As far as memory management goes, do I just use hash_create() and assign that pointer to fn_extra and at the end of the query it will be freed? Or will it not be freed until this end of the transaction? I'm really having trouble understanding the memory management issues with Postgres.


Andrew Dunstan wrote:
Greg Mitchell wrote:

Also, are there any ADTs like a hash-map or tree-map in the server
libraries (my background is C++ and am use to having std::map<>) or do I
need to role my  own?

Look at the dynahash code. I just used it for the first time in a plperl patch, and it's reasonably straightforward.



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