vb.org Archive - Cross Database Queries

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- - Cross Database Queries (https://vborg.vbsupport.ru/showthread.php?t=133241)

theferf

12-04-2006 11:16 PM

Cross Database Queries

I am in the process of developing a plugin to access data from a DB outside of vBulletin's database, yet still on the same mySQL server. Normally, this can be done in mySQL by formatting the query as follows:

Code:

SELECT table1.foo FROM db1.table1 WHERE table1.foo='bar';

Where db1 is the name of the external database (on the same DB server). When I attmept this in my plugin I end up with:

Code:

Database error in vBulletin 3.6.2:



Invalid SQL:

SELECT table1.foo FROM db1.table1 where table1.foo='bar';



MySQL Error  : Table 'db1.table1' doesn't exist

Error Number : 1146

Of course, I've renamed the DB and table in this example to protect the innocent. ;) The DB and the table do exist, but for some reason the $db->query() usage in VB won't let me do this. I have used the very same method in PHP's native mysql_query() many, many times. Is there something in the VB database class that prevents this?

CyberAlien

12-05-2006 11:33 AM

Maybe database user set in vbulletin config is not allowed to access db1?

theferf

12-05-2006 03:26 PM

Thanks for the reply CyberAlien. I found my issue. For some reason vB threw the error in my example because I didn't also use the identifier for the SELECT. It's now working as:

Code:

SELECT db1.table1.foo FROM db1.table1 WHERE db1.table1.foo='bar';

I'm not sure if that's being overly strict, but it's a good coding habit anyway IMHO.

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