[GENERAL] Which meta table contain the functions

Group, I can get the function list via \df. Can someone tell me which meta table contain the function list? Thanks! Alfred ---(end of broadcast)--- TIP 2: Don't 'kill -9' the postmaster

[GENERAL] Rule vs Trigger

Suppose I want to update a statistics table S after an insertion into an activity table A. In order to update S automatically, I can either create a rule on A or create an after trigger on A. What's the performance implication on using rule vs trigger? Thanks in advance. Alfred ---