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cffbb17480
Before MySQL 4.0.18, user-specified constraint names were ignored. Starting with MySQL 4.0.18, the specified constraint name was prepended with the schema name and '/'. Now we are transforming into a format where the constraint name is prepended with the dict_table_t::name and the impossible UTF-8 sequence 0xff. Generated constraint names will be ASCII decimal numbers. On upgrade, old FOREIGN KEY constraint names will be displayed without any schema name prefix. They will be updated to the new format on DDL operations. dict_foreign_t::sql_id(): Return the SQL constraint name without any schemaname/tablename\377 or schemaname/ prefix. row_rename_table_for_mysql(), dict_table_rename_in_cache(): Simplify the logic: Just rename constraints to the new format. dict_table_get_foreign_id(): Replaces dict_table_get_highest_foreign_id(). innobase_get_foreign_key_info(): Let my_error() refer to erroneous anonymous constraints as "(null)". row_delete_constraint(): Try to drop all 3 constraint name variants. Reviewed by: Thirunarayanan Balathandayuthapani Tested by: Matthias Leich
61 lines
2.1 KiB
Plaintext
61 lines
2.1 KiB
Plaintext
create table t1 (f1 int primary key) engine=innodb;
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create table t2 (f2 int primary key) engine=innodb;
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create table t3 (f3 int primary key, foreign key (f3) references t2(f2)) engine=innodb;
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insert into t1 values (1),(2),(3),(4),(5);
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insert into t2 values (1),(2),(3),(4),(5);
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insert into t3 values (1),(2),(3),(4),(5);
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connect con1,localhost,root;
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set debug_sync='alter_table_before_rename_result_table signal g1 wait_for g2';
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alter table t2 add constraint foreign key (f2) references t1(f1) on delete cascade on update cascade;
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connection default;
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set debug_sync='before_execute_sql_command wait_for g1';
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update t1 set f1 = f1 + 100000 limit 2;
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connect con2,localhost,root;
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kill query UPDATE;
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disconnect con2;
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connection default;
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ERROR 70100: Query execution was interrupted
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set debug_sync='now signal g2';
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connection con1;
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show create table t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`f2` int(11) NOT NULL,
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PRIMARY KEY (`f2`),
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CONSTRAINT `1` FOREIGN KEY (`f2`) REFERENCES `t1` (`f1`) ON DELETE CASCADE ON UPDATE CASCADE
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci
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disconnect con1;
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connection default;
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select * from t2 where f2 not in (select f1 from t1);
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f2
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select * from t3 where f3 not in (select f2 from t2);
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f3
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drop table t3;
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drop table t2;
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drop table t1;
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set debug_sync='reset';
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#
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# MDEV-16060 - InnoDB: Failing assertion: ut_strcmp(index->name, key->name)
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#
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CREATE TABLE t1 (`pk` INT PRIMARY KEY) ENGINE=InnoDB;
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CREATE TABLE t2 LIKE t1;
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FLUSH TABLES;
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SET debug_sync='alter_table_intermediate_table_created SIGNAL ready WAIT_FOR go';
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ALTER TABLE t1 ADD FOREIGN KEY(pk) REFERENCES t2(pk) ON UPDATE CASCADE;
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connect con1, localhost, root;
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SET debug_sync='now WAIT_FOR ready';
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SET lock_wait_timeout=0;
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UPDATE t2 SET pk=10 WHERE pk=1;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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PREPARE stmt FROM 'UPDATE t2 SET pk=10 WHERE pk=1';
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DEALLOCATE PREPARE stmt;
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SET debug_sync='now SIGNAL go';
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connection default;
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disconnect con1;
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connection default;
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SET debug_sync='reset';
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SHOW OPEN TABLES FROM test;
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Database Table In_use Name_locked
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test t2 0 0
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DROP TABLE t1, t2;
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