Package sqltriples :: Module Query :: Class Results
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Class Results

AbstractQuery --+    
                |    
            Query --+
                    |
                   Results

Known Subclasses:
CountableResults, SingleResults, Triples, Tuples

A class representing a selection of results obtained by specifying a
pattern.

Method Summary
  __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
    Inherited from AbstractQuery
list table_columns = [('subject', 'subject_type', 0), ('predi...

Method Details

__init__(self, store, pattern, expression=None, functions=None, ordering=None, order_by=None, limit=None, partial=0)
(Constructor)

Initialise the results object with the given 'store', 'pattern',
optional 'expression', optional 'ordering' and 'order_by' descriptions
and optional 'limit' criteria. Where a 'partial' result is requested,
outer joins will be employed to find tuples which are shorter than the
pattern.
Overrides:
sqltriples.Query.Query.__init__

_get_joins(self, index)

Add joins where the result needs them:
... inner join T1 on ... inner join T2 on ...
... left outer join T1 on ... left outer join T2 on ...

_get_query(self, select_clause, index, new_index, constraints=None, constraint_values=None)

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. The supplied 'new_index' specifies the latest
table index in use, and the optional 'constraints' (a query string) and
'constraint_values' (a list of values) provide additional qualification
of the query.

Return a 3-tuple containing the query text, query values and the updated
table index.

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