FUNCTION acyclic_group_relationship
(relation : group_relationship, relatives : SET [1:?] OF group, specific_relation : STRING) : BOOLEAN;
LOCAL x : SET OF group_relationship; END_LOCAL;
IF relation.relating_group IN relatives THEN RETURN (FALSE); END_IF; x := QUERY(grp <* bag_to_set(USEDIN(relation.relating_group, 'GROUP_SCHEMA.' + 'GROUP_RELATIONSHIP.' + 'RELATED_GROUP')) | specific_relation IN TYPEOF(grp)); REPEAT i := 1 TO HIINDEX(x); IF NOT acyclic_group_relationship(x[i], relatives + relation.relating_group, specific_relation) THEN RETURN (FALSE); END_IF; END_REPEAT; RETURN (TRUE); END_FUNCTION; -- acyclic_group_relationship
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