"Alexander Priem" <ap@cict.nl> writes:
> Does anyone know whether it is bad practise to have two indexes on the
> primary key of a table? (one 'primary key' index and one partial index)
It's a little unusual, but if you get enough performance boost from it
to justify the maintenance cost of the extra index, then I can't see
anything wrong with it.
The "if" is worth checking though. I missed the start of this thread,
but what percentage of your rows do you expect to have null deleteddate?
Unless it's a pretty small percentage, I'm unconvinced that the extra
indexes will be worth their cost.
regards, tom lane
