Error 1701 Mysql
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Truncate Table With Foreign Key Constraint Sql Server
have ON DELETE CASCADE SET I get: ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint (mytest.instance, CONSTRAINT instance_ibfk_1 FOREIGN KEY (GroupID) REFERENCES mytest.mygroup (ID)) drop database mytest; create database mytest; use mytest; CREATE TABLE mygroup ( ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY ) ENGINE=InnoDB; CREATE TABLE instance ( ID INT NOT NULL AUTO_INCREMENT PRIMARY KEY, GroupID INT NOT NULL, DateTime DATETIME DEFAULT NULL, FOREIGN KEY (GroupID) REFERENCES mygroup(ID) cannot truncate a table referenced in a foreign key constraint laravel ON DELETE CASCADE, UNIQUE(GroupID) ) ENGINE=InnoDB; mysql foreign-keys constraints truncate dml share|improve this question edited Dec 29 '15 at 5:35 Insane Skull 3,18261737 asked Mar 27 '11 at 21:57 user391986 5,8782471137 2 I agree with @kitsched. –Gustavo Straube Oct 5 '12 at 18:35 10 please change the best answer –opengrid Oct 22 '12 at 9:14 10 Just another reminder to change the "best answer" to user447951's answer... –Xethron May 24 '13 at 10:26 As above, please mark user447951's answer as correct. Just saved me a whole load of time with something that went very wrong –Andy Holmes May 15 at 7:10 add a comment| 5 Answers 5 active oldest votes up vote 362 down vote accepted You cannot TRUNCATE a table that has FK constraints applied on it (TRUNCATE is not the same as DELETE). To work around: Option 1: which does not risk damage to data integrity: Remove constraints Perform TRUNCATE Delete manually the rows that now have references to nowhere Create constraints Option 2: suggested by user447951 in his answer, which is bad practice. Use it if you are OK risking damage to data integrity. SET FOREIGN_KEY_CHECKS = 0; TRUNCATE table1; SET FOREIGN_KEY_CHECKS = 1; share|improve this answer edited Dec 29 '15 at 5:36 Insane Skull 3,18261737 answered Mar 27 '11 at 22:03 zerkm
ERROR 1701 (42000): Cannot truncate
Cannot Truncate A Table Referenced In A Foreign Key Constraint Django
a table referenced in a foreign key constraint Explanation Due to that a table http://stackoverflow.com/questions/5452760/truncate-foreign-key-constrained-table is referenced in a foreign key constraint it isn’t possible to truncate the table. Solution It’s possible to disable the foreign key constraint check by adding SET FOREIGN_KEY_CHECKS=0; SET FOREIGN_KEY_CHECKS=0; https://tombevers.me/2013/10/14/how-to-truncate-a-foreign-key-constrained-table/ TRUNCATE table1; TRUNCATE table2; SET FOREIGN_KEY_CHECKS=1; The example works as follow: Disable the foreign key constraint check Truncate table1 Truncate table2 Enable foreign key constraint check again It’s not neccesarry to use SET FOREIGN_KEY_CHECKS=1; to enable the foreign key constraint check again as the setting is only valid during the connection. As soon as you disconnect, the next session will have it set back to 1. Comments Please enable JavaScript to view the comments powered by Disqus. comments powered by Disqus © 2014 Tom Bevers. Powered by Jekyll.
