Re^2: Perl or SQL ?

As you know my original thought was to go down the create view/bcp data out route as you have suggested also. The problem is that I need to run a regex over the extracted data and I figure it's easier to do this via perl than inside sql given the complexities of what I need to do.
Here is the test code I ended up with (some of which you may recognise ). This is taking the pure select route rather than the create view/bcp route. However I have a problem I getting the regex to work.

This is a snapshot of the dataset

92 1 24 Dec 20 2005  2:14PM 1 14 2   sa tempdb   select * from sysuser
+s
92 1 24 Dec 20 2005  2:14PM 1 14 2   sa tempdb   select * from master.
+.sysprocesses
92 1 24 Dec 20 2005  2:14PM 1 14 2   sa tempdb   select * from sysuser
+s
92 1 24 Dec 20 2005  2:14PM 1 14 2   sa tempdb   select * from master.
+.sysprocesses
92 1 25 Dec 20 2005  2:14PM 1 14 2   sa tempdb   use tempdb
92 1 25 Dec 20 2005  2:14PM 1 14 2   sa tempdb   select * from sysuser
+s
92 1 26 Dec 20 2005  2:14PM 1 14 2   sa tempdb   use tempdb
92 1 26 Dec 20 2005  2:14PM 1 14 2   sa tempdb   select @@version
92 1 26 Dec 20 2005  2:14PM 1 14 2   sa tempdb   
COMMIT TRAN

92 1 26 Dec 20 2005  2:14PM 1 14 2   sa tempdb   create table #ttt (fo
+o varchar(20), bar int)
92 1 26 Dec 20 2005  2:14PM 1 14 2   sa tempdb   insert #ttt values('a
+ string', 1)
92 1 26 Dec 20 2005  2:14PM 1 14 2  0001fb520002 sa tempdb   insert #t
+tt values('another string', 2)
92 1 26 Dec 20 2005  2:14PM 1 14 2  0001fb520002 sa tempdb   insert #t
+tt values('foodiboo', 3)
92 1 26 Dec 20 2005  2:14PM 1 14 2  0001fb520002 sa tempdb   
ROLLBACK TRAN

Here's the code

my $lastrunt = "Dec 20 2005  9:00AM";
my @sqlcmd;
$dbh->do("use sybsecurity");
$sth=$dbh->prepare("select * from sysobjects where name like 'sysaudit
+s_%'");
$sth->execute;
while ($data = $sth->fetch) {
      push @sqlcmd,"select extrainfo from @$data where suid in (select
+ a.suid from master..syslogins a, master..s
ysloginroles b where b.srid=0 and a.suid=b.suid and a.suid not in (1,8
+))) and event=92 and eventtime > '$lastrunt'";
      push @sqlcmd," union";
   }
pop @sqlcmd;

$sth=$dbh->prepare("@sqlcmd");
$sth->execute;
while ($data = $sth->fetch) {
   # print "@$data\n";
  if($data =~ /create/) { print "@$data\n"; }
}
[download]

I was trying to only pick out the create statements but I don't get anything. If I uncomment the print then the above dataset is returned.

I'm trying to get to grips with Perl but can't figure out what is wrong with my regex statement ?

Comment on Re^2: Perl or SQL ? Download Code

Replies are listed 'Best First'.
Re^3: Perl or SQL ? by mpeppler (Vicar) on Dec 22, 2005 at 08:38 UTC
$sth->fetch returns an array reference, and $sth->fetchrow returns a list. Each item in the array or list is a column in the SELECT statement. So: `$sth = $dbh->prepare("select a, b, c from foo"); $sth->execute; while($row = $sth->fetch) { # $row->[0] is column 'a' # $row->[1] is column 'b', # etc... }` [download] and `while(($one, $two, $three) = $sth->fetchrow_array) { # $one, $two and $three are columns a, b and c }` [download] Michael	[reply] [d/l] [select]
Re^3: Perl or SQL ? by Anonymous Monk on Dec 21, 2005 at 10:29 UTC
I've just figured it out `$sth=$dbh->prepare("@sqlcmd"); $sth->execute; while (($data) = $sth->fetchrow) { if($data =~ /create/) { print "$data\n"; } }` [download] I've simplified the regex I really need to use to demonstrate what I was attempting to do. I agree that for larger datasets the create view/bcp out is the way to go. Performance testing has revealed this to be the case. Thanks for all the responses, this is a top class site	[reply] [d/l]
Re^4: Perl or SQL ? by Anonymous Monk on Dec 21, 2005 at 10:44 UTC
Err I need to eat humble pie. The above code only works if I change the select to retrieve one column from sysaudits not all columns. Please disregard my previous post. I still have the same problem	[reply]


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