Sorry if this is a dumb question, but are SQL transactions in MySQL atomic?
I'm using InnoDB tables in MySQL5.
Clearly, transactions have the property that either all updates occur or
none do. By atomic, I mean are other queries guaranteed to either see all
changes from the transaction or none
We're trying to figure out how to design a particularly critical table in
our database schema. The choices are to use a single large table or a
series of dynamically created small tables.
This table will receive the majority of traffic (queries and updates) in the
database so it's a key part of
-Original Message-
From: Jerry Schwartz [mailto:[EMAIL PROTECTED]
Sent: Thursday, August 23, 2007 2:02 PM
To: 'Douglas Pearson'; mysql@lists.mysql.com
Subject: RE: Dynamic tables--always a bad idea?
How are you going to do queries that join or merge thousands of tables? or
won't that be necessary
Apologies if this is a dumb question, but is it possible to write a single
query that either updates certain columns in a row, or adds an entirely new
row if there is none already?
I seem to be running into this a lot, and so far I've solved it by:
1) run UPDATE table SET x,y WHERE some row
2) if
Thanks Mogens. I was aware of REPLACE but it was the non-standard ON
DUPLICATE KEY UPDATE that I was looking for.
Thanks,
Doug
-Original Message-
From: Mogens Melander [mailto:[EMAIL PROTECTED]
Sent: Friday, April 13, 2007 2:28 AM
To: Douglas Pearson
Cc: [EMAIL PROTECTED]
Subject: Re