2010 21:38 Reporter: Masahiro Tomita Email Updates: Status: Duplicate Impact on me: None Category:MySQL Server: Documentation Severity:S2 (Serious) Version:5.5.7, 5.5.9 OS:Any Assigned to: Assigned Account Tags: regression Triage: Needs Triage: D2 (Serious) https://bugs.mysql.com/bug.php?id=58788 View Add Comment Files Developer Edit Submission View Progress Log Contributions [7 Dec 2010 16:39] Masahiro Tomita Description: On mysqld 5.5.7 'truncate' command cause error 'Cannot truncate a table referenced in a foreign key http://forums.devshed.com/mysql-help-4/error-1701-sqlstate-42000-er_truncate_illegal_fk-945354.html constraint'. On mysqld 5.5.6 it work fine. How to repeat: mysql> use test; Database changed mysql> create table t1 (id int, c char(10), primary key (id)) engine innodb; Query OK, 0 rows affected (0.10 foreign key sec) mysql> create table t2 (id int, t1 int, foreign key (t1) references t1(id) on delete cascade) engine innodb; Query OK, 0 rows affected (0.24 sec) mysql> truncate t1; ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1`) REFERENCES `test`.`t1` (`id`)) [7 Dec 2010 16:47] Peter Laursen but DELETE FROM t1; .. works fine. [7 Dec 2010 16:57] foreign key constraint Valerii Kravchuk Indeed, we have this error message: macbook-pro:5.5-sec openxs$ bin/mysql -uroot test Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.5.9-debug Source distribution Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> create table t1 (id int, c char(10), primary key (id)) engine innodb;Query OK, 0 rows affected (0.09 sec) mysql> create table t2 (id int, t1 int, foreign key (t1) references t1(id) on delete cascade) engine innodb; Query OK, 0 rows affected (0.07 sec) mysql> truncate t1;ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`t1`) REFERENCES `test`.`t1` (`id`)) and this is not documented or explained at all in http://dev.mysql.com/doc/refman/5.5/en/truncate-table.html (we should expect deleting row by row, but not this). Thus this is a regression bug. [7 Dec 2010 17:17] Davi
Search Username Password Remember Me? Register Lost Password? facebook google twitter rss Free Web Developer Tools Advanced Search Forum Databases MySQL Help Error 1701 sqlstate 42000 er_truncate_illegal_fk Thread: Error 1701 sqlstate 42000 er_truncate_illegal_fk Share This Thread Tweet This + 1 this Post To Linkedin Subscribe to this Thread Subscribe to This Thread May 17th, 2013,02:56 PM #1 ByGoneYrs View Profile View Forum Posts Contributing User Devshed Newbie (0 - 499 posts) Join Date Aug 2012 Location Southern New Jersey, USA Posts 205 Rep Power 105 Error 1701 sqlstate 42000 er_truncate_illegal_fk Hello everyone, Currently we are taking data from a 5.0.51a MySQL open source DB and trying to load that data into MySQL 5.6.10 open source DB getting the following when trying to Truncate a table with a Foriegn key constraints.... What is the best way to do this... 2013-05-17 15:05:13: INFORMATION - Calculating QTXN database size... 2013-05-17 15:05:18: INFORMATION - QTXN database size: 7915 positions, 94811 total transactions. 2013-05-17 15:05:18: ERROR - query 'TRUNCATE TABLE Position;' failed with error code 1701 2013-05-17 15:05:18: INFORMATION - Finished QTXN load 2013-05-17 15:05:18: ERROR - Process Failed, Error Code = 1701 The task abended at this point and the load failed. Error: 1701 SQLSTATE: 42000 (ER_TRUNCATE_ILLEGAL_FK) Message: Cannot truncate a table referenced in a foreign key constraint (%s) Now we chose to use Truncate because it was faster that using the drop table and recreate. What is the best way to overcome this? Thanks in advance... Faq Reply With Quote May 17th, 2013,03:09 PM #2 ByGoneYrs View Profile View Forum Posts Contributing User Devshed Newbie (0 - 499 posts) Join Date Aug 2012 Location Southern New Jersey, USA Posts 205 Rep Power 105 Also this same code for loading the data worked perfectly in 5.0.51a, but it fails in 5.6.10 so if I created any table with two rows as the parent table and the child table had two rows with one being a foreign key tied to the parent table and tried to truncate the parent table...how do I do this in 5.6.10? Faq Reply With Quote May 17th, 2013,03:38 PM #3 ByGoneYrs View Profile View Forum Posts Contributing User Devshed Newbie (0 - 499 posts)