From: | Heikki Linnakangas <heikki(dot)linnakangas(at)iki(dot)fi> |
---|---|
To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql: Add cost estimation of range @> and <@ operators. |
Date: | 2013-03-14 13:37:25 |
Message-ID: | E1UG8LV-0002JQ-6E@gemulon.postgresql.org |
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Thread: | |
Lists: | pgsql-committers |
Add cost estimation of range @> and <@ operators.
The estimates are based on the existing lower bound histogram, and a new
histogram of range lengths.
Bump catversion, because the range length histogram now needs to be present
in statistic slot kind 6, or you get an error on @> and <@ queries. (A
re-ANALYZE would be enough to fix that, though)
Alexander Korotkov, with some refactoring by me.
Branch
------
master
Details
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http://git.postgresql.org/pg/commitdiff/59d0bf9dca58b237902c2fd1507e8bc5d54d4a63
Modified Files
--------------
src/backend/utils/adt/rangetypes_selfuncs.c | 541 ++++++++++++++++++++++++-
src/backend/utils/adt/rangetypes_typanalyze.c | 125 ++++++-
src/include/catalog/catversion.h | 2 +-
src/include/catalog/pg_operator.h | 1 +
src/include/catalog/pg_statistic.h | 12 +-
5 files changed, 667 insertions(+), 14 deletions(-)
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