1RDF::Redland::QueryResuUlstesr(3C)ontributed Perl DocumeRnDtFa:t:iRoendland::QueryResults(3)
2
3
4

NAME

6       RDF::Redland::QueryResults - Redland RDF Syntax Query Results Class
7

SYNOPSIS

9         use RDF::Redland;
10
11         ...
12         my $query=new RDF::Redland::Query("query string", undef, undef, "sparql");
13         my $results=$model->query_execute($query);
14         # or my $results=$query->execute($model);
15         while(!$results->finished) {
16           for (my $i=0; $i < $results->bindings_count(); $i++) {
17             my $name=$results->binding_name($i);
18             my $value=$results->binding_value($i);
19             # ... do something with the results
20           }
21           $results->next_result;
22         }
23
24       The $results in the example is an object of class
25       RDF::Redland::QueryResults.
26

DESCRIPTION

28       This class represents queries of various syntaxes over an
29       RDF::Redland::Model returning a sequence of results that bind variable
30       names to RDF::Redland::Node values.
31

CONSTRUCTOR

33       There are no public constructors.
34

METHODS

36       count
37           Return the number of current results from the query.
38
39       finished
40           Return non-0 if the results have been exhausted.
41
42       binding_name INDEX
43           Get the name of variable binding INDEX in the array of variable
44           names.
45
46       binding_names
47           Get the names all of the variable bindings as an array.
48
49       binding_value INDEX
50           Get the value of the variable binding INDEX in the current query
51           result.
52
53       binding_values
54           Get the values of all of the variable bindings in the current query
55           result.
56
57       binding_value_by_name NAME
58           Get the value of the variable binding NAME in the current query
59           result.
60
61       bindings
62           Get the variable names and values of the current query result as a
63           hash
64
65       bindings_count
66           Return the number of variable bindings.
67
68       next_result
69           Move to the next query result.
70
71       as_stream
72           Return a new RDF::Redland::Stream object representing the query
73           results as an RDF Graph.
74
75       to_string [FORMAT-URI [BASE-URI]]
76           Serialize to a string syntax in format FORMAT-URI using the
77           optional BASE-URI.  The default format when none is given is
78           determined by librdf_query_results_to_string.
79
80       is_bindings
81           Return non-0 if the query results format is variable bindings
82
83       is_boolean
84           Return non-0 if the query results format is a boolean
85
86       is_graph
87           Return non-0 if the query results format is an RDF graph
88
89       get_boolean
90           Get the boolean query result; non-0 is true.
91

SEE ALSO

93       RDF::Redland::Query
94

AUTHOR

96       Dave Beckett - http://www.dajobe.org/
97
98
99
100perl v5.28.1                      2011-02-04     RDF::Redland::QueryResults(3)
Impressum