selectall_arrayref with headers

[eddor1614]

Hello everybody.

Anyone knows if it's possible to get column headers with selectall_arrayref using DBI and SQLite?.
Like when you do it from the command line:

sqlite> .headers on
sqlite> select 1 as One,2 as Two;
One|Two
1|2

I know I can get that using selectall_hashref, but I need an array, I want an array !
Thanks

[runrig]

prepare, execute, get headers with $sth->{NAME} (or NAME_uc or NAME_lc), then fetchall_arrayref.

[eddor1614]

that was it. thanks!

[Anonymous Monk]

Get headers first , see table_info in DBI, then use arrayref

See also ORLite

[eddor1614]

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.

[Corion]

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.