Re: Using threads in FDW for read-ahead

I've done this, but I had to resort to using middleware outside of the FWD.


On Tue, Jun 10, 2014 at 12:10 PM, Noah Watkins <[email protected]>
wrote:

> I have created a FDW for a storage backend and it is working well, and now
> I would like to overlap processing with I/O by performing read-ahead. I
> started by using a thread to do background I/O and this worked, but
> problems started to arise when I tried to do predicate filtering in the
> thread.
>
> In particular, it seems as though `check_stack_depth` is built to assume a
> single threaded environment (`stack_base_ptr` is global).
>
> I'm wondering if there is a solution to this problem, or if there are
> examples of overlapping tuple I/O and predicate filtering using
> non-multithreading techniques?
>
> Thanks,
> Noah
>