adjacent2D Bigintspan_spgist_config contain2D Datespan_spgist_config distance_span_nodespan Floatspan_spgist_config getQuadrant2D Intspan_spgist_config left2D overlap2D overLeft2D overRight2D right2D Set_spgist_compress SortedSpan Span_kdtree_choose Span_kdtree_inner_consistent Span_kdtree_picksplit span_level_cmp span_lower_qsort_cmp Span_quadtree_choose Span_quadtree_inner_consistent Span_quadtree_picksplit span_spgist_get_span Span_spgist_inner_consistent Span_spgist_leaf_consistent span_upper_qsort_cmp spannode_copy spannode_init spannode_kdtree_next spannode_quadtree_next Spanset_spgist_compress Tstzspan_spgist_config

Span_quadtree_picksplit() Datum Span_quadtree_picksplit ( PG_FUNCTION_ARGS  ) SP-GiST pick-split function for span types. It splits a list of span types into quadrants by choosing a central 4D point as the median of the coordinates of the span types.