Re: default_transaction_isolation = serializable causes crash under Hot Standby

> "Kevin Grittner"  wrote:
> Tom Lane  wrote:
> 
>> Yeah, it would definitely be nicer if BEGIN; SET TRANSACTION LEVEL
>> would work too. Maybe the place to put the check is where we
>> establish the transaction snapshot.
> 
> That makes sense, 
 
> I'll take a shot at it sometime today,
 
Attached.  With a default setting in postgresql.conf it handles
Robert's test case nicely, and does what Tom asks for above:

test=# set default_transaction_isolation = 'serializable';
SET
test=# begin;
BEGIN
test=# select 1;
ERROR:  can not create a serializable snapshot during recovery
test=# rollback;
ROLLBACK
test=# begin;
BEGIN
test=# set transaction isolation level repeatable read;
SET
test=# select 1;
 ?column? 
----------
        1
(1 row)

test=# commit;
COMMIT

But if you set it in the postgresql.conf file, it's not pretty:
 
kevin@kevin-desktop:~$ psql -p 5433 test
psql: FATAL:  can not create a serializable snapshot during recovery
 
Ideas?
 
-Kevin