Hi!
Might something like this help?
INSERT INTO table (a,b,c) VALUES (1,2,3)
ON DUPLICATE KEY UPDATE c=c+1;
So this will catch errors and instead do the update.
Available from version 4.1.0 on as the docs say.
See also the docs:
http://dev.mysql.com/doc/mysql/en/insert.html
-- christian
PS: I might have misunderstood something ;-)
Thomas Olsen wrote:
Hi
This is probably an FAQ but I haven't been able to find and answer.
I need a counter for a certain CMFType and want to store the hits in a MySQL
database not to fill up the ZODB. I've checked to two suggestions below but
they both use two ZSQLMethods first to check if the URL is already in the
table, then to do the actual update or insert.
http://www.zope.org/Members/element/Simple_SQL_Page_Counter
http://zopelabs.com/cookbook/991116439
I'd like to be able to do that just in one ZSQLMethod for efficiency but I
cant seem to figure out a way of doing it.
The table is very simple:
CREATE TABLE mostread (
path varchar(255) NOT NULL default '',
num bigint(20) NOT NULL default '0',
dt datetime NOT NULL default '-00-00 00:00:00',
PRIMARY KEY (path)
)
For now my ZSQLMethod get the argument path which is a relative URL and it
looks like this:
select @lastval:=num from mostread where dtml-sqltest path type=string
dtml-var sql_delimiter
update mostread set [EMAIL PROTECTED], dt=now() where dtml-sqltest path
type=string;
/dtml-if
But that naturally only works if there is already a record containing path.
What I want to do is something like this (pseudo-code):
select @lastval:=num from mostread where dtml-sqltest path type=string
dtml-var sql_delimiter
dtml-if sequence-length 0
update mostread set [EMAIL PROTECTED], dt=now() where dtml-sqltest path
type=string;
dtml-else
insert into mostread(path, num, dt)
values(dtml-sqlvar path type=string, 1, now())
/dtml-if
Is there a way of doing this or should I just create that extra ZSQLMethod?
___
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
