This is the sub routine that alters the sybase database. the alter command can run for a extended period of time. 
sub _grow_db() {

my ( $dbh, $dbname, $increase, $tran_size, $data_pool, $log_pool ) = @
+_;

my $log_increase = int ( $increase * $params->get("Device.Log.Percent"
+) / 100 );
my $max_tran_size = int ( $params->get("Max.Tran.Size") );

my $sql = "use master";

$$dbh->do($sql)
  or $app->log($FATAL, "Can't do SQL statement [ $sql ] :: $DBI::errst
+r");

$app->log($INFO,"Altering database $dbname.  Increasing data segment b
+y $increase MB");

my $sql="alter database $dbname on ";

foreach my $device ( @$data_pool ) {
    next if ( $$device{free} == 0 );
    if ( $increase >= $$device{free} ) {
        $sql .= "$$device{name}=$$device{free},";
        $increase -= $$device{free};
        $$device{free} = 0;
    } else {
        $sql .= "$$device{name}=$increase,";
        $$device{free} -= $increase;
        $increase = 0;
    }
    last if ( $increase == 0 );
}

if ( $tran_size < $max_tran_size ) {

$app->log($INFO,"Altering database $dbname. Increasing log segment by 
+$log_increase MB");
$sql =~ s/,$//;

$sql .= " log on ";

foreach my $device ( @$log_pool ) {
    next if ( $$device{free} == 0 );
    if ( $log_increase >= $$device{free} ) {
        $sql .= "$$device{name}=$$device{free},";
        $log_increase -= $$device{free};
        $$device{free} = 0;
    } else {
        $sql .= "$$device{name}=$log_increase,";
        $$device{free} -= $log_increase;
        $log_increase = 0;
    }
    last if ( $log_increase == 0 );
}
}

$sql =~ s/,$//;

#$$dbh->do($sql)
#    or $app->log($FATAL,"Can't do SQL statement [ $sql ] :: $DBI::err
+str");

my $sth = $$dbh->prepare($sql)
    or $app->log($FATAL,"Can't prepare SQL statement [ $sql ] :: $DBI:
+:errstr");

$sth->execute();

$sth->finish();

[download]
this is the output from a alter database command.
alter database D_IGT_IMP on data023device = 43 log on
log003device = 5
2> go
Extending database by 22016 pages on disk data023device
Extending database by 2560 pages on disk log003device
Warning: Using ALTER DATABASE to extend the log segment
will cause user thresholds on the log segment within 128
pages of the last
chance threshold to be disabled.
} This is the sub routinne that fails if run after the alter database. 

sub get_table_info() {

my ( $dbh, $table ) = @_;

my @columns = ();

my $sql = "exec sp_getcol2 $table";

my $sth = $$dbh->prepare( $sql )
    or $app->log($FATAL,"Can't prepare SQL statement [ $sql ] :: $DBI:
+:errstr");

$sth->execute()
    or $app->log($FATAL,"Can't prepare SQL statement [ $sql ] :: $DBI:
+:errstr");

while ( my (@results) = $sth->fetchrow_array() ) {
    my $col_ref = {
            'name' => $results[0],
            'type' => $results[1],
            'length' => $results[2],
            'prec' => $results[3],
            'scale' => $results[4],
            'null' => $results[5],
            'identity' => $results[8]
    };
    push @columns, $col_ref;
}
$sth->finish();

return \@columns;

}

[download]

In reply to Re^2: How to determine when sybase process complete by mnlight
in thread How to determine when sybase process complete by mnlight

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