[postgis-users] Math Operators

[Bob Pawley]

I have an expression such as :-

select (st_translate(graphics.utilities_dgm.the_geom, 
  st_x(p_id.p_id.ithe_geom) +
  (ST_distance(p_id.p_id.the_geom, p_id.p_id.ithe_geom)

I need the option of either (+) or (-) after st_x(p_id.p_id.ithe_geom), depending on circumstance. 

At the moment I am writting two expressions. Is there a way of creating one expression that covers both circumstances?

Bob

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