On 10/22/2014 08:27 PM, olegjobs@mail.ru wrote:
> This function test_ext_get_range(cstring) returns int4range:
>
> Datum test_ext_get_range(PG_FUNCTION_ARGS)
> {
> char *ts = PG_GETARG_CSTRING(0);
>
> return DirectFunctionCall3(range_in, CStringGetDatum(ts),
> ObjectIdGetDatum(3904), Int32GetDatum(0);
> }
> In psql:
> select test_ext_get_range('[1,1]');
> error:
> connection to the server was lost.
>
> it seems to me that some memory problems because of "The range I/O functions
> need a bit more cached info than other range
> * functions, so they store a RangeIOData struct in fn_extra, not just a
> * pointer to a type cache entry. "
Yeah, DirectFunctionCall cannot be used with range_in. Use FunctionCall3
instead. See this comment in fmgr.c, above DirectFunctionCall1Coll:
> /*
> * These are for invocation of a specifically named function with a
> * directly-computed parameter list. Note that neither arguments nor result
> * are allowed to be NULL. Also, the function cannot be one that needs to
> * look at FmgrInfo, since there won't be any.
> */
range_in needs to look at FmgrInfo.
- Heikki
