66 ColumnAlias._q_invariant = False  # avoid to check for ColumnAlias / Variable

    66 ColumnAlias._q_invariant = False  # avoid to check for ColumnAlias / Variable

    67 

    67 

    68 

    68 

    69 def default_update_cb_stack(self, stack):

    69 def default_update_cb_stack(self, stack):

    70     stack.append(self.source_execute)

    70     stack.append(self.source_execute)

    71 FunctionDescr.update_cb_stack = default_update_cb_stack

    73 FunctionDescr.update_cb_stack = default_update_cb_stack

    72 FunctionDescr.source_execute = None

    74 FunctionDescr.source_execute = None

    73 

    75 

    74 

    76 

    75 def length_source_execute(source, session, value):

    77 def length_source_execute(source, session, value):

    76     return len(value.getvalue())

    78     return len(value.getvalue())

    77 

    80 

    78 LENGTH = get_func_descr('LENGTH')

    81 LENGTH = get_func_descr('LENGTH')

    79 LENGTH.source_execute = length_source_execute

    82 LENGTH.source_execute = length_source_execute

    80 

    83 

    81 

    84