Martijn van Oosterhout <kleptog@xxxxxxxxx> writes: > On Mon, Dec 12, 2005 at 08:43:52AM -0600, Tony Caduto wrote: >> Is there any special C headers (for creating functions that return >> results?) that are PG specific that would need to be ported to Pascal? > Well, I don't know about any special C headers. The examples in the > documentation tell you what you need for various features. However, I > think the most important header would be fmgr.h since that is how the C > functions get arguments from and return data to the server. With a few > declarations for things like palloc you should be able to do most > things. It'd depend hugely on what you want to accomplish. For a self-contained computational function that you don't mind using "version 0" call convention for, you might not need any headers at all, just write the thing as a regular cdecl function. The next steps up would be access to palloc (so you could return pass-by-reference datatypes), elog (for error reporting), and fmgr.h (so you could use version-1 call convention, which is more portable than version-0 and can deal with NULLs). If you wanted to do stuff that involved poking into the backend's internal data structures, I think by far the path of least resistance is to forget Pascal and use C ... tom "hacked Pascal in the '70s" lane
