| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> |
| Cc: | Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tatsuo Ishii <ishii(at)postgresql(dot)org>, David Steele <david(at)pgmasters(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Petr Jelinek <petr(at)2ndquadrant(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: multivariate statistics (v19) |
| Date: | 2017-01-30 16:55:55 |
| Message-ID: | 20170130165555.5h2hyncs5l2ldrhx@alvherre.pgsql |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Minor nitpicks:
Let me suggest to use get_attnum() in CreateStatistics instead of
SearchSysCacheAttName for each column. Also, we use type AttrNumber for
attribute numbers rather than int16. Finally in the same function you
have an erroneous ERRCODE_UNDEFINED_COLUMN which should be
ERRCODE_DUPLICATE_COLUMN in the loop that searches for duplicates.
May I suggest that compare_int16 be named attnum_cmp (just to be
consistent with other qsort comparators) and look like
return *((const AttrNumber *) a) - *((const AttrNumber *) b);
instead of memcmp?
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Daniel Verite | 2017-01-30 16:57:30 | Re: \if, \elseif, \else, \endif (was Re: PSQL commands: \quit_if, \quit_unless) |
| Previous Message | Robert Haas | 2017-01-30 16:32:36 | Re: privileges for changing schema owner |