/ 
DBIx-Class-Async-0.55
/ DBIx::Class::Async::ResultSetColumn

NAME

DBIx::Class::Async::ResultSetColumn - Asynchronous operations on a single ResultSource column

VERSION

Version 0.55

SYNOPSIS

my $rs = $schema->resultset('Invoice')->search({ status => 'unpaid' });
my $col = $rs->get_column('amount');

# All methods return a Future
$col->sum->then(sub {
    my $total = shift;
    say "Total unpaid: $total";
});

$col->max->on_done(sub {
    my $highest = shift;
    say "Highest unpaid invoice: $highest";
});

DESCRIPTION

A ResultSetColumn object represents a specific column within a DBIx::Class::Async::ResultSet. It is used to perform aggregate operations (like summation or averaging) or to fetch single-column data sets asynchronously.

This object is typically obtained by calling get_column on a DBIx::Class::Async::ResultSet object.

METHODS

sum

Returns a Future resolving to the sum of all values in the column.

max / min

Returns a Future resolving to the maximum or minimum value in the column, respectively.

avg / average

Returns a Future resolving to the average (mean) value of the column.

count

Returns a Future resolving to the count of values in the column.

INTERNAL METHODS

new

Instantiates a new column proxy. Requires resultset, column, and async_db.

_aggregate

The core dispatcher that builds the worker payload. It extracts the current search criteria from the parent ResultSet and appends the target column name before calling the background worker.

AUTHOR

Mohammad Sajid Anwar, <mohammad.anwar at yahoo.com>

REPOSITORY

https://github.com/manwar/DBIx-Class-Async

BUGS

Please report any bugs or feature requests through the web interface at https://github.com/manwar/DBIx-Class-Async/issues. I will be notified and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc DBIx::Class::Async::ResultSetColumn

You can also look for information at:

LICENSE AND COPYRIGHT

Copyright (C) 2026 Mohammad Sajid Anwar.

This program is free software; you can redistribute it and / or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at: http://www.perlfoundation.org/artistic_license_2_0 Any use, modification, and distribution of the Standard or Modified Versions is governed by this Artistic License.By using, modifying or distributing the Package, you accept this license. Do not use, modify, or distribute the Package, if you do not accept this license. If your Modified Version has been derived from a Modified Version made by someone other than you,you are nevertheless required to ensure that your Modified Version complies with the requirements of this license. This license does not grant you the right to use any trademark, service mark, tradename, or logo of the Copyright Holder. This license includes the non-exclusive, worldwide, free-of-charge patent license to make, have made, use, offer to sell, sell, import and otherwise transfer the Package with respect to any patent claims licensable by the Copyright Holder that are necessarily infringed by the Package. If you institute patent litigation (including a cross-claim or counterclaim) against any party alleging that the Package constitutes direct or contributory patent infringement,then this Artistic License to you shall terminate on the date that such litigation is filed. Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.