233 lines
8.5 KiB
Plaintext
233 lines
8.5 KiB
Plaintext
# engine=innodb
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create table product (
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category int not null,
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id int not null,
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price decimal,
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primary key(category, id))
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engine=innodb;
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create table customer (
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id int not null,
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primary key (id))
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engine=innodb;
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create table product_order (
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no int not null auto_increment,
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product_category int not null,
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product_id int not null,
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customer_id int not null,
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primary key(no),
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index (product_category, product_id),
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foreign key fk1 (product_category, product_id) references product(category, id)
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on update restrict on delete cascade,
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index (customer_id),
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foreign key fk2 (customer_id) references customer(id))
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engine=innodb;
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create table emp (
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id int primary key auto_increment,
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manager int,
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key (manager),
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foreign key fk1 (manager) references emp (id))
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engine=innodb;
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select *
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from information_schema.table_constraints
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where table_schema = 'test'
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order by table_name, constraint_type, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
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def test PRIMARY test customer PRIMARY KEY
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def test emp_ibfk_1 test emp FOREIGN KEY
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def test PRIMARY test emp PRIMARY KEY
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def test PRIMARY test product PRIMARY KEY
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def test product_order_ibfk_1 test product_order FOREIGN KEY
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def test product_order_ibfk_2 test product_order FOREIGN KEY
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def test PRIMARY test product_order PRIMARY KEY
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COL ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_COL
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customer.id 1 NULL
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emp.id 1 NULL
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emp.manager 1 1 emp.id
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product.category 1 NULL
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product.id 2 NULL
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product_order.customer_id 1 1 customer.id
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product_order.no 1 NULL
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product_order.product_category 1 1 product.category
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product_order.product_id 2 2 product.id
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drop table product_order, customer, product, emp;
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create database mydb1;
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create database mydb2;
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create table mydb1.t1 (
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a1 int not null,
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b1 int not null,
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primary key using hash (a1),
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unique key xb1 (b1)
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) engine=innodb;
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create table mydb2.t2 (
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a2 int not null,
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b2 int not null,
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primary key using hash (a2),
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unique key xb2 (b2)
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) engine=innodb;
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alter table mydb1.t1
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add constraint fk_b1a1 foreign key (b1) references mydb1.t1 (a1),
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add constraint fk_b1b2 foreign key (b1) references mydb2.t2 (b2);
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alter table mydb2.t2
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add constraint fk_b2a2 foreign key (b2) references mydb2.t2 (a2),
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add constraint fk_b2b1 foreign key (b2) references mydb1.t1 (b1);
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select *
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from information_schema.referential_constraints
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order by constraint_schema, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG UNIQUE_CONSTRAINT_SCHEMA UNIQUE_CONSTRAINT_NAME MATCH_OPTION UPDATE_RULE DELETE_RULE TABLE_NAME REFERENCED_TABLE_NAME
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def mydb1 fk_b1a1 def mydb1 PRIMARY NONE RESTRICT RESTRICT t1 t1
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def mydb1 fk_b1b2 def mydb2 xb2 NONE RESTRICT RESTRICT t1 t2
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def mydb2 fk_b2a2 def mydb2 PRIMARY NONE RESTRICT RESTRICT t2 t2
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def mydb2 fk_b2b1 def mydb1 xb1 NONE RESTRICT RESTRICT t2 t1
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select *
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from information_schema.table_constraints
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where table_schema like 'mydb%'
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order by table_name, constraint_type, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
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def mydb1 fk_b1a1 mydb1 t1 FOREIGN KEY
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def mydb1 fk_b1b2 mydb1 t1 FOREIGN KEY
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def mydb1 PRIMARY mydb1 t1 PRIMARY KEY
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def mydb1 xb1 mydb1 t1 UNIQUE
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def mydb2 fk_b2a2 mydb2 t2 FOREIGN KEY
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def mydb2 fk_b2b1 mydb2 t2 FOREIGN KEY
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def mydb2 PRIMARY mydb2 t2 PRIMARY KEY
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def mydb2 xb2 mydb2 t2 UNIQUE
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select *
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from information_schema.key_column_usage
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where table_schema like 'mydb%'
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order by constraint_schema, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
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def mydb1 fk_b1a1 def mydb1 t1 b1 1 1 mydb1 t1 a1
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def mydb1 fk_b1b2 def mydb1 t1 b1 1 1 mydb2 t2 b2
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def mydb1 PRIMARY def mydb1 t1 a1 1 NULL NULL NULL NULL
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def mydb1 xb1 def mydb1 t1 b1 1 NULL NULL NULL NULL
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def mydb2 fk_b2a2 def mydb2 t2 b2 1 1 mydb2 t2 a2
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def mydb2 fk_b2b1 def mydb2 t2 b2 1 1 mydb1 t1 b1
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def mydb2 PRIMARY def mydb2 t2 a2 1 NULL NULL NULL NULL
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def mydb2 xb2 def mydb2 t2 b2 1 NULL NULL NULL NULL
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alter table mydb1.t1
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drop foreign key fk_b1a1,
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drop foreign key fk_b1b2;
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alter table mydb2.t2
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drop foreign key fk_b2a2,
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drop foreign key fk_b2b1;
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drop table mydb1.t1;
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drop table mydb2.t2;
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drop database mydb1;
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drop database mydb2;
