1RDF::Trine::Store::DBI(U3s)er Contributed Perl DocumentatRiDoFn::Trine::Store::DBI(3)
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NAME

6       RDF::Trine::Store::DBI - Persistent RDF storage based on DBI
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VERSION

9       This document describes RDF::Trine::Store::DBI version 1.019
10

SYNOPSIS

12         use RDF::Trine::Store::DBI;
13
14         my $user = 'me';
15         my $pass = 'secret';
16         my $modelname = 'mymodel';
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18         # First, construct a DBI connection to your database
19         my $dsn = "DBI:mysql:database=perlrdf";
20         my $dbh = DBI->connect( $dsn, $user, $pass );
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22         # Second, create a new Store object with the database connection
23         # and specifying (by name) which model in the Store you want to use
24         my $store = RDF::Trine::Store::DBI->new( $modelname, $dbh );
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26         # Finally, wrap the Store objec into a Model, and use it to access your data
27         my $model = RDF::Trine::Model->new($store);
28         print $model->size . " RDF statements in store\n";
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DESCRIPTION

31       RDF::Trine::Store::DBI provides a persistent triple-store using the DBI
32       module.
33

METHODS

35       Beyond the methods documented below, this class inherits methods from
36       the RDF::Trine::Store class.
37
38       "new ( $model_name, $dbh )"
39       "new ( $model_name, $dsn, $user, $pass )"
40           Returns a new storage object using the supplied arguments to
41           construct a DBI object for the underlying database.
42
43       "new_with_config ( $hashref )"
44           Returns a new storage object configured with a hashref with certain
45           keys as arguments.
46
47           The "storetype" key must be "DBI" for this backend.
48
49           These keys should also be used:
50
51           "name"
52               The name of the model.
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54           "dsn"
55               The DBI Data Source Name for the underlying database.
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57           "username"
58               The username of the database user.
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60           "password"
61               The password of the database user.
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63       "new_with_object ( $dbi_db )"
64           Initialize the store with a DBI::db object.
65
66       "nuke"
67           Permanently removes the store and its data. Note that because of
68           this module's use of the Redland schema, removing a store with this
69           method will only delete the Statements table and remove the model's
70           entry in the Models table. The node entries in the Literals,
71           Bnodes, and Resources tables will still exist.
72
73       "supports ( [ $feature ] )"
74           If $feature is specified, returns true if the feature is supported
75           by the store, false otherwise. If $feature is not specified,
76           returns a list of supported features.
77
78       "temporary_store"
79       "clear_restrictions"
80           Clear's the restrictions put on the binding of node types to the
81           different statement positions. By default, the subject position is
82           restricted to resources and blank nodes, and the predicate position
83           to only resources. Calling this method will allow any node type in
84           any statement position.
85
86       "get_statements ($subject, $predicate, $object [, $context] )"
87           Returns a stream object of all statements matching the specified
88           subject, predicate and objects. Any of the arguments may be undef
89           to match any value.
90
91       "get_pattern ( $bgp [, $context] )"
92           Returns a stream object of all bindings matching the specified
93           graph pattern.
94
95       "get_contexts"
96           Returns an RDF::Trine::Iterator over the RDF::Trine::Node objects
97           comprising the set of contexts of the stored quads.
98
99       "add_statement ( $statement [, $context] )"
100           Adds the specified $statement to the underlying model.
101
102       "remove_statement ( $statement [, $context])"
103           Removes the specified $statement from the underlying model.
104
105       "remove_statements ( $subject, $predicate, $object [, $context])"
106           Removes the specified $statement from the underlying model.
107
108       "count_statements ($subject, $predicate, $object)"
109           Returns a count of all the statements matching the specified
110           subject, predicate and objects. Any of the arguments may be undef
111           to match any value.
112
113       "add_uri ( $uri, $named, $format )"
114           Addsd the contents of the specified $uri to the model.  If $named
115           is true, the data is added to the model using $uri as the named
116           context.
117
118       "add_string ( $data, $base_uri, $named, $format )"
119           Addsd the contents of $data to the model. If $named is true, the
120           data is added to the model using $base_uri as the named context.
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122       "add_statement ( $statement )"
123           Adds the specified $statement to the underlying model.
124
125       "remove_statement ( $statement )"
126           Removes the specified $statement from the underlying model.
127
128       "variable_columns ( $var )"
129           Given a variable name, returns the set of column aliases that store
130           the values for the column (values for Literals, URIs, and Blank
131           Nodes).
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133       "add_variable_values_joins"
134           Modifies the query by adding LEFT JOINs to the tables in the
135           database that contain the node values (for literals, resources, and
136           blank nodes).
137
138       "_mysql_hash ( $data )"
139           Returns a hash value for the supplied $data string. This value is
140           computed using the same algorithm that Redland's mysql storage
141           backend uses.
142
143       "_mysql_node_hash ( $node )"
144           Returns a hash value (computed by "_mysql_hash" for the supplied
145           $node.  The hash value is based on the string value of the node and
146           the node type.
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148       "statements_table"
149           Returns the name of the Statements table.
150
151       "statements_prefix"
152           Returns the prefix for the underlying Statements database table.
153
154       "set_statements_prefix ( $prefix )"
155           Sets the prefix for the underlying Statements database table.
156
157       "model_name"
158           Returns the name of the underlying model.
159
160       "make_private_predicate_view ( $prefix, @preds )"
161       "dbh"
162           Returns the underlying DBI database handle.
163
164       "init"
165           Creates the necessary tables in the underlying database.
166

BUGS

168       Please report any bugs or feature requests to through the GitHub web
169       interface at <https://github.com/kasei/perlrdf/issues>.
170

AUTHOR

172       Gregory Todd Williams  "<gwilliams@cpan.org>"
173
175       Copyright (c) 2006-2012 Gregory Todd Williams. This program is free
176       software; you can redistribute it and/or modify it under the same terms
177       as Perl itself.
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181perl v5.30.1                      2020-01-30         RDF::Trine::Store::DBI(3)
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