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postgresql/src
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Peter Geoghegan 624686abcf Adjust "root of to-be-deleted subtree" function. 
Restructure the function that locates the root of the to-be-deleted
subtree during nbtree page deletion.  Handle the conditions that make
page deletion unsafe in a slightly more uniform way, and acknowledge the
fact that the behavior with incomplete splits on internal pages is
different (as pointed out in the nbtree README as of commit 35bc0ec7).
Also invent new terminology that avoids ambiguity around which pages are
about to be deleted.  Consistently use the term "to-be-deleted subtree",
not the ambiguous term "branch".

We were calling the subtree parent page the "top parent page", but that
was quite misleading.  The top parent page usually refers to a page
unlinked from its siblings and marked deleted (during the second stage
of page deletion).  There was one kind of top parent page that we merely
removed a downlink from, and another kind of top parent page that we
actually marked deleted.  Eliminate the ambiguity by inventing a new
term ("subtree parent page") that refers to the former kind of page
only.
2020-05-11 11:01:07 -07:00
..
backend Adjust "root of to-be-deleted subtree" function. 2020-05-11 11:01:07 -07:00
bin Translation updates 2020-05-11 13:14:32 +02:00
common Fix update-unicode target 2020-04-19 14:59:29 +02:00
fe_utils Add SQL type xid8 to expose FullTransactionId to users. 2020-04-07 12:03:59 +12:00
include Adjust "root of to-be-deleted subtree" function. 2020-05-11 11:01:07 -07:00
interfaces Translation updates 2020-05-11 13:14:32 +02:00
makefiles Remove libpq.rc, use win32ver.rc for libpq 2020-01-15 15:06:12 +01:00
pl Translation updates 2020-05-11 13:14:32 +02:00
port Get rid of trailing semicolons in C macro definitions. 2020-05-01 17:28:00 -04:00
template Fix compiler warning for ppoll() on Cygwin 2019-12-22 23:20:00 +01:00
test Fix findoidjoins to recognize oidvector columns. 2020-05-09 16:28:20 -04:00
timezone Update time zone data files to tzdata release 2020a. 2020-04-24 10:54:47 -04:00
tools Fix findoidjoins to recognize oidvector columns. 2020-05-09 16:28:20 -04:00
tutorial Update copyrights for 2020 2020-01-01 12:21:45 -05:00
.gitignore
DEVELOPERS
Makefile Fix partial-build problems introduced by having more generated headers. 2018-04-09 16:42:10 -04:00
Makefile.global.in Update Unicode data to Unicode 13.0.0 and CLDR 37 2020-04-24 09:52:59 +02:00
Makefile.shlib Add PostgreSQL home page to --help output 2020-02-28 13:12:21 +01:00
nls-global.mk NLS: Fix backend gettext triggers 2019-09-23 09:04:20 +02:00