NAME

Attean::API::AggregateExpression - Role representing an aggregate expression tree

VERSION

This document describes Attean::API::AggregateExpression version 0.021

SYNOPSIS

  use v5.14;
  use Attean;

DESCRIPTION

This is a Moo role representing aggregate expressions.

ROLES

This role consumes Attean::API::DirectedAcyclicGraph.

REQUIRED METHODS

Classes consuming this role must provide the following methods:

operator()

The name of the aggregate operator.

scalar_vars()

A HASH reference of scalar variables. The only scalar variable defined for SPARQL 1.1 is 'seperator', a string separator used with the GROUP_CONCAT aggregate.

BUGS

Please report any bugs or feature requests to through the GitHub web interface at https://github.com/kasei/attean/issues.

SEE ALSO

AUTHOR

Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT

Copyright (c) 2014--2018 Gregory Todd Williams. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.