Jeff Janes writes:
> On Fri, Jun 9, 2017 at 9:06 AM, Tom Lane wrote:
>> The issue is how to initialize the state value to begin with.
> Why does it need to be initialized? initializing a NULL state upon first
> use is already the job of sfunc.
Right, but for partial aggregation the combinefunc
On Fri, Jun 9, 2017 at 9:06 AM, Tom Lane wrote:
> Jeff Janes writes:
> > The docs for creating aggregates for 9.6 and beyond say:
> > "For aggregate functions whose state_data_type is internal, the
> combinefunc
> > must not be strict. In this case the combinefunc must ensure that null
> > state
Jeff Janes writes:
> The docs for creating aggregates for 9.6 and beyond say:
> "For aggregate functions whose state_data_type is internal, the combinefunc
> must not be strict. In this case the combinefunc must ensure that null
> states are handled correctly and that the state being returned is p
The docs for creating aggregates for 9.6 and beyond say:
"For aggregate functions whose state_data_type is internal, the combinefunc
must not be strict. In this case the combinefunc must ensure that null
states are handled correctly and that the state being returned is properly
stored in the aggre
