set_cmp set_eq set_ge set_gt set_le set_lt set_ne span_cmp span_eq span_ge span_gt span_le span_lt span_ne spanset_cmp spanset_eq spanset_ge spanset_gt spanset_le spanset_lt spanset_ne

set_lt() bool set_lt ( const Set *  s1, const Set *  s2  ) Return true if the first set is less than the second one. SQL Operator: <