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# engine=ndb
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create table product (
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category int not null,
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id int not null,
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price decimal,
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primary key(category, id))
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engine=ndb;
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create table customer (
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id int not null,
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primary key (id))
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engine=ndb;
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create table product_order (
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no int not null auto_increment,
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product_category int not null,
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product_id int not null,
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customer_id int not null,
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primary key(no),
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index (product_category, product_id),
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foreign key fk1 (product_category, product_id) references product(category, id)
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on update restrict on delete cascade,
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index (customer_id),
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foreign key fk2 (customer_id) references customer(id))
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engine=ndb;
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create table emp (
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id int primary key auto_increment,
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manager int,
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key (manager),
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foreign key fk1 (manager) references emp (id))
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engine=ndb;
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select *
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from information_schema.table_constraints
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where table_schema = 'test'
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order by table_name, constraint_type, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
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def test PRIMARY test customer PRIMARY KEY
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def test fk1 test emp FOREIGN KEY
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def test PRIMARY test emp PRIMARY KEY
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def test PRIMARY test product PRIMARY KEY
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def test fk1 test product_order FOREIGN KEY
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def test fk2 test product_order FOREIGN KEY
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def test PRIMARY test product_order PRIMARY KEY
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COL ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_COL
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customer.id 1 NULL
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emp.id 1 NULL
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emp.manager 1 1 emp.id
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product.category 1 NULL
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product.id 2 NULL
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product_order.customer_id 1 1 customer.id
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product_order.no 1 NULL
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product_order.product_category 1 1 product.category
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product_order.product_id 2 2 product.id
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drop table product_order, customer, product, emp;
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create database mydb1;
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create database mydb2;
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create table mydb1.t1 (
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a1 int not null,
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b1 int not null,
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primary key using hash (a1),
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unique key xb1 (b1)
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) engine=ndb;
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create table mydb2.t2 (
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a2 int not null,
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b2 int not null,
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primary key using hash (a2),
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unique key xb2 (b2)
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) engine=ndb;
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alter table mydb1.t1
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add constraint fk_b1a1 foreign key (b1) references mydb1.t1 (a1),
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add constraint fk_b1b2 foreign key (b1) references mydb2.t2 (b2);
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alter table mydb2.t2
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add constraint fk_b2a2 foreign key (b2) references mydb2.t2 (a2),
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add constraint fk_b2b1 foreign key (b2) references mydb1.t1 (b1);
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select *
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from information_schema.referential_constraints
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order by constraint_schema, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME UNIQUE_CONSTRAINT_CATALOG UNIQUE_CONSTRAINT_SCHEMA UNIQUE_CONSTRAINT_NAME MATCH_OPTION UPDATE_RULE DELETE_RULE TABLE_NAME REFERENCED_TABLE_NAME
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def mydb1 fk_b1a1 def mydb1 PRIMARY NONE NO ACTION NO ACTION t1 t1
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def mydb1 fk_b1b2 def mydb2 xb2$unique NONE NO ACTION NO ACTION t1 t2
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def mydb2 fk_b2a2 def mydb2 PRIMARY NONE NO ACTION NO ACTION t2 t2
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def mydb2 fk_b2b1 def mydb1 xb1$unique NONE NO ACTION NO ACTION t2 t1
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select *
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from information_schema.table_constraints
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where table_schema like 'mydb%'
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order by table_name, constraint_type, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
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def mydb1 fk_b1a1 mydb1 t1 FOREIGN KEY
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def mydb1 fk_b1b2 mydb1 t1 FOREIGN KEY
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def mydb1 PRIMARY mydb1 t1 PRIMARY KEY
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def mydb1 xb1 mydb1 t1 UNIQUE
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def mydb2 fk_b2a2 mydb2 t2 FOREIGN KEY
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def mydb2 fk_b2b1 mydb2 t2 FOREIGN KEY
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def mydb2 PRIMARY mydb2 t2 PRIMARY KEY
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def mydb2 xb2 mydb2 t2 UNIQUE
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select *
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from information_schema.key_column_usage
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where table_schema like 'mydb%'
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order by constraint_schema, constraint_name;
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
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def mydb1 fk_b1a1 def mydb1 t1 b1 1 1 mydb1 t1 a1
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def mydb1 fk_b1b2 def mydb1 t1 b1 1 1 mydb2 t2 b2
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def mydb1 PRIMARY def mydb1 t1 a1 1 NULL NULL NULL NULL
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def mydb1 xb1 def mydb1 t1 b1 1 NULL NULL NULL NULL
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def mydb2 fk_b2a2 def mydb2 t2 b2 1 1 mydb2 t2 a2
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def mydb2 fk_b2b1 def mydb2 t2 b2 1 1 mydb1 t1 b1
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def mydb2 PRIMARY def mydb2 t2 a2 1 NULL NULL NULL NULL
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def mydb2 xb2 def mydb2 t2 b2 1 NULL NULL NULL NULL
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alter table mydb1.t1
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drop foreign key fk_b1a1,
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drop foreign key fk_b1b2;
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alter table mydb2.t2
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drop foreign key fk_b2a2,
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drop foreign key fk_b2b1;
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drop table mydb1.t1;
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drop table mydb2.t2;
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drop database mydb1;
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drop database mydb2;
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