Re: longfin and tamandua aren't too happy but I'm not sure why

On Wed, Sep 28, 2022 at 2:59 AM Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> ... also, lapwing's not too happy [1].  The alter_table test
> expects this to yield zero rows, but it doesn't:

By looking at regression diff as shown below, it seems that we are
able to get the relfilenode from the Oid using
pg_relation_filenode(oid) but the reverse mapping
pg_filenode_relation(reltablespace, relfilenode) returned NULL.

I am not sure but by looking at the code it is somehow related to
alignment padding while computing the hash key size in the 32-bit
machine in the function InitializeRelfilenumberMap().  I am still
looking into this and will provide updates on this.

+  oid  | mapped_oid | reltablespace | relfilenode |
 relname
+-------+------------+---------------+-------------+------------------------------------------------
+ 16385 |            |             0 |      100000 | char_tbl
+ 16388 |            |             0 |      100001 | float8_tbl
+ 16391 |            |             0 |      100002 | int2_tbl
+ 16394 |            |             0 |      100003 | int4_tbl


--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com