2014-06-04 9:36 GMT+02:00 Thomas Mueller muel...@adobe.com:
Hi,
QueryIndex.getCost: this is actually quite well documented (see the
Javadocs). But the implementations might not fully follow the contract :-)
this is probably just my opinion but the contract is not much clear; to me
finding
On 18/06/2014 10:26, Tommaso Teofili wrote:
it would be ok for me to either deprecate it or improve the semantics
of the cost calculation (e.g. explicitly introduce other metrics to be
taken into account in the cost calculation: local / remote index,
With the IndexPlan.isDelayed() we instruct
Hi,
QueryIndex.getCost
my doubt is what
this heuristic function to estimate the traversed entries should look
like in general
Relational databases typically know the number of entries in the index
(total indexed entries), plus the selectivity of a column. See also
Hi,
On Wed, Jun 18, 2014 at 4:26 AM, Tommaso Teofili
tommaso.teof...@gmail.com wrote:
should we just return the number of estimated entries for the cost?
Yes, that's what I think the contract should be.
My other concern on this point is that it's not granted, in my opinion,
that the index
Hi,
On Wed, Jun 18, 2014 at 7:44 AM, Thomas Mueller muel...@adobe.com wrote:
My other concern on this point is that it's not granted, in my opinion,
that the index returning less entries would be the faster.
Yes, it's not that much about less entries or more entries, it's about
lower or higher
ok, thanks Davide for the pointers.
Regards,
Tommaso
2014-06-18 13:36 GMT+02:00 Davide Giannella giannella.dav...@gmail.com:
On 18/06/2014 10:26, Tommaso Teofili wrote:
it would be ok for me to either deprecate it or improve the semantics
of the cost calculation (e.g. explicitly introduce
Hi,
2014-06-18 13:44 GMT+02:00 Thomas Mueller muel...@adobe.com:
Hi,
QueryIndex.getCost
my doubt is what
this heuristic function to estimate the traversed entries should look
like in general
Relational databases typically know the number of entries in the index
(total indexed entries),
Hi,
2014-06-18 16:02 GMT+02:00 Jukka Zitting jukka.zitt...@gmail.com:
Hi,
On Wed, Jun 18, 2014 at 4:26 AM, Tommaso Teofili
tommaso.teof...@gmail.com wrote:
should we just return the number of estimated entries for the cost?
Yes, that's what I think the contract should be.
ok, that's
Hi,
On Wed, Jun 18, 2014 at 11:31 AM, Tommaso Teofili
tommaso.teof...@gmail.com wrote:
2014-06-18 16:02 GMT+02:00 Jukka Zitting jukka.zitt...@gmail.com:
On Wed, Jun 18, 2014 at 4:26 AM, Tommaso Teofili
tommaso.teof...@gmail.com wrote:
should we just return the number of estimated entries for
