diff options
Diffstat (limited to 'lib/sqlalchemy/sql/compiler.py')
| -rw-r--r-- | lib/sqlalchemy/sql/compiler.py | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/lib/sqlalchemy/sql/compiler.py b/lib/sqlalchemy/sql/compiler.py index f8f4d1dda..61b6d22d0 100644 --- a/lib/sqlalchemy/sql/compiler.py +++ b/lib/sqlalchemy/sql/compiler.py @@ -361,7 +361,12 @@ class SQLCompiler(Compiled): # column/label name, ColumnElement object (if any) and # TypeEngine. ResultProxy uses this for type processing and # column targeting - self.result_map = {} + self._result_columns = [] + + # if False, means we can't be sure the list of entries + # in _result_columns is actually the rendered order. This + # gets flipped when we use TextAsFrom, for example. + self._ordered_columns = True # true if the paramstyle is positional self.positional = dialect.positional @@ -388,6 +393,22 @@ class SQLCompiler(Compiled): if self.positional and dialect.paramstyle == 'numeric': self._apply_numbered_params() + @property + def result_map(self): + d = {} + for elem in self._result_columns: + key, rec = elem[0], elem[1:] + if key in d: + # conflicting keyname, just double up the list + # of objects. this will cause an "ambiguous name" + # error if an attempt is made by the result set to + # access. + e_name, e_obj, e_type = d[key] + d[key] = e_name, e_obj + rec[1], e_type + else: + d[key] = rec + return d + @util.memoized_instancemethod def _init_cte_state(self): """Initialize collections related to CTEs only if @@ -678,6 +699,7 @@ class SQLCompiler(Compiled): ) if populate_result_map: + self._ordered_columns = False for c in taf.column_args: self.process(c, within_columns_clause=True, add_to_result_map=self._add_to_result_map) @@ -1241,15 +1263,7 @@ class SQLCompiler(Compiled): if not self.dialect.case_sensitive: keyname = keyname.lower() - if keyname in self.result_map: - # conflicting keyname, just double up the list - # of objects. this will cause an "ambiguous name" - # error if an attempt is made by the result set to - # access. - e_name, e_obj, e_type = self.result_map[keyname] - self.result_map[keyname] = e_name, e_obj + objects, e_type - else: - self.result_map[keyname] = name, objects, type_ + self._result_columns.append((keyname, name, objects, type_)) def _label_select_column(self, select, column, populate_result_map, @@ -1439,9 +1453,11 @@ class SQLCompiler(Compiled): (inner_col[c._key_label], c) for c in select.inner_columns ) - for key, (name, objs, typ) in list(self.result_map.items()): - objs = tuple([d.get(col, col) for col in objs]) - self.result_map[key] = (name, objs, typ) + + self._result_columns = [ + (key, name, tuple([d.get(col, col) for col in objs]), typ) + for key, name, objs, typ in self._result_columns + ] _default_stack_entry = util.immutabledict([ ('iswrapper', False), |