Actually get_db_name() is a subroutine .Sorry I didn't include the subroutine. Here is the connect string;

### Our DBI parameters are:
$dsn="dbi:Sybase:server=$DB_SERVER";
### Connect DB
$dbh = DBI->connect ($dsn, $DB_USER, $DB_PWD) ;
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here is the complete code :

sub process_database {

for ($i=0;$i<$#databases+1;$i++) {
    $database = $databases[$i] ;

    ### Use DB
    $dbh->do("USE $database") || log_message ("SERI","Database error $
+dbh->errstr") ;
get_db_name(); ## output here is okay 

    ### Get details from sysobjects
    $sql = "";
    $sql = "SELECT 1 " ;
    $sth = $dbh->prepare($sql);
    $sth->execute();
get_db_name(); ## output here is master
    $objcount =0;
    while (@row = $sth->fetchrow_array) { ## might give an error as th
+ere wasn't any execute statement before this 
        ($object = $row[0]) =~ s/\s//g ;
        $sql = "";
        $sql = "GRANT ALL ON $object TO PUBLIC" ;
#       $dbh->do($sql) || log_message ("SERI","Database error $dbh->er
+rstr");
        $objcount ++;
    } ## end of while

get_db_name(); ## output here is okay
    log_message("INFO","$objcount objects affected in $database");
} ## end of for
} ## end of subroutine

############################ GET DB NAME() ###########################
+#########
sub get_db_name {
    $sql_dbname = "select db_name()  ";
    $sth = $dbh->prepare($sql_dbname);
    $sth->execute() || die "ERROR : Database error $sth->errstr\n" ;
    while (@row = $sth->fetchrow_array) {
         $_ = $row[0];
         s/\s//g;
         print "IN DATABASE $_ \n";
    } ## end of while
}
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