Heikki Linnakangas wrote: >> How can the executor "see through" a plpgsql function definition? Or do >> you mean that this reduction is being done at execution time? (hmm ... >> this is what a one-time filter is, now that I think about it?) > > Note that the function is immutable, and the argument in the query is a > constant. The planner simply runs the function and replaces the function > call with the result.
The planner runs the function? Ok, neat -- I didn't know it did that. (In my question above I meant "how can the _planner_ see through the definition"; I was thinking that the planner had no way to run the function). -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs
