add except priority order

Author: antgonza

qiita_db/sql_connection.py

@@ -198,7 +198,10 @@ def _raise_execution_error(self, sql, sql_args, error):
             ec_lu = errorcodes.lookup(error.pgcode)
             raise ValueError(
                 "Error running SQL: %s. MSG: %s\n" % (ec_lu, str(error)))
-        except (KeyError, AttributeError, TypeError, ValueError):
+        # the order of except statements is important, do not change
+        except (KeyError, AttributeError, TypeError) as error:
+            raise ValueError("Error running SQL query: %s" % str(error))
+        except ValueError as error:
             raise ValueError("Error running SQL query: %s" % str(error))
 
     @_checker