Agregar un instante temporal o una secuencia temporal

appendInstant(tcbuffer,tcbufferInst) → tcbuffer
appendSequence(tcbuffer,tcbufferSeq) → tcbuffer

SELECT asText(appendInstant(tcbuffer 'Cbuffer(Point(1 1), 0.1)@2001-01-01',
  'Cbuffer(Point(2 2), 0.2)@2001-01-02'));
-- [Cbuffer(POINT(1 1),0.1)@2001-01-01, Cbuffer(POINT(2 2),0.2)@2001-01-02]
SELECT asText(appendSequence(tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01]',
  '[Cbuffer(Point(2 2), 0.2)@2001-01-02]'));
-- {[Cbuffer(POINT(1 1),0.1)@2001-01-01], [Cbuffer(POINT(2 2),0.2)@2001-01-02]}

Fusionar los búferes circulares temporales

merge(tcbuffer,tcbuffer) → tcbuffer
merge(tcbuffer[]) → tcbuffer
mergeAgg(tcbuffer) → tcbuffer

SELECT asText(merge(tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01, Cbuffer(Point(1 1),
  0.3)@2001-01-03]',
  '[Cbuffer(Point(1 1), 0.3)@2001-01-03, Cbuffer(Point(1 1), 0.5)@2001-01-05]'));
-- [Cbuffer(POINT(1 1),0.1)@2001-01-01, Cbuffer(POINT(1 1),0.5)@2001-01-05]
SELECT asText(merge(ARRAY[tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01,
  Cbuffer(Point(1 1), 0.2)@2001-01-02]',
  '[Cbuffer(Point(1 1), 0.2)@2001-01-02, Cbuffer(Point(1 1), 0.3)@2001-01-03]']));
-- [Cbuffer(POINT(1 1),0.1)@2001-01-01, Cbuffer(POINT(1 1),0.3)@2001-01-03]
WITH temp(inst) AS (
  SELECT tcbuffer 'Cbuffer(Point(1 1), 0.1)@2001-01-01' UNION
  SELECT tcbuffer 'Cbuffer(Point(2 2), 0.2)@2001-01-02' )
SELECT asText(mergeAgg(inst)) FROM temp;
-- {Cbuffer(POINT(1 1),0.1)@2001-01-01, Cbuffer(POINT(2 2),0.2)@2001-01-02}