Re: plpgsql versus domains

Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> writes:
> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> Tom> This is the first attempt at weaponizing the memory context
> Tom> reset/delete feature, and I'm fairly happy with it, except for one
> Tom> thing: I had to #include utils/memnodes.h into typcache.h in order
> Tom> to preserve the intended property that the callback structs could
> Tom> be included directly into structs using them. Now, that's not
> Tom> awful in itself, because typcache.h isn't used everywhere; but if
> Tom> this feature gets popular we'll find memnodes.h being included
> Tom> pretty much everywhere, which is not so great. I'm thinking about
> Tom> moving struct MemoryContextCallback and the extern for
> Tom> MemoryContextRegisterResetCallback into palloc.h to avoid this.
> Tom> Maybe that's too far in the other direction. Thoughts?
> Tom> Compromise ideas?

> This was pretty much my first thought on looking at the callback
> patch. It may seem logical to put the reset callback stuff in
> memutils/memnodes alongside context creation and reset and so on, but in
> fact the places that are going to want to use callbacks are primarily
> _not_ the places that are doing their own context management - since
> those could do their own cleanup - but rather places that are allocating
> things in contexts supplied by others. So palloc.h is the place for it.

That argument sounds good to me ;-). Moved.

regards, tom lane