Package sqltriples :: Module Query :: Class Triples
[show private | hide private]
[frames | no frames]

Class Triples

AbstractQuery --+        
                |        
            Query --+    
                    |    
              Results --+
                        |
                       Triples

Known Subclasses:
ConjunctionOfTriples, DisjunctionOfTriples, IntersectionOfTriples, NegationOfTriples

A class representing a selection of triples.

Method Summary
  _get_results(self, results)
    Inherited from Results
  __init__(self, store, pattern, expression, functions, ordering, order_by, limit, partial)
Initialise the results object with the given 'store', 'pattern', optional 'expression', optional 'ordering' and 'order_by' descriptions and optional 'limit' criteria.
  _get_joins(self, index)
Add joins where the result needs them: ...
  _get_order_column(self, index)
  _get_order_direction(self, index)
  _get_order_extent(self)
  _get_query(self, select_clause, index, new_index, constraints, constraint_values)
Build the query conditions and return a usable query which starts with the supplied 'select_clause' and which uses the given table 'index' number as qualifier.
    Inherited from Query
  __getitem__(self, i)
  __len__(self)
  __repr__(self)
  get_query(self, index, constraints)
Return a query clause, associated values, and an updated table index (as a 3-tuple) for this object's query defined using the given table 'index' and the supplied, optional 'constraints' text.
  get_subquery(self, parent_columns, parent_index, index, match_first, match_parent, match_child)
Make a subquery for this object using the given 'parent_columns' (indicating the columns which connect with this object's exposed columns), a 'parent_index' (indicating the table index used in the parent query, within which the returned query clause shall be employed), and the current table 'index'.
  _apply_function(self, fn, column)
  _ensure(self)
Ensure the the query has been executed.
  _execute(self)
Execute the query, generated by this object's 'get_query' method, and return the results in a form produced by this object's '_get_results' method.
  _get_columns(self, exposed_columns, index, limited_to)
Return a column selection for the 'exposed_columns' qualified by the given table 'index', optionally limited by the given 'limited_to' sequence of column definitions.
  _get_join_constraints(self, parent_columns, child_columns, parent_index, child_index)
  _get_table(self, index)
    Inherited from AbstractQuery
  _get_exposed_columns(self)

Class Variable Summary
list exposed_columns = [('subject', 'subject_type'), ('predic...
    Inherited from AbstractQuery
list table_columns = [('subject', 'subject_type', 0), ('predi...

Class Variable Details

exposed_columns

Type:
list
Value:
[('subject', 'subject_type'), ('predicate', None), ('object', 'object_\
type')]                                                                

Generated by Epydoc 2.1 on Fri Jan 12 00:04:34 2007 http://epydoc.sf.net