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              | 0 | -  | 1 | $DBversion = 'XXX'; # will be replaced by the RM | 
            
              |  |  | 2 | if( CheckVersion( $DBversion ) ) { | 
            
              | 3 |     # you can use $dbh here like: | 
            
              | 4 |     $dbh->do( q{ | 
            
              | 5 |         INSERT IGNORE INTO systempreferences ( `variable`, `value`, `options`, `explanation`, `type` ) VALUES | 
            
              | 6 |         ('ArticleRequestsDisclaimerText', '', NULL,'Enter text to enable the disclaimer stage of article request creation. Text will be displayed','Textarea') | 
            
              | 7 |     } ); | 
            
              | 8 |  | 
            
              | 9 |     # or perform some test and warn | 
            
              | 10 |     # if( !column_exists( 'biblio', 'biblionumber' ) ) { | 
            
              | 11 |     #    warn "There is something wrong"; | 
            
              | 12 |     # } | 
            
              | 13 |  | 
            
              | 14 |     # Always end with this (adjust the bug info) | 
            
              | 15 |     NewVersion( $DBversion, 27948, "Add ArticleRequestsDisclaimerText system preference"); | 
            
              | 16 | } |