granicus.if.org Git - postgresql/commit

author	Alvaro Herrera <alvherre@alvh.no-ip.org>
	Sat, 1 Apr 2017 19:10:04 +0000 (16:10 -0300)
committer	Alvaro Herrera <alvherre@alvh.no-ip.org>
	Sat, 1 Apr 2017 19:10:04 +0000 (16:10 -0300)
commit	c655899ba9ae2a0d24e99c797167c33e0cfa0820
tree	5493791074d6624cf5ce44313a870846d4563f97	tree \| snapshot
parent	3a82129a40a3a2987356d4051e017fd456876c8d	commit \| diff

BRIN de-summarization

When the BRIN summary tuple for a page range becomes too "wide" for the
values actually stored in the table (because the tuples that were
present originally are no longer present due to updates or deletes), it
can be useful to remove the outdated summary tuple, so that a future
summarization can install a tighter summary.

This commit introduces a SQL-callable interface to do so.

Author: Álvaro Herrera
Reviewed-by: Eiji Seki
Discussion: https://postgr.es/m/20170228045643.n2ri74ara4fhhfxf@alvherre.pgsql

doc/src/sgml/brin.sgml		diff \| blob \| history
doc/src/sgml/func.sgml		diff \| blob \| history
src/backend/access/brin/brin.c		diff \| blob \| history
src/backend/access/brin/brin_revmap.c		diff \| blob \| history
src/backend/access/brin/brin_xlog.c		diff \| blob \| history
src/backend/access/rmgrdesc/brindesc.c		diff \| blob \| history
src/include/access/brin_revmap.h		diff \| blob \| history
src/include/access/brin_xlog.h		diff \| blob \| history
src/include/catalog/catversion.h		diff \| blob \| history
src/include/catalog/pg_proc.h		diff \| blob \| history
src/test/regress/expected/brin.out		diff \| blob \| history
src/test/regress/sql/brin.sql		diff \| blob \| history