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 = $$dbh->prepare($sql)
or $app->log($FATAL,"Can't prepare SQL statement [ $sql ] :: $DBI:
+:errstr");
$sth->execute();
$sth->finish();
this is the output from a alter database command.
alter database D_IGT_IMP on data023device = 43 log on
log003device = 5
2> go
Extending database by 22016 pages on disk data023device
Extending database by 2560 pages on disk log003device
Warning: Using ALTER DATABASE to extend the log segment
will cause user thresholds on the log segment within 128
pages of the last
chance threshold to be disabled.
}
This is the sub routinne that fails if run after the alter database.
sub get_table_info() {
my ( $dbh, $table ) = @_;
my @columns = ();
my $sql = "exec sp_getcol2 $table";
my $sth = $$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;
}
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