On Sun, Sep 6, 2015 at 9:35 PM, Thomas Munro
wrote:
> Running various contrived aggregate queries on a large low cardinality
> dataset in a small range (therefore frequently the same weight & size), I
> managed to measure a small improvement of up to a few percent
On Sat, Jul 11, 2015 at 10:05 AM, Peter Geoghegan wrote:
> Currently, there are certain aggregates that sort some tuples before
> making a second pass over their memtuples array (through the tuplesort
> "gettuple" interface), calling one or more attribute equality operator
>
Currently, there are certain aggregates that sort some tuples before
making a second pass over their memtuples array (through the tuplesort
gettuple interface), calling one or more attribute equality operator
functions as they go. For example, this occurs during the execution of
the following