Oracle Forms Developer – Form Builder Reference, Volume 1

410
PREVENT_MASTERLESS_OPERATION Specifies that operations in
a detail block are not allowed when no corresponding master record exists.
Valid values are PROPERTY_TRUE and PROPERTY_FALSE.
value The following constants can be supplied for the properties described
earlier:
SET_RELATION_PROPERTY restrictions
You can only set one property per call to this built-in.
SET_RELATION_PROPERTY examples
CASCADING Specifies that the MASTER_DELETES property is to be
set so that when an operator deletes a master record, its corresponding
detail records are locked at the same time as the master records are locked.
ISOLATED Specifies that the MASTER_DELETES property is to be set
so that an operator can delete a master record for which detail records exist.
This does not cause subsequent locking and deletion of detail records,
however, Form Builder still initiates detail block coordination in this case.
NON_ISOLATED Specifies that the MASTER_DELETES property is to
be set so that if the operator attempts to delete a master record for which
detail records exist, Form Builder issues an error message and disallows the
deletion.
PROPERTY_TRUE Specifies that the property is to be set to the TRUE
state.
PROPERTY_FALSE Specifies that the property is to be set to the
FALSE state.
/*
** Built-in: SET_RELATION_PROPERTY
** Example: Set the coordination behavior of a relation to
** be deferred, and auto-query.
*/
PROCEDURE Make_Relation_Deferred( rl_name VARCHAR2 ) IS
rl_id Relation;
BEGIN
/*
** Look for the relation’s ID
*/
rl_id := Find_Relation( rl_name );
/*
** Set the two required properties
*/
Set_Relation_Property(rl_id,AUTOQUERY,PROPERTY_TRUE);
END;