Thanks David, Lateral did the trick:
CREATE VIEW with_keywords AS SELECT x,y,z, keywords.a, keywords.b, keywords.c FROM large_table l, LATERAL extract_keywords(l.*) keywords(a,b,c) Regards, Daniel On Wed, Aug 31, 2016 at 6:46 AM, David G. Johnston < david.g.johns...@gmail.com> wrote: > On Tue, Aug 30, 2016 at 4:15 PM, Daniel Caldeweyher <dca...@gmail.com> > wrote: > >> >> select x,y,z, (extract_keywords(l.*)).* >> >> [...] > > >> Does this mean the function gets called three time? >> > > Yes. > > > (function_call(...)).* > > syntax is problematic. You should avoid it via one of two options. > > LATERAL (new way, preferred) > or > CTE (old way) > > In the CTE version you make the call in the CTE but do "(col).*" in the > main query. This way the function is only called once to generate a > composite output, then the composite output is exploded. > > With LATERAL the system is smart enough to do it the right way. > > David J. >
