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.IX Title "Attean::AggregateExpression 3pm"
.TH Attean::AggregateExpression 3pm "2021-02-14" "perl v5.32.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.nh
.SH "NAME"
Attean::AggregateExpression \- Representation of aggregate expression trees
.SH "VERSION"
.IX Header "VERSION"
This document describes Attean::AggregateExpression version 0.030
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The Attean::AggregateExpression class represents an expression tree where the
root node is an aggregate operation (e.g. \s-1SUM\s0(?a) or \s-1COALESCE\s0(?a/?b, ?c, 0)).
.SH "ROLES"
.IX Header "ROLES"
This role consumes the Attean::API::AggregateExpression role.
.SH "ATTRIBUTES"
.IX Header "ATTRIBUTES"
The following attributes exist:
.ie n .IP """operator""" 4
.el .IP "\f(CWoperator\fR" 4
.IX Item "operator"
The name of the aggregate operator, from the allowable set: \s-1COUNT, SUM, MIN,
MAX, AVG, GROUP_CONCAT, SAMPLE.\s0
.ie n .IP """scalar_vars""" 4
.el .IP "\f(CWscalar_vars\fR" 4
.IX Item "scalar_vars"
A \s-1HASH\s0 reference of scalar variables. The only scalar variable defined for
\&\s-1SPARQL 1.1\s0 is \f(CW\*(Aqseperator\*(Aq\fR, a string separator used with the \s-1GROUP_CONCAT\s0
aggregate.
.ie n .IP """distinct""" 4
.el .IP "\f(CWdistinct\fR" 4
.IX Item "distinct"
A boolean indicating whether the aggregate should operate over distinct term sets, or full multisets.
.ie n .IP """variable""" 4
.el .IP "\f(CWvariable\fR" 4
.IX Item "variable"
A Attean::API::Variable object which will be bound to the produced aggregate value in results.
.SH "BUGS"
.IX Header "BUGS"
Please report any bugs or feature requests to through the GitHub web interface
at <https://github.com/kasei/attean/issues>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.SH "AUTHOR"
.IX Header "AUTHOR"
Gregory Todd Williams  \f(CW\*(C`<gwilliams@cpan.org>\*(C'\fR
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2014\-\-2020 Gregory Todd Williams.
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.