Re^2: selectall_arrayref with headers

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;
[download]

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

Comment on Re^2: selectall_arrayref with headers Download Code

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Re^3: selectall_arrayref with headers by Corion (Patriarch) 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.	[reply] [d/l] [select]

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Re^3: selectall_arrayref with headers
by Corion (Patriarch) 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.

[reply]
[d/l]
[select]

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