I have the created a C-Language function (code is below). Now, I wonder: How do I handle exceptions, for example if malloc cannot assign the necessary memory? Do "palloc" and "pfree" handle such a case cleanly?
Yes -- they will roll back the current transaction on if there is no memory available. You can catch the error via PG_TRY() in 8.0, although in the case of OOM there isn't probably a lot your exception handler could do...
-Neil
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