interval_cmp_lower interval_cmp_upper non_negative PLACE_LEFT PLACE_RIGHT tbox_adjust tbox_gist_consider_split tbox_gist_consistent_internal tbox_gist_distance tbox_gist_fallback_split tbox_gist_penalty tbox_gist_picksplit tbox_gist_same tbox_gist_union tbox_index_consistent_leaf tbox_penalty tbox_size tbox_union_rt tnumber_gist_compress tnumber_gist_consistent tnumber_gist_decompress tnumber_index_get_tbox

tbox_gist_distance() Datum tbox_gist_distance ( PG_FUNCTION_ARGS  ) GiST support function. Take in a query and an entry and return the "distance" between them.