Comments on: Combining multiple INSERT statements with MySQL http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/ development in a land far far away... Wed, 15 Oct 2008 23:41:15 +0000 http://wordpress.org/?v=abc By: Michael Sharman http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-46484 Michael Sharman Mon, 21 Apr 2008 00:36:26 +0000 http://www.chapter31.com/?p=219#comment-46484 @Zac - I just remembered that the MyISAM storage engine for MySQL (which is what I mainly use) doesn't support transactions, so that wouldn't work unfortunately. @Zac - I just remembered that the MyISAM storage engine for MySQL (which is what I mainly use) doesn’t support transactions, so that wouldn’t work unfortunately.

]]> By: Michael Sharman http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44394 Michael Sharman Fri, 04 Apr 2008 21:59:43 +0000 http://www.chapter31.com/?p=219#comment-44394 @Tony - Sorry I should have mentioned that, it works for both. http://dev.mysql.com/doc/refman/5.0/en/insert.html http://dev.mysql.com/doc/refman/4.1/en/insert.html @Tony - Sorry I should have mentioned that, it works for both.

http://dev.mysql.com/doc/refman/5.0/en/insert.html

http://dev.mysql.com/doc/refman/4.1/en/insert.html

]]> By: Tony Garcia http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44323 Tony Garcia Fri, 04 Apr 2008 12:19:06 +0000 http://www.chapter31.com/?p=219#comment-44323 Do you happen to know if this works with MySQL 4 and 5? Do you happen to know if this works with MySQL 4 and 5?

]]> By: Michael Sharman http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44269 Michael Sharman Fri, 04 Apr 2008 02:26:47 +0000 http://www.chapter31.com/?p=219#comment-44269 @Zac - ah that makes sense! Great tip and thanks for clearing that up for me. Heh, sorry about the textarea size. I need to upgrade my 'theme' soon so I'll be doing it then. @Zac - ah that makes sense! Great tip and thanks for clearing that up for me.

Heh, sorry about the textarea size. I need to upgrade my ‘theme’ soon so I’ll be doing it then.

]]> By: zac spitzer http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44267 zac spitzer Fri, 04 Apr 2008 01:40:18 +0000 http://www.chapter31.com/?p=219#comment-44267 Transactions actually make a huge difference. Each insert statement actually means stop and write out to disk. Thus four inserts means stop and write out to disk four times. MySQL might be a bit different depeneding on the table type, but this is definately true for Oracle. Wrapping inserts up in a transaction means that the db will then only write out to disk once. Whenever you are inserting or updating a lot of data, wrapping the queries up in a transaction will speed things up a lot, just watch your hard disk light with and without a transaction. http://zacster.blogspot.com/2007/10/faster-inserts-and-updates-with.html PS: any chance of a larger comment field? Transactions actually make a huge difference. Each insert statement actually means stop and write out to disk. Thus four inserts means stop and write out to disk four times. MySQL might be a bit different depeneding on the table type, but this is definately true for Oracle.

Wrapping inserts up in a transaction means that the db will then only write out to disk once.

Whenever you are inserting or updating a lot of data, wrapping the queries up in a transaction will speed things up a lot, just watch your hard disk light with and without a transaction.

http://zacster.blogspot.com/2007/10/faster-inserts-and-updates-with.html

PS: any chance of a larger comment field?

]]> By: Michael Sharman http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44235 Michael Sharman Thu, 03 Apr 2008 20:18:43 +0000 http://www.chapter31.com/?p=219#comment-44235 @Henry - Sorry, blog cut off your comment. Can you retry? @Henry - Sorry, blog cut off your comment. Can you retry?

]]> By: Michael Sharman http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44234 Michael Sharman Thu, 03 Apr 2008 20:18:07 +0000 http://www.chapter31.com/?p=219#comment-44234 @David - I assume you mean BULK INSERT? My understanding is that you use that for importing data from files on the hard disk (BULK INSERT for MSSQL and LOAD DATA INFILE for MySQL). @David - I assume you mean BULK INSERT?

My understanding is that you use that for importing data from files on the hard disk (BULK INSERT for MSSQL and LOAD DATA INFILE for MySQL).

]]> By: Michael Sharman http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44232 Michael Sharman Thu, 03 Apr 2008 20:13:33 +0000 http://www.chapter31.com/?p=219#comment-44232 @Zac - I haven't benchmarked this but I may over the weekend. Agreed re: indexes. Not sure how a transaction would help with performance, a transaction is an "all or nothing" type of operation (with the option to rollback to a particular point of course) @Anuj - Yeah I didn't think you could do this with MSSQL! Oh well. @Zac - I haven’t benchmarked this but I may over the weekend. Agreed re: indexes.

Not sure how a transaction would help with performance, a transaction is an “all or nothing” type of operation (with the option to rollback to a particular point of course)

@Anuj - Yeah I didn’t think you could do this with MSSQL! Oh well.

]]> By: Henry http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44222 Henry Thu, 03 Apr 2008 17:54:45 +0000 http://www.chapter31.com/?p=219#comment-44222 What I do is I put the that generate the insert statements INSIDE the , then there will only be only 1 cfquery / connection. What I do is I put the that generate the insert statements INSIDE the , then there will only be only 1 cfquery / connection.

]]> By: David Buhler http://www.chapter31.com/2008/04/03/combining-multiple-insert-statements-with-mysql/#comment-44215 David Buhler Thu, 03 Apr 2008 16:41:03 +0000 http://www.chapter31.com/?p=219#comment-44215 Can you do a bulk update if the foreign IDs are the same? Can you do a bulk update if the foreign IDs are the same?

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