Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

Re^2: selectall_arrayref with headers

by eddor1614 (Beadle)
on May 16, 2012 at 20:23 UTC ( #970913=note: print w/replies, xml ) Need Help??

in reply to Re: selectall_arrayref with headers
in thread selectall_arrayref with headers

The problem is that the select statements are somewhat complex, and I'm trying to use the same array iteration for different SELECT statements.
An example:

my $dbfile = "/tmp/storagedb.sqlite"; my $db; my $rep = (); my $selectstring = shift; # Subs $db = DBI->connect("dbi:SQLite:$dbfile","","") or die "ERROR: $!"; $rep = $db->selectall_arrayref($selectstring); if (@$rep) { foreach my $i (@$rep) { foreach my $j (@$i) { print "$j | "; } print $/; } } $db->disconnect;

I need to put headers before the data, but the $selectstring may have different columns.

Replies are listed 'Best First'.
Re^3: selectall_arrayref with headers
by Corion (Pope) on May 16, 2012 at 20:31 UTC

    The Slice => {} option retrieves all column names for each row, as it returns hashes. You can then use these as the keys.

    An (somewhat ugly) alternative is to add WHERE 1 = 0 to the query and run it and afterwards ask the statement handle for the names of its columns. This has the advantage of keeping all columns in the same order as the select clause, but has the disadvantage of needing to shim the clause into an existing string.

    DBI has more on the topic.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://970913]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (10)
As of 2018-10-22 12:33 GMT
Find Nodes?
    Voting Booth?
    When I need money for a bigger acquisition, I usually ...

    Results (119 votes). Check out past polls.

    • (Sep 10, 2018 at 22:53 UTC) Welcome new users!