Re: WAL, xl_heap_insert and tuple oid mystry

Hi,

>>  Where is the OID of tuple stored in a WAL record of a
>>  tuple? If not with xl_heap_header, where is it stored? Is it
>>  stored at all?
   > It's stored in the "tuple data" portion. 

Is the OID also recorded with xl_heap_delete record as well or just the xl_heaptid? From my reading of the code it is
notrecorded. 
 

In general, why is OID of a tuple relegated as just another tuple data, when it can replace xl_heaptid as a much more
stabletuple identifier. I understand that by recording tuples in terms of xl_heaptid (i.e., page/offset) means that the
dbcan recover quickly but isn't there some value to storing a much "higher level" information in the WAL logs? For
example,tuple manipulations, if recorded in terms of manipulation on tuple oids, can support applications such as
these:

http://blogs.enterprisedb.com/2011/03/03/more-musings-on-logical-replication/

Just a thought.

Thanks,
Jagan