RE: A reloption for partitioned tables - parallel_workers

> hi,
>
> Here we go, my first patch... solves
> https://www.postgresql.org/message-id/7d6fdc20-857c-4cbe-ae2e-c0ff9520
> ed55@www.fastmail.com
>

Hi,

partitioned_table_reloptions(Datum reloptions, bool validate)
 {
+    static const relopt_parse_elt tab[] = {
+        {"parallel_workers", RELOPT_TYPE_INT,
+        offsetof(StdRdOptions, parallel_workers)},
+    };
+
     return (bytea *) build_reloptions(reloptions, validate,
                                       RELOPT_KIND_PARTITIONED,
-                                      0, NULL, 0);
+                                      sizeof(StdRdOptions),
+                                      tab, lengthof(tab));
 }

I noticed that you plan to store the parallel_workers in the same struct(StdRdOptions) as normal heap relation.
It seems better to store it in a separate struct.

And as commit 1bbd608 said:
----
> Splitting things has the advantage to
> make the information stored in rd_options include only the necessary
> information, reducing the amount of memory used for a relcache entry
> with partitioned tables if new reloptions are introduced at this level.
----

What do you think?

Best regards,
Houzj