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Gregory Todd Williams

NAME

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

VERSION

This document describes RDF::Trine::Store::DBI version 0.122

SYNOPSIS

 use RDF::Trine::Store::DBI;

DESCRIPTION

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

METHODS

new ( $model_name, $dbh )
new ( $model_name, $dsn, $user, $pass )

Returns a new storage object using the supplied arguments to construct a DBI object for the underlying database.

temporary_store
get_statements ($subject, $predicate, $object [, $context] )

Returns a stream object of all statements matching the specified subject, predicate and objects. Any of the arguments may be undef to match any value.

get_pattern ( $bgp [, $context] )

Returns a stream object of all bindings matching the specified graph pattern.

get_contexts

Returns an RDF::Trine::Iterator over the RDF::Trine::Node objects comprising the set of contexts of the stored quads.

add_statement ( $statement [, $context] )

Adds the specified $statement to the underlying model.

remove_statement ( $statement [, $context])

Removes the specified $statement from the underlying model.

remove_statements ( $subject, $predicate, $object [, $context])

Removes the specified $statement from the underlying model.

count_statements ($subject, $predicate, $object)

Returns a count of all the statements matching the specified subject, predicate and objects. Any of the arguments may be undef to match any value.

add_uri ( $uri, $named, $format )

Addsd the contents of the specified $uri to the model. If $named is true, the data is added to the model using $uri as the named context.

add_string ( $data, $base_uri, $named, $format )

Addsd the contents of $data to the model. If $named is true, the data is added to the model using $base_uri as the named context.

add_statement ( $statement )

Adds the specified $statement to the underlying model.

remove_statement ( $statement )

Removes the specified $statement from the underlying model.

variable_columns ( $var )

Given a variable name, returns the set of column aliases that store the values for the column (values for Literals, URIs, and Blank Nodes).

add_variable_values_joins

Modifies the query by adding LEFT JOINs to the tables in the database that contain the node values (for literals, resources, and blank nodes).

_mysql_hash ( $data )

Returns a hash value for the supplied $data string. This value is computed using the same algorithm that Redland's mysql storage backend uses.

_mysql_node_hash ( $node )

Returns a hash value (computed by _mysql_hash for the supplied $node. The hash value is based on the string value of the node and the node type.

statements_table

Returns the name of the Statements table.

statements_prefix

Returns the prefix for the underlying Statements database table.

set_statements_prefix ( $prefix )

Sets the prefix for the underlying Statements database table.

model_name

Returns the name of the underlying model.

make_private_predicate_view ( $prefix, @preds )
dbh

Returns the underlying DBI database handle.

init

Creates the necessary tables in the underlying database.

BUGS

Please report any bugs or feature requests to <gwilliams@cpan.org>.

AUTHOR

Gregory Todd Williams <gwilliams@cpan.org>

COPYRIGHT

Copyright (c) 2006-2010 Gregory Todd Williams. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.