On Mon, 2 Feb 2004, Jan Wieck wrote:
Stephan Szabo wrote:
> On Sat, 31 Jan 2004, Tom Lane wrote:
> >> Stephan Szabo <[EMAIL PROTECTED]> writes:
>> > On Mon, 26 Jan 2004, Enio Schutt Junior wrote:
>> >> In a database I am working, I sometimes have to delete all the records in
>> >> some tables. According to the referential integrity defined in the creation
>> >> of the tables, postmaster should not delete the records, but it does. I have
>> >> used the following commands: "delete from table_1" and "truncate table_1".
>> >> ...
>> >> can the postgres user delete records despite referential integrity?
>>
>> I think the first PG release or two that had TRUNCATE TABLE would allow
>> you to apply it despite the existence of foreign-key constraints on the
>> table. Recent releases won't though.
> > Yeah, truncate didn't worry me much, but the implication that delete from
> table_1; worked did.
TRUNCATE cannot be used inside of a transaction, and since 7.3 it checks for foreign keys. So I guess Enio is getting but ignoring the error message when trying the delete, but then the truncate does the job in his pre-7.3 database.
Yes it can. I think it was starting in 7.3.
Okay, so you're the third one correcting me on this. Now can any of you violate a foreign key constraint with anything else than using truncate in a pre-7.3 database? Because I can't do that and that was the original problem.
Jan
=> select * from test2; info ------------- abc'123 123 (2 rows)
=> begin; BEGIN => truncate test2; TRUNCATE TABLE => rollback; ROLLBACK => select * from test2; info ------------- abc'123 123
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