NAME

RDF::Query::Algebra::Aggregate - Algebra class for aggregate patterns

VERSION

This document describes RDF::Query::Algebra::Aggregate version 2.918.

Beyond the methods documented below, this class inherits methods from the RDF::Query::Algebra class.

"new ( $pattern, \@groupby, $alias =" [$op => $col] )>
"new ( $pattern, \@groupby, expressions =" [ $alias => [$op, \%options, @cols] ] )>: Returns a new Aggregate structure. Groups by the named bindings in @groupby, and returns new bindings for the named $alias for the operation $op on column $col.
$op may be one of: COUNT, MIN, MAX, SUM.
"construct_args": Returns a list of arguments that, passed to this class' constructor, will produce a clone of this algebra pattern.
"pattern": Returns the aggregates pattern.
"groupby": Returns the aggregate's GROUP BY binding names.
"ops": Returns a list of tuples as ARRAY refs containing "$alias, $op, @cols".
"sse": Returns the SSE string for this algebra expression.
"as_sparql": Returns the SPARQL string for this algebra expression.
"as_hash": Returns the query as a nested set of plain data structures (no objects).
"type": Returns the type of this algebra expression.
"referenced_variables": Returns a list of the variable names used in this algebra expression.
"potentially_bound": Returns a list of the variable names used in this algebra expression that will bind values during execution.
"definite_variables": Returns a list of the variable names that will be bound after evaluating this algebra expression.

 Gregory Todd Williams <gwilliams@cpan.org>