Re: pg_upgrade: convert on read is dead end

Zdenek Kotala wrote:
> I expect that function cannot get toast pointer. It can get only 
> detoasted attributes. Correct me if I'm wrong.

A function is passed a raw datum, which can be toasted. Now, practically 
all functions call one of the PG_GETARG_* macros that detoast the datum 
before doing anything else, but there is also PG_GETARG_RAW_VARLENA_P 
macro that returns the toast pointer. Although, grepping through the 
source code suggests that it's not actually used anywhere.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com