On 1999-11-25, Vovk G. Grigoriy mentioned:
> Can any tell my, what will fastly - "SELECT ..." statement or function
> doing "SELECT..."?
I am not sure, but it would seem that a function doing SELECT will do just
that: call SELECT. The only difference you would have is the function call
overhead. I'm not sure though to what extent the SQL in the function is
preparsed, but in general I never have seen this mentioned as a
performance-tuning measure.
> I do query whith storage procedure in MS SQL, and what about postgresql?
We have user-defined functions, which cover some areas of stored
procedures, but not others. For example, functions can not return a set of
tuples. There are "stored procedure" threads all the time on these mailing
lists -- you are encouraged to look through them for the detailed answers.
Also, some of those things are being worked on for 7.0.
--
Peter Eisentraut Sernanders väg 10:115
peter_e@gmx.net 75262 Uppsala
http://yi.org/peter-e/ Sweden