Re: Initializing Datums for use with SPI_execute_plan

On Tue, Sep 19, 2006 at 04:00:43PM -0400, Jack Orenstein wrote:
> Can you provide some guidance (or point to some documentation) on how
> to manage memory? Is the idea that I should (must?) not pfree
> palloc'ed memory from Int64GetDatum, but I should free anything I
> allocate myself using palloc? Or not even that?

If you want the gory details, check out the mmgr README file.

http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/mmgr/README?rev=1.9

However, except in fairly special circumstances (eg. index comparison
functions) you don't ever need to bother with pfree(). The memory will
all be freed at the right time.

The documentation on C functions and set-returning functions also has
info about when the context is reset.

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.