| From: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
|---|---|
| To: | Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, Rajkumar Raghuwanshi <rajkumar(dot)raghuwanshi(at)enterprisedb(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Beena Emerson <memissemerson(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] path toward faster partition pruning |
| Date: | 2018-01-10 01:55:28 |
| Message-ID: | CAKJS1f9+dHias8tPX2JxmY4o3amto3uVeyHNc77i+EGYG8+1Cg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 9 January 2018 at 21:40, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> Sorry about the absence in the last few days. I will post a new version
> addressing various review comments by the end of this week.
One more thing I discovered while troubleshooting a bug Beena reported
in the run-time partition pruning patch is that
classify_partition_bounding_keys properly does;
if (EXPR_MATCHES_PARTKEY(leftop, partattno, partexpr))
constexpr = rightop;
else if (EXPR_MATCHES_PARTKEY(rightop, partattno, partexpr))
constexpr = leftop;
else
/* Clause not meant for this column. */
continue;
for OpExpr clauses, but does not do the same for leftop for the
ScalarArrayOpExpr test.
--
David Rowley http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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