Traditional comparisons

tcell {=, <>, <, >, <=, >=} tcell → boolean

SELECT th3index '831c02fffffffff@2001-01-01' = th3index '831c02fffffffff@2001-01-01';
-- t
SELECT tquadbin '48a6227affffffff@2001-01-01' < tquadbin '485623ffffffffff@2001-01-01';
-- f
SELECT ts2cell '47c3c@2001-01-01' = ts2cell '47c3c@2001-01-01';
-- t

Ever and always comparisons

{cell,tcell} {?=, ?<>, %=, %<>} {cell,tcell} → boolean

The probe operand may be a bare cell identifier or another tcell trajectory, in either operand position. The e-prefixed forms hold when the relationship holds at at least one instant, the a-prefixed forms when it holds across the entire time span.

SELECT th3index '[831c02fffffffff@2001-01-01,
  880326b885fffff@2001-01-05]' ?= h3index '880326b885fffff';
-- t
SELECT tquadbin '[48a6227affffffff@2001-01-01,
  485623ffffffffff@2001-01-05]' %= quadbin '485623ffffffffff';
-- f
SELECT ts2cell '47c3c@2001-01-01' ?= s2cell '47c3c';
-- t

Temporal comparisons

{cell,tcell} {#=, #<>} {cell,tcell} → tbool

Return a temporal boolean giving the per-instant equality, or inequality, between a temporal cell and a probe

SELECT th3index '831c02fffffffff@2001-01-01' #= h3index '831c02fffffffff';
-- t@2001-01-01
SELECT tquadbin '48a6227affffffff@2001-01-01' #<> quadbin '485623ffffffffff';
-- t@2001-01-01
SELECT ts2cell '47c3c@2001-01-01' #= s2cell '47c3c';
-- t@2001-01-01