Jorge Arevalo <jorgearevalo(at)gis4free(dot)org> writes:
> Yes. For example, the function expects 2 arguments, and it's called
> with 2 arguments: 1 composite type (following this format
> https://svn.osgeo.org/postgis/spike/wktraster/doc/RFC1-SerializedFormat)
> and one integer. But PG_NARGS() returns a really big value (16297)
> when I first check the number of arguments at the beginning of the
> function. Has sense?
Given only that data point, I would guess that you forgot to mark the
function as being called with V1 protocol (PG_FUNCTION_INFO_V1).
regards, tom lane