TODO Restrict to (the complement of) a set of values

atValues(tcbuffer,values) → tcbuffer

minusValues(tcbuffer,values) → tcbuffer

SELECT asText(atValues(tcbuffer '[Cbuffer(Point(2 2), 0.3)@2001-01-01, 
  Cbuffer(Point(2 2), 0.7)@2001-01-03]', cbuffer 'Cbuffer(Point(2 2), 0.5)'));
-- {[Cbuffer(Point(2 2),0.5)@2001-01-02]}
SELECT asText(minusValues(tcbuffer '[Cbuffer(Point(2 2), 0.3)@2001-01-01, 
  Cbuffer(Point(2 2), 0.7)@2001-01-03]', cbuffer 'Cbuffer(Point(2 2), 0.5)'));
/* {[Cbuffer(Point(2 2),0.3)@2001-01-01, Cbuffer(Point(2 2),0.5)@2001-01-02),
   (Cbuffer(Point(2 2),0.5)@2001-01-02, Cbuffer(Point(2 2),0.7)@2001-01-03]} */

TODO Restrict to (the complement of) a geometry

atGeometry(tcbuffer,geometry) → tcbuffer

minusGeometry(tcbuffer,geometry) → tcbuffer

SELECT asText(atGeometry(tcbuffer '[Cbuffer(Point(2 2), 0.3)@2001-01-01, 
  Cbuffer(Point(2 2), 0.7)@2001-01-03]', 'Polygon((0 0,0 2,2 2,2 0,0 0))'));
-- {[Cbuffer(POINT(2 2),0.3)@2001-01-01, Cbuffer(POINT(2 2),0.7)@2001-01-03]}
SELECT asText(minusGeometry(tcbuffer '[Cbuffer(Point(2 2), 0.3)@2001-01-01, 
  Cbuffer(Point(2 2), 0.7)@2001-01-03]', 'Polygon((0 0,0 2,2 2,2 0,0 0))'));
/* {(Cbuffer(Point(2 2),0.342593)@2001-01-01 05:06:40.364673+01,
   Cbuffer(Point(2 2),0.7)@2001-01-03 00:00:00+01]} */