Ever and always relationships

eContains({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
aContains({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
eCovers({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
aCovers({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
eDisjoint({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
aDisjoint({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
eDwithin({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer},float) → boolean
aDwithin({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer},float) → boolean
eIntersects({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
aIntersects({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
eTouches({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean
aTouches({geometry,cbuffer,tcbuffer},{geometry,cbuffer,tcbuffer}) → boolean

The ever and always relationships determine whether the topological or distance relationship is ever or always satisfied (see the section called “Ever and Always Comparisons”) and return a boolean

SELECT eContains(geometry 'Polygon((0 0,0 50,50 50,50 0,0 0))',
  tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01, Cbuffer(Point(1 1), 0.3)@2001-01-03)');
-- false
SELECT eDisjoint(cbuffer 'Cbuffer(Point(2 2), 0.0)',
  tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01, Cbuffer(Point(1 1), 0.3)@2001-01-03)');
-- true
SELECT eIntersects(tcbuffer '[Cbuffer(Point(1 1), 0.1)@2001-01-01,
  Cbuffer(Point(1 1), 0.3)@2001-01-03)',
  tcbuffer '[Cbuffer(Point(2 2), 0.0)@2001-01-01, Cbuffer(Point(2 2), 1)@2001-01-03)');
-- false