remove df optimization

olapy/core/mdx/executor/execute_db.py

@@ -9,60 +9,62 @@ import pandas.io.sql as psql
 # execute csv files if they respect olapy's start schema model,
 # and execute data base tables if they respect olapy's start schema model)
 
-class StringFolder(object):
-    """
-    Class that will fold strings. See 'fold_string'.
-    This object may be safely deleted or go out of scope when
-    strings have been folded.
-    """
-    def __init__(self):
-        self.unicode_map = {}
-
-    def fold_string(self, s):
-        """
-        Given a string (or unicode) parameter s, return a string object
-        that has the same value as s (and may be s). For all objects
-        with a given value, the same object will be returned. For unicode
-        objects that can be coerced to a string with the same value, a
-        string object will be returned.
-        If s is not a string or unicode object, it is returned unchanged.
-        :param s: a string or unicode object.
-        :return: a string or unicode object.
-        """
-        # If s is not a string or unicode object, return it unchanged
-        if not isinstance(s, basestring):
-            return s
-
-        # If s is already a string, then str() has no effect.
-        # If s is Unicode, try and encode as a string and use intern.
-        # If s is Unicode and can't be encoded as a string, this try
-        # will raise a UnicodeEncodeError.
-        try:
-            return intern(str(s))
-        except UnicodeEncodeError:
-            # Fall through and handle s as Unicode
-            pass
-
-        # Look up the unicode value in the map and return
-        # the object from the map. If there is no matching entry,
-        # store this unicode object in the map and return it.
-        return self.unicode_map.setdefault(s, s)
 
 
-def string_folding_wrapper(results):
-    """
-    This generator yields rows from the results as tuples,
-    with all string values folded.
-    """
-    # Get the list of keys so that we build tuples with all
-    # the values in key order.
-    keys = results.keys()
-    folder = StringFolder()
-    for row in results:
-        yield tuple(
-            folder.fold_string(row[key])
-            for key in keys
-        )
+# class StringFolder(object):
+#     """
+#     Class that will fold strings. See 'fold_string'.
+#     This object may be safely deleted or go out of scope when
+#     strings have been folded.
+#     """
+#     def __init__(self):
+#         self.unicode_map = {}
+#
+#     def fold_string(self, s):
+#         """
+#         Given a string (or unicode) parameter s, return a string object
+#         that has the same value as s (and may be s). For all objects
+#         with a given value, the same object will be returned. For unicode
+#         objects that can be coerced to a string with the same value, a
+#         string object will be returned.
+#         If s is not a string or unicode object, it is returned unchanged.
+#         :param s: a string or unicode object.
+#         :return: a string or unicode object.
+#         """
+#         # If s is not a string or unicode object, return it unchanged
+#         if not isinstance(s, basestring):
+#             return s
+#
+#         # If s is already a string, then str() has no effect.
+#         # If s is Unicode, try and encode as a string and use intern.
+#         # If s is Unicode and can't be encoded as a string, this try
+#         # will raise a UnicodeEncodeError.
+#         try:
+#             return intern(str(s))
+#         except UnicodeEncodeError:
+#             # Fall through and handle s as Unicode
+#             pass
+#
+#         # Look up the unicode value in the map and return
+#         # the object from the map. If there is no matching entry,
+#         # store this unicode object in the map and return it.
+#         return self.unicode_map.setdefault(s, s)
+#
+#
+# def string_folding_wrapper(results):
+#     """
+#     This generator yields rows from the results as tuples,
+#     with all string values folded.
+#     """
+#     # Get the list of keys so that we build tuples with all
+#     # the values in key order.
+#     keys = results.keys()
+#     folder = StringFolder()
+#     for row in results:
+#         yield tuple(
+#             folder.fold_string(row[key])
+#             for key in keys
+#         )
 
 # TODO try pandas.read_sql_table and pandas.read_sql