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Postings from December 2002
To: beginners@perl.org
From: "Craig Williams" <news@ip80.com>
Subject: Really stuck: DBI, mysqlPP.
Date sent: Tue, 31 Dec 2002 00:48:44 -0000
> Ok, firstly - I don't believe this is a mysql issue as I have a
> working server which I can prove and the fact I've just learnt Perl
> was my reason for posting here, maybe I've screwed up the syntax.
>
> I just installed the modules for DBI and MySQL and they seem to work
> great except for one aspect. Getting column names.
>
> Code example; (code sits in a debug sub)
>
> my $sq = $myconn->prepare("show columns from as_codes;");
> $sq->execute();
> while (@tmp = $sq->fetchrow_array())
> {
> print $tmp[0], "\n";
> }
>
> $myconn is a working connection: the select statements work great.
>
> The above always produces nothing, the while loop never runs. I've
> also tried the "describe" sql statement but I get the same results.
> The table as_codes has about 12 columns. I even tried the DBI, {NAME}
> option but got no columns returned.
>
> If I go into mysql admin and type the above statement then it works.
Most probably the
show columns ...
is not a SQL command, but a mysql admin one.
Try
my $sq = $myconn->prepare("select * from as_codes where 1 = 0;");
$sq->execute(); # may not be necessary
@columns = @{$sq->{NAME}};
HTH, Jenda
===== Jenda@Krynicky.cz === http://Jenda.Krynicky.cz =====
When it comes to wine, women and song, wizards are allowed
to get drunk and croon as much as they like.
-- Terry Pratchett in Sourcery
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