fk_p1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `fk_p1` FOREIGN KEY (`ref1`) REFERENCES `parent` (`id1`),
CONSTRAINT `parent_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent` (`id2`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
SHOW CREATE TABLE test.child;
Table Create Table
child CREATE TABLE `child` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Simple rename parent
rename table parent to parent1;
# Verify the foreign keys on parent and child
SHOW CREATE TABLE test.parent1;
Table Create Table
parent1 CREATE TABLE `parent1` (
`pk` int NOT NULL,
`id1` int DEFAULT NULL,
`id2` int DEFAULT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
UNIQUE KEY `id1` (`id1`),
UNIQUE KEY `id2` (`id2`),
KEY `fk_p1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `fk_p1` FOREIGN KEY (`ref1`) REFERENCES `parent1` (`id1`),
CONSTRAINT `parent1_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent1` (`id2`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
SHOW CREATE TABLE test.child;
Table Create Table
child CREATE TABLE `child` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent1` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent1` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Rename parent using copy algorithm
alter table parent1 rename to parent2, algorithm = copy;
# Verify the foreign keys on parent and child
SHOW CREATE TABLE test.parent2;
Table Create Table
parent2 CREATE TABLE `parent2` (
`pk` int NOT NULL,
`id1` int DEFAULT NULL,
`id2` int DEFAULT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
UNIQUE KEY `id1` (`id1`),
UNIQUE KEY `id2` (`id2`),
KEY `fk_p1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `fk_p1` FOREIGN KEY (`ref1`) REFERENCES `parent2` (`id1`),
CONSTRAINT `parent2_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent2` (`id2`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
SHOW CREATE TABLE test.child;
Table Create Table
child CREATE TABLE `child` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent2` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent2` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Rename parent using inplace algorithm
alter table parent2 rename to parent3, algorithm = inplace;
# Verify the foreign keys on parent and child
SHOW CREATE TABLE test.parent3;
Table Create Table
parent3 CREATE TABLE `parent3` (
`pk` int NOT NULL,
`id1` int DEFAULT NULL,
`id2` int DEFAULT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
UNIQUE KEY `id1` (`id1`),
UNIQUE KEY `id2` (`id2`),
KEY `fk_p1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `fk_p1` FOREIGN KEY (`ref1`) REFERENCES `parent3` (`id1`),
CONSTRAINT `parent3_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent3` (`id2`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
SHOW CREATE TABLE test.child;
Table Create Table
child CREATE TABLE `child` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent3` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent3` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Simple rename child
rename table child to child1;
# Verify the foreign keys on child
SHOW CREATE TABLE test.child1;
Table Create Table
child1 CREATE TABLE `child1` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child1_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent3` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent3` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Rename child using copy algorithm
alter table child1 rename to child2, algorithm = copy;
# Verify the foreign keys on child
SHOW CREATE TABLE test.child2;
Table Create Table
child2 CREATE TABLE `child2` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child2_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent3` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent3` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Rename child using inplace algorithm
alter table child2 rename to child3, algorithm = inplace;
# Verify the foreign keys on child
SHOW CREATE TABLE test.child3;
Table Create Table
child3 CREATE TABLE `child3` (
`pk` int NOT NULL,
`ref1` int DEFAULT NULL,
`ref2` int DEFAULT NULL,
PRIMARY KEY (`pk`),
KEY `fk_c1` (`ref1`),
KEY `ref2_idx` (`ref2`),
CONSTRAINT `child3_fk_1` FOREIGN KEY (`ref2`) REFERENCES `parent3` (`id2`),
CONSTRAINT `fk_c1` FOREIGN KEY (`ref1`) REFERENCES `parent3` (`id1`)
) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
Foreign keys consistent across NDB and all connected mysqld's DDs
# Cleanup
drop table child3, parent3;
|
