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129 lines
4.3 KiB
Text
129 lines
4.3 KiB
Text
create table parent(
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id int unique key
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) engine innodb;
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create table child(
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parent_id int,
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foreign key(parent_id) references parent(id)
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on delete restrict
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on update restrict
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) engine innodb with system versioning;
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insert into parent values(1);
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insert into child values(1);
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delete from parent where id = 1;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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delete from child where parent_id = 1;
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delete from parent where id = 1;
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insert into parent values(1);
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insert into child values(1);
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update parent set id=id+1;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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delete from child;
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update parent set id=id+1;
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select * from child for system_time from timestamp '1-1-1' to timestamp now(6);
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parent_id
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1
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1
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drop table child;
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drop table parent;
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create table parent(
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id int(10) unsigned unique key
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) engine innodb;
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create table child(
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parent_id int(10) unsigned primary key,
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foreign key(parent_id) references parent(id)
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) engine innodb with system versioning;
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insert into parent values(1);
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insert into child values(1);
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delete from parent where id = 1;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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drop table child;
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drop table parent;
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create table parent(
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id int unique key
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) engine innodb;
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create table child(
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parent_id int,
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foreign key(parent_id) references parent(id)
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on delete cascade
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on update cascade
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) engine innodb with system versioning;
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insert into parent values(1);
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insert into child values(1);
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delete from parent where id = 1;
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select * from child;
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parent_id
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select * from child for system_time from timestamp '1-1-1' to timestamp now(6);
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parent_id
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1
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insert into parent values(1);
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insert into child values(1);
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update parent set id=id+1;
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select * from child;
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parent_id
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2
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select * from child for system_time from timestamp '1-1-1' to timestamp now(6);
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parent_id
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1
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2
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drop table child;
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drop table parent;
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create table parent(
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id int unique key
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) engine innodb;
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create table child(
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parent_id int,
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foreign key(parent_id) references parent(id)
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on delete set null
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on update set null
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) engine innodb with system versioning;
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insert into parent values(1);
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insert into child values(1);
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delete from child;
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insert into child values(1);
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delete from parent where id = 1;
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select * from child;
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parent_id
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NULL
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select * from child for system_time from timestamp '1-1-1' to timestamp now(6);
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parent_id
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1
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NULL
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delete from child;
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insert into parent values(1);
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insert into child values(1);
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update parent set id=id+1;
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select * from child;
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parent_id
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NULL
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select * from child for system_time from timestamp '1-1-1' to timestamp now(6);
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parent_id
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1
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NULL
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NULL
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drop table child;
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drop table parent;
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create or replace table parent(
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id int unique key
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) engine innodb with system versioning;
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create or replace table child(
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parent_id int,
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foreign key(parent_id) references parent(id)
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) engine innodb;
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insert into parent values(1);
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insert into child values(1);
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delete from parent;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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update parent set id=2;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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delete from child;
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delete from parent;
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insert into child values(1);
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ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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insert into parent values(1);
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insert into child values(1);
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delete from parent;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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update parent set id=2;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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drop table child;
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drop table parent;
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