On Wednesday 26 Mar 2003 10:30 pm, Dennis Gearon wrote:
> If I have a before trigger on table 'A' modify table 'B' and an after
> trigger on table 'A' fails for that transaction:
All triggers take place within a single transaction.
> 1/ Is the change to table 'B' visible to anybody except that tranaction at
> any time?
Shouldn't be. It will never be committed.
> 2/ Does the change to table 'B' disappear/never show up when the after
> trigger fails?
Yes.
> 3/ Would all after triggers in that transaction see the change to table 'B'
> before the one particular after trigger fails?
Should do - they're in the same transaction. See chapter 9.2 of the user guide
"Transaction Isolation" for details
> 4/ do all the major DB's have this functionality? I.E.
>
> Oracle
> Sybase
> MSSQL (yuck)
> DB2
> <other examples welcome>
Sorry, can't comment. All should offer similar functionality, but whether the
behaviour is identical I wouldn't want to say without testing.
--
Richard Huxton
