Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Tom Lane wrote:
>> Well, that's just a matter of choosing good (ie short) names for the
>> backslash commands. I was trying to be clear rather than proposing
>> names I would actually want to use ;-). Any suggestions?
> Well, if we allowed ON_ERROR_ROLLBACK to work in non-interactive
> sessions we could just do:
> \set ON_ERROR_ROLLBACK on
> DROP TABLE foo;
> \set ON_ERROR_ROLLBACK off
That isn't the same thing at all. The syntax I was proposing allows the
script writer to define a savepoint covering multiple statements,
whereas the above does not.
Maybe what we really need is a "rollback or release savepoint"
operation, defined as "ROLLBACK TO foo if in error state, RELEASE foo
if not in error state". This is essentially the thing that a script
writer has to have and can't do for himself due to the lack of any
conditional ability in psql scripts. We could imagine implementing
that either as a SQL command or as a psql backslash command ... I don't
have a strong feeling either way.
regards, tom lane
