Re: [HACKERS] GIN pageinspect functions

On Mon, Aug 10, 2015 at 09:14:48AM -0700, Jeff Janes wrote:
> When I call gin_leafpage_items on a {leaf} page, I get the ERROR:
>
> ERROR:  input page is not a compressed GIN data leaf page
> DETAIL:  Flags 0002, expected 0083
>
> I'm don't know why it won't work on an uncompressed leaf page (or for that
> matter, why my index pages are not compressed), but the docs should probably
> note the restriction.

Yes, this patch is from nine years ago, but it is still an improvement,
and the GIN page still must be compressed, so patch applied to master:

opaq = GinPageGetOpaque(page);
if (opaq->flags != (GIN_DATA | GIN_LEAF | GIN_COMPRESSED))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("input page is not a compressed GIN data leaf page"),
errdetail("Flags %04X, expected %04X",
opaq->flags,
(GIN_DATA | GIN_LEAF | GIN_COMPRESSED))));

--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com

Only you can decide what is important to you.