BUG23590083: Fix issue while fetching date datatype from table

Fetching data from a table was giving an error while processing date
column metadata.

This patch fixes this bug as well as BUG23606320.

Tests were changed for regression.

Author: nmariz

lib/mysqlx/result.py

@@ -466,7 +466,8 @@ def _map_datetime(self):
             self._col_type = ColumnType.DATETIME
         elif self._flags & DatetimeColumnFlags.TIMESTAMP > 0:
             self._col_type = ColumnType.TIMESTAMP
-        raise ValueError("Datetime mapping scenario unhandled")
+        else:
+            raise ValueError("Datetime mapping scenario unhandled")
 
     def _map_type(self):
         if self._proto_type == ColumnProtoType.SINT:

tests/test_mysqlx_crud.py

@@ -520,18 +520,18 @@ def test_column_metadata(self):
 
         self.node_session.sql(
             "CREATE TABLE {0}(age INT, name VARCHAR(50), pic VARBINARY(100), "
-            "config JSON)".format(table_name)).execute()
+            "config JSON, created DATE)".format(table_name)).execute()
         self.node_session.sql(
-            "INSERT INTO {0} VALUES (21, 'Fred', NULL, NULL)"
+            "INSERT INTO {0} VALUES (21, 'Fred', NULL, NULL, '2008-07-26')"
             "".format(table_name)).execute()
         self.node_session.sql(
-            "INSERT INTO {0} VALUES (28, 'Barney', NULL, NULL)"
+            "INSERT INTO {0} VALUES (28, 'Barney', NULL, NULL, '2012-03-12')"
             "".format(table_name)).execute()
         self.node_session.sql(
-            "INSERT INTO {0} VALUES (42, 'Wilma', NULL, NULL)"
+            "INSERT INTO {0} VALUES (42, 'Wilma', NULL, NULL, '1975-11-11')"
             "".format(table_name)).execute()
         self.node_session.sql(
-            "INSERT INTO {0} VALUES (67, 'Betty', NULL, NULL)"
+            "INSERT INTO {0} VALUES (67, 'Betty', NULL, NULL, '2015-06-21')"
             "".format(table_name)).execute()
 
         table = self.schema.get_table("test")