Re: Getting database name from link identifier

On Tue, Feb 25, 2014 at 5:15 PM, Larry Martell <larry.martell@gmail.com> wrote: > On Tue, Feb 25, 2014 at 5:09 PM, Aziz Saleh <azizsaleh@gmail.com> wrote: >> On Tue, Feb 25, 2014 at 4:59 PM, Larry Martell <larry.martell@gmail.com> >> wrote: >>> On Tue, Feb 25, 2014 at 4:53 PM, Aziz Saleh <azizsaleh@gmail.com> wrote: >>> > On Tue, Feb 25, 2014 at 4:47 PM, Larry Martell <larry.martell@gmail.com> >>> > wrote: >>> >> On Tue, Feb 25, 2014 at 4:41 PM, Aziz Saleh <azizsaleh@gmail.com> >>> >> wrote: >>> >> > On Tue, Feb 25, 2014 at 4:28 PM, Larry Martell >>> >> > <larry.martell@gmail.com> >>> >> > wrote: >>> >> >> >>> >> >> Is there any way to find out what database I am connected to from a >>> >> >> link identifier? >>> >> >> >>> >> >> I have some code this does this: >>> >> >> >>> >> >> @ $db = mysql_pconnect($dbserver, $dbuser, $dbpass); >>> >> >> @ mysql_select_db($dbname, $db); >>> >> >> >>> >> >> I know at the time this is executed $dbname is what I want it to be. >>> >> >> But later on when I pull data using $db, I get data from a different >>> >> >> database. If I try to echo $db at the time of the query I get >>> >> >> "Resource id #5". Can I get the database name from $db? >>> >> > You won't be able to, you will need to execute a query on that DB >>> >> > connection >>> >> > handler to check the DB name currently used: >>> >> > >>> >> > SELECT DATABASE() as DB_NAME >>> >> >>> >> Thanks! Indeed I am not 'using' the db that $dbname is set to when I >>> >> execute the mysql_select_db command. Now I just have to figure out why >>> >> that is. >>> > >>> > >>> > Are you making a call to mysql_select_db besides the above during your >>> > code >>> > execution (even on a different DB handler)? If yes, then that would be >>> > the >>> > issue since. >>> >>> I was simplifying the code for purposes of asking the question. >>> Actually the app connects to 23 different databases on different >>> servers. The link identifiers are stored in an array. Each >>> mysql_select_db is called with a different link identifiers. I am >>> echoing out the link identifiers and the array index when I create >>> them and also when I use them. I see that the index is the same, the >>> resource id # is the same, but I'm connected to a different db then >>> the one I called mysql_select_db with. >> >> >> Is it safe to assume that that all of those 23 connections have different >> host/user/password combination? > > No, there are multiple connections on each server. > >> I ran into issues before, where changing the database using the >> mysql_select_db function changed the db for the connection for all users who >> are sharing that connection - PHP was running as apache module and not cgi. >> I ended up using mysql_connect with the third param as true to force a new >> connection. > > I'm using mysql_pconnect, which does not have the new_link param. > Sounds like you've hit the problem I'm having. I'll try changing to > mysql_connect with new_link true and see if that fixes it. That indeed was it. I changed to mysql_connect with new_link true and the issue went away. Thanks very much!