Hi everyone, I found this several days ago when I try to debug a "fetch" of cursor. And I have sent a mail to this list, but no one reply... Maybe this is a very simple problem, please help me, thanks a lot...
Here is the example: create table t (a int); insert into t values (1),(3),(5),(7),(9); insert into t select a+1 from t; begin; declare c cursor for select * from t order by a; fetch 3 in c; fetch 3 in c; fetch 3 in c; In 'PortalRun', a fetch stmt will be treated with PORTAL_UTIL_SELECT, and then a tuplestore will be created in 'FillPortalStore' in the fetch stmt's portal. In 'FillPortalStore', all result will be store at that tuplestore, Then, go back to 'PortalRun'; next, 'PortalRunSelect' will send this results to client... My problem is: why do we need create that tuplestore as an middle storeage? why do not we just send these result to clent at the first time? Thank you very much. -- GaoZengqi pgf...@gmail.com zengqi...@gmail.com