What - if anything - do I need to do to get this on the commitfest
list for the next commitfest?
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On Wed, Feb 5, 2014 at 10:33 AM, Jon Nelson jnelson+pg...@jamponi.net wrote:
What - if anything - do I need to do to get this on the commitfest
list for the next commitfest?
The list of instructions is here:
http://wiki.postgresql.org/wiki/Submitting_a_Patch#Patch_submission
Then the next commit
What are my next steps here?
I believe the concept is sound, the code is appears to work and
doesn't crash, and the result does show a performance win in most
cases (sometimes a big win). It's also incomplete, at least insofar
as it doesn't interface with the cost models at all, etc...
--
Jon
On 22/01/14 03:16, Jon Nelson wrote:
Greetings -hackers:
I have worked up a patch to PostgreSQL which elides tuples during an
external sort. The primary use case is when sorted input is being used
to feed a DISTINCT operation. The idea is to throw out tuples that
compare as identical whenever
On 22/01/14 03:53, Tom Lane wrote:
Jon Nelson jnelson+pg...@jamponi.net writes:
A rough summary of the patch follows:
- a GUC variable enables or disables this capability
- in nodeAgg.c, eliding duplicate tuples is enabled if the number of
distinct columns is equal to the number of sort
Jeremy Harris j...@wizmail.org writes:
On 22/01/14 03:53, Tom Lane wrote:
Jon Nelson jnelson+pg...@jamponi.net writes:
- in createplan.c, eliding duplicate tuples is enabled if we are
creating a unique plan which involves sorting first
[ raised eyebrow ... ] And what happens if the planner
On Wed, Jan 22, 2014 at 3:26 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Jeremy Harris j...@wizmail.org writes:
On 22/01/14 03:53, Tom Lane wrote:
Jon Nelson jnelson+pg...@jamponi.net writes:
- in createplan.c, eliding duplicate tuples is enabled if we are
creating a unique plan which involves
Greetings -hackers:
I have worked up a patch to PostgreSQL which elides tuples during an
external sort. The primary use case is when sorted input is being used
to feed a DISTINCT operation. The idea is to throw out tuples that
compare as identical whenever it's convenient, predicated on the
Jon Nelson jnelson+pg...@jamponi.net writes:
A rough summary of the patch follows:
- a GUC variable enables or disables this capability
- in nodeAgg.c, eliding duplicate tuples is enabled if the number of
distinct columns is equal to the number of sort columns (and both are
greater than
On Tue, Jan 21, 2014 at 9:53 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Jon Nelson jnelson+pg...@jamponi.net writes:
A rough summary of the patch follows:
- a GUC variable enables or disables this capability
- in nodeAgg.c, eliding duplicate tuples is enabled if the number of
distinct columns
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