Adjacent_span_span Adjacent_span_spanset Adjacent_span_value Adjacent_spanset_span Adjacent_spanset_spanset Adjacent_spanset_value Adjacent_value_span Adjacent_value_spanset Contained_set_set Contained_span_span Contained_span_spanset Contained_spanset_span Contained_spanset_spanset Contained_value_set Contained_value_span Contained_value_spanset Contains_set_set Contains_set_value Contains_span_span Contains_span_spanset Contains_span_value Contains_spanset_span Contains_spanset_spanset Contains_spanset_value Overlaps_set_set Overlaps_span_span Overlaps_span_spanset Overlaps_spanset_span Overlaps_spanset_spanset

Contained_span_span() Datum Contained_span_span ( PG_FUNCTION_ARGS  ) Return true if the first span is contained in the second one @sqlfn span_contained() SQL Operator: <@