sqltriples.TripleStore

Module sqltriples :: Class TripleStore

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Class TripleStore

A triple store whose contents are stored in an SQL-accessible database table.

Method Summary
	`__init__(self, connection, context, table_name, sequence_name, debug)` Initialise access to the store via the given 'connection' and employing the given, optional 'context' URI, using a table with the given, optional 'table_name' ("triples" by default) and a sequence (for BNode generation) with the optional 'sequence_name' ("bnode" by default).
	`add(self, pattern)` Add a triple using the information found in the given 'pattern'.
	`close(self)` Close the connection to the database system.
	`commit(self)` Commit the changes made to the triple store.
	`contexts(self)` Return a list of contexts found in this store.
	`count(self, pattern)` Return a count of the triples conforming to the given 'pattern'.
	`delete(self)` Drop the store's table and sequence.
	`delete_sequence(self)` Drop the BNode sequence.
	`delete_table(self)` Drop the triple store's table.
	`get_context(self, context)` Return a copy of this store which uses the given 'context' to constrain operations on the stored triples.
	`init(self)` Initialise the database by creating a table and a sequence.
	`init_sequence(self)` Initialise the BNode sequence.
	`init_table(self)` Initialise the triple store's table.
	`objects(self, subject, predicate, ordering, limit)` Return objects for the given 'subject' and/or 'predicate' identifiers.
	`predicates(self, subject, object, ordering, limit)` Return predicates for the given 'subject' and/or 'object' identifiers.
	`remove(self, pattern)` Remove all triples conforming to the given 'pattern'.
	`remove_context(self, context)` Removes the specified 'context' from the database.
	`rollback(self)` Roll back (undo) the changes made to the triple store.
	`subject(self, subject)` Return a Subject for the given 'subject' identifier.
	`subjects(self, predicate, object, ordering, limit)` Return subjects for the given 'predicate' and/or 'object' identifiers.
	`triples(self, pattern, ordering, limit)` Return triples conforming to the given 'pattern'.

Class Variable Summary
`dict`	`codes_to_names` = `{'B': 'BNode', 'U': 'URIRef', 'L': 'Lit...`
`dict`	`names_to_codes` = `{'Literal': 'L', 'BNode': 'B', 'Namespa...`
`str`	`null_context` = `'None'`
`dict`	`paramdict` = `{'named': 1, 'format': 0, 'pyformat': 1, 'nu...`

Method Details

init(self, connection, context=None, table_name=None, sequence_name=None, debug=0)
(Constructor)

Initialise access to the store via the given 'connection' and employing the given, optional 'context' URI, using a table with the given, optional 'table_name' ("triples" by default) and a sequence (for BNode generation) with the optional 'sequence_name' ("bnode" by default).

If the optional 'debug' parameter is set to a true value, the SQL statements issued to the database system will be displayed on standard output.

add(self, pattern)

Add a triple using the information found in the given 'pattern'.

close(self)

Close the connection to the database system.

commit(self)

Commit the changes made to the triple store.

contexts(self)

Return a list of contexts found in this store.

count(self, pattern)

Return a count of the triples conforming to the given 'pattern'.

delete(self)

Drop the store's table and sequence.

delete_sequence(self)

Drop the BNode sequence.

delete_table(self)

Drop the triple store's table.

get_context(self, context)

Return a copy of this store which uses the given 'context' to constrain operations on the stored triples.

init(self)

Initialise the database by creating a table and a sequence.

init_sequence(self)

Initialise the BNode sequence.

init_table(self)

Initialise the triple store's table.

objects(self, subject=None, predicate=None, ordering=None, limit=None)

Return objects for the given 'subject' and/or 'predicate' identifiers.

predicates(self, subject=None, object=None, ordering=None, limit=None)

Return predicates for the given 'subject' and/or 'object' identifiers.

remove(self, pattern)

Remove all triples conforming to the given 'pattern'.

remove_context(self, context)

Removes the specified 'context' from the database.

rollback(self)

Roll back (undo) the changes made to the triple store.

subject(self, subject)

Return a Subject for the given 'subject' identifier.

subjects(self, predicate=None, object=None, ordering=None, limit=None)

Return subjects for the given 'predicate' and/or 'object' identifiers.

triples(self, pattern, ordering=None, limit=None)

Return triples conforming to the given 'pattern'.

Class Variable Details

codes_to_names

Type:: dict
Value:: {'B': 'BNode', 'U': 'URIRef', 'L': 'Literal'}

names_to_codes

Type:: dict
Value:: {'Literal': 'L', 'BNode': 'B', 'Namespace': 'U', 'URIRef': 'U'}

null_context

Type:: str
Value:: 'None'

paramdict

Type:: dict
Value:: {'named': 1, 'format': 0, 'pyformat': 1, 'numeric': 0, 'qmark': 0}

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