Re: transaction_isolation vs. default_transaction_isolation - Mailing list pgsql-hackers

On Mon, 2009-10-12 at 22:13 -0700, Josh Berkus wrote:
> However, for *two* settings, and two settings only, we distinguish that
> by naming an identical setting "default_*" in postgresql.conf.  This is
> confusing and inconsistent with the rest of the GUCS.  Namely:
> 
> default_transaction_isolation
> default_transaction_read_only

I think they are named "default_" because whatever you specify at the
beginning of a transaction overrides the GUC.

For example, in: BEGIN TRANSACTION ISOLATION LEVEL READ COMMITTED; SET default_transaction_isolation=serializable; ...

the "default_" makes it more clear which setting overrides the other.

Regards,Jeff Davis