DEE and DUM
Posted: Thu Jan 09, 2014 8:53 pm
I have not got the usage of DEE and DUM sorted out. How do I amend the following examples to initialise a relvar to empty?
Code: Select all
VAR Test BASE RELATION { A0 INT } INIT ( RELATION { TUPLE { A0 999 } } ) KEY { A0 };
Ok.
VAR Test1 BASE RELATION { A0 INT } INIT ( DEE ) KEY { A0 };
ERROR: Variable of type RELATION {A0 INTEGER} cannot be initialised with an expression of type RELATION {}
Line 1
VAR Test2 BASE RELATION { A0 INT } INIT ( DUM ) KEY { A0 };
ERROR: Variable of type RELATION {A0 INTEGER} cannot be initialised with an expression of type RELATION {}
Line 1