Return the temporal parent cell at the given resolution

cellToParent(cell,integer) → cell
cellToParent(tcell,integer) → tcell
cellToParent(tcell) → tcell

Return the ancestor of a cell at the given coarser resolution. The static form takes a single cell; the temporal form returns the ancestor of each cell in a trajectory. The no-argument form drops to the next-coarser resolution.

SELECT cellToParent(h3index '8a2a1072b59ffff', 5);
-- 852a1073fffffff
SELECT getResolution(cellToParent(th3index '8a2a1072b59ffff@2001-01-01', 5));
-- 5@2001-01-01
SELECT getResolution(cellToParent(tquadbin
  '48a6227affffffff@2001-01-01', 5));
-- 5@2001-01-01
SELECT getResolution(cellToParent(ts2cell '47c3c@2001-01-01', 5));
-- 5@2001-01-01