database connection within modifier function

Hello again ;o)

how would one relate to an existing database connection
(PEAR::MDB2) 
within a plugin or modifier function?
The database connection is included as 'standard_db.inc.php'
 in 
'standard.php' which finally displays the template
containing the plugin.

Is there a way of directly relating to the global variable
$mdb2 within 
a modifier-function or would I have
- to fetch 'standard_db.inc.php',
- define $mdb2 as constant (using $smarty.const),
- use config file,
- assign it to smarty or even
- open a new database connection?


in modifier.get_supplier.php:

function smarty_modifier_get_supplier($params)
{
...
$supplier = & $mdb2->queryCol($req);
...
}


Thanks in advance,
Peggy

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