Mysql On Duplicate Key Update Changes Auto Generated Id
- Mysql On Duplicate Key Update Changes Auto Generated Id 2017
- On Duplicate Key Update Mysql
- Mysql On Duplicate Key Update Changes Auto Generated Id Online
- On Duplicate Key Update Missing Select
- Phpmyadmin Add On Duplicate Key Update
Date: August 22, 2007 01:45PM
Noted in 5.0.38, 5.1.17 changelogs. ON DUPLICATE KEY UPDATE statements where some AUTOINCREMENT values were generated automatically for inserts and some rows were updated, one auto-generated value was lost per updated row, leading to faster exhaustion of the range of the AUTOINCREMENT column. I need help with this query in mysql, the primary key (id) auto-increments for each primary key, what I wanna do is update the insert if there is. Jump to content. My subreddits. Edit subscriptions. Limit my search to r/mysql. Use the following search parameters to narrow your results: subreddit. Replication: When events generated by one MySQL server instance were written to the binary log of another instance, the second server implicitly assumed that the first server supported the same number of binary log event types as itself. Where this was not the case, the event header was handled incorrectly. You can always add ON DUPLICATE KEY UPDATE Read here (not exactly, but solves your problem it seems). From the comments, by @ravi. Whether the increment occurs or not depends on the innodbautoinclockmode setting. If set to a non-zero value, the auto-inc counter will increment even if the ON DUPLICATE KEY fires. Nov 22, 2013 It means that all code after ON DUPLICATE KEY UPDATE won't be executed. For instance in our example when we don't have such values in database, after this query we will have row with articleid = 12 and viewscount = 1 (not 2). Batch insert with ON DUPLICATE KEY. There is also option to make batch insert to database using ON DUPLICATE KEY UPDATE. Description: When INSERT. ON DUPLICATE KEY UPDATE executes the UPDATE statement instead of the INSERT statement, LASTINSERTID gets incremented as if a row was added to the table, even though no such thing happened.
Prevent auto increment on MySQL duplicate insert. Ask Question. INSERT IGNORE INTO tablename SET tag='whatever', the auto increment id value increases even if the insert was ignored. Interestingly enough, with non-traditional, it still increments for me using INSERT.ON DUPLICATE KEY UPDATE for MySQL 5.5.41 – Rogue Apr 4 '15 at 22:06.
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One of my clients has just mailed me about a bug which has occurred in an application I wrote some time ago.
After some tracking I finally got to the table:
> CREATE TABLE `devel_travel_miasta` (
> `id_town` int(10) unsigned NOT NULL auto_increment,
> `name` varchar(64) collate utf8_polish_ci NOT NULL,
> `confirmed` tinyint(1) unsigned NOT NULL default '0',
> PRIMARY KEY (`id_town`),
> UNIQUE KEY `unique` (`name`)
> ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_polish_ci AUTO_INCREMENT=1065;
and the query
> INSERT INTO '.TAB_TRAVEL_MIASTA.' (name) VALUES ('.$name.') ON DUPLICATE KEY UPDATE name = '.$name.';
which on the 5.0.45-log server after invoking mysql_insert_id(); returns 'next autoindex' value instead of the ID value of the updated row.
The code used to work fine till today on the remote (probably just upgraded) server, and works fine on my local 5.0.27-community-nt server.
Any clue what's going on?
Regards,
Jakub Wiśniewski
Custom Internet Solutions
http://jrobin.net/en
Mysql On Duplicate Key Update Changes Auto Generated Id 2017
On Duplicate Key Update Mysql
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Date: March 31, 2009 02:43PM
'id' is not unique .. a value can be repeated, each with a different 'tag'.
'tag' is not unique, in the same way.
However, I never want have a duplicate entry for a given id,tag pair.
I want to insert a new id1,tag1 pair, but only if it is not a duplicate.
Should the following work?
INSERT table SET id=id1, tag=tag1 ON DUPLICATE KEY UPDATE id=id
I could say 'id' is the PRIMARY key (but it isn't unique),
and I could make an INDEX on 'tag', .. but I don't know how to say
that each 'id,tag' pair is unique .. so MySQL could recognize
when there is a DUPLICATE.
As a separate question, .. I can't figure out how to say 'ON DUPLICATE <DO NOTHING>', so that is why I put 'id=id'.
I could first do a SELECT to see if the id1,tag1 pair is present in the table,
and when it is not, I could do the INSERT, ..
but this won't work when the MySQL database is at the back end of
an active web site, with multiple interleaved queries happening all the time.
Other updates could sneak in between my separate SELECT / INSERT queries.
Any comments or suggestions appreciated,
David Jones
Mysql On Duplicate Key Update Changes Auto Generated Id Online
On Duplicate Key Update Missing Select
Phpmyadmin Add On Duplicate Key Update
Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.