Re: Error dropping databases [in InnoDb]
Michael, Marko has fixed this to 4.0.19. Best regards, Heikki Tuuri Innobase Oy Foreign keys, transactions, and row level locking for MySQL InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up MyISAM tables http://www.innodb.com/order.php Order MySQL technical support from https://order.mysql.com/ - Original Message - From: Michael McTernan [EMAIL PROTECTED] To: Tom O'Neil [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, April 29, 2004 12:40 PM Subject: RE: Error dropping databases [in InnoDb] Hi, I have found this too. I think it is as a result of a change introduced in 4.0.18. From http://www.innodb.com/ibman.php#InnoDB.history : MySQL/InnoDB-4.0.18, February 13, 2004 - Do not allow dropping a table referenced by a FOREIGN KEY constraint, unless the user does SET FOREIGN_KEY_CHECKS=0. The error message here is somewhat misleading 'Cannot delete or update a parent row...', and must be changed in a future version 4.1.x. It's a good change, but I'm guessing that InnoDb is handling a drop database first as if all tables are being dropped in some arbirtary order and hence not respecting foreign keys. One solution is to disable foreign key checks before the drop, and then re-enable them afterwards, or alternatively explicitly drop all tables in the correct order before dropping the database. I wonder if there are any plans to fix this in future versions on InnoDb? Thanks, Mike -Original Message- From: Tom O'Neil [mailto:[EMAIL PROTECTED] Sent: 25 March 2004 22:07 To: [EMAIL PROTECTED] Subject: Error dropping databases I am trying to drop several InnoDB and am unable to do so. I login to the command line client and enter drop database [db_name]; and then get this error: ERROR 1217: Cannot delete or update a parent row: a foreign key constraint fails Why am I unable to drop these databases? Tom = -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Error dropping databases [in InnoDb]
Many Thanks :) Mike -Original Message- From: Heikki Tuuri [mailto:[EMAIL PROTECTED] Sent: 30 April 2004 11:56 To: Michael McTernan; Tom O'Neil Cc: [EMAIL PROTECTED] Subject: Re: Error dropping databases [in InnoDb] Michael, Marko has fixed this to 4.0.19. Best regards, Heikki Tuuri Innobase Oy Foreign keys, transactions, and row level locking for MySQL InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up MyISAM tables http://www.innodb.com/order.php Order MySQL technical support from https://order.mysql.com/ - Original Message - From: Michael McTernan [EMAIL PROTECTED] To: Tom O'Neil [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Thursday, April 29, 2004 12:40 PM Subject: RE: Error dropping databases [in InnoDb] Hi, I have found this too. I think it is as a result of a change introduced in 4.0.18. From http://www.innodb.com/ibman.php#InnoDB.history : MySQL/InnoDB-4.0.18, February 13, 2004 - Do not allow dropping a table referenced by a FOREIGN KEY constraint, unless the user does SET FOREIGN_KEY_CHECKS=0. The error message here is somewhat misleading 'Cannot delete or update a parent row...', and must be changed in a future version 4.1.x. It's a good change, but I'm guessing that InnoDb is handling a drop database first as if all tables are being dropped in some arbirtary order and hence not respecting foreign keys. One solution is to disable foreign key checks before the drop, and then re-enable them afterwards, or alternatively explicitly drop all tables in the correct order before dropping the database. I wonder if there are any plans to fix this in future versions on InnoDb? Thanks, Mike -Original Message- From: Tom O'Neil [mailto:[EMAIL PROTECTED] Sent: 25 March 2004 22:07 To: [EMAIL PROTECTED] Subject: Error dropping databases I am trying to drop several InnoDB and am unable to do so. I login to the command line client and enter drop database [db_name]; and then get this error: ERROR 1217: Cannot delete or update a parent row: a foreign key constraint fails Why am I unable to drop these databases? Tom = -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Error dropping databases [in InnoDb]
Hi, I have found this too. I think it is as a result of a change introduced in 4.0.18. From http://www.innodb.com/ibman.php#InnoDB.history : MySQL/InnoDB-4.0.18, February 13, 2004 - Do not allow dropping a table referenced by a FOREIGN KEY constraint, unless the user does SET FOREIGN_KEY_CHECKS=0. The error message here is somewhat misleading 'Cannot delete or update a parent row...', and must be changed in a future version 4.1.x. It's a good change, but I'm guessing that InnoDb is handling a drop database first as if all tables are being dropped in some arbirtary order and hence not respecting foreign keys. One solution is to disable foreign key checks before the drop, and then re-enable them afterwards, or alternatively explicitly drop all tables in the correct order before dropping the database. I wonder if there are any plans to fix this in future versions on InnoDb? Thanks, Mike -Original Message- From: Tom O'Neil [mailto:[EMAIL PROTECTED] Sent: 25 March 2004 22:07 To: [EMAIL PROTECTED] Subject: Error dropping databases I am trying to drop several InnoDB and am unable to do so. I login to the command line client and enter drop database [db_name]; and then get this error: ERROR 1217: Cannot delete or update a parent row: a foreign key constraint fails Why am I unable to drop these databases? Tom = -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
