1Attean::AggregateExpresUssieorn(C3o)ntributed Perl DocumAetntteaatni:o:nAggregateExpression(3)
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6 Attean::AggregateExpression - Representation of aggregate expression
7 trees
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10 This document describes Attean::AggregateExpression version 0.030
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13 The Attean::AggregateExpression class represents an expression tree
14 where the root node is an aggregate operation (e.g. SUM(?a) or
15 COALESCE(?a/?b, ?c, 0)).
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18 This role consumes the Attean::API::AggregateExpression role.
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21 The following attributes exist:
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23 "operator"
24 The name of the aggregate operator, from the allowable set: COUNT,
25 SUM, MIN, MAX, AVG, GROUP_CONCAT, SAMPLE.
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27 "scalar_vars"
28 A HASH reference of scalar variables. The only scalar variable
29 defined for SPARQL 1.1 is 'seperator', a string separator used with
30 the GROUP_CONCAT aggregate.
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32 "distinct"
33 A boolean indicating whether the aggregate should operate over
34 distinct term sets, or full multisets.
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36 "variable"
37 A Attean::API::Variable object which will be bound to the produced
38 aggregate value in results.
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41 Please report any bugs or feature requests to through the GitHub web
42 interface at <https://github.com/kasei/attean/issues>.
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46 Gregory Todd Williams "<gwilliams@cpan.org>"
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49 Copyright (c) 2014--2020 Gregory Todd Williams. This program is free
50 software; you can redistribute it and/or modify it under the same terms
51 as Perl itself.
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55perl v5.34.0 2022-01-20 Attean::AggregateExpression(3)