On Thu, Oct 06, 2005 at 09:06:59AM -0500, smile khmer wrote: > Dear all, > > Does anyone know how index searching work in PG. I've explored the > source code of PG, for btree, for searching, it will call the > functions in file btcompare.c. As I've made a printf in the functions > of the file btcompare.c. When I compile and run PG, it get into > loop,..... the messages are printed and printed .....
Not a loop -- the function may just be called a lot of times. > I want to know how the function called happen in Postgres, > it seems that it doesn't call the function directly ! The code gets function pointers through the catalogs, so they will be called even if you don't see a direct function call. At some time the code will ask for the equality function for such-and-such datatype, then call it. -- Alvaro Herrera http://www.amazon.com/gp/registry/CTMLCN8V17R4 "Acepta los honores y aplausos y perderás tu libertad" ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
