Tom Lane wrote:
"Florian G. Pflug" <fgp@xxxxxxxx> writes:
Using perl, and a perl-hash was even slower, so I wrote my to c-functions
(actualy c++), which use a STL hash_set to filter out duplicates.
This makes me fairly nervous, because what's going to ensure that the
memory used by the hash_set is reclaimed? Particularly if the query
errors out partway through?
hash_set can be told to use a user-defined allocator class, which in turn
can use palloc/pfree, with an appropriate memory context. I'm not
really sure what the "appropriate context" is, as using CurrentMemoryContext
leads to strange crashes. For now, i'm using the standard c++ allocator,
because I figured it should make debugging easier.
Still, the question remains how I can sanely use a c++ object as "state" of
a aggregate...
greetings, Florian Pflug
