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Tom Lane d2ddee63b4 Improve SP-GiST opclass API to better support unlabeled nodes. ... Previously, the spgSplitTuple action could only create a new upper tuple containing a single labeled node. This made it useless for opclasses that prefer to work with fixed sets of nodes (labeled or otherwise), which meant that restrictive prefixes could not be used with such node definitions. Change the output field set for the choose() method to allow it to specify any valid node set for the new upper tuple, and to specify which of these nodes to place the modified lower tuple in. In addition to its primary use for fixed node sets, this feature could allow existing opclasses that use variable node sets to skip a separate spgAddNode action when splitting a tuple, by setting up the node needed for the incoming value as part of the spgSplitTuple action. However, care would have to be taken to add the extra node only when it would not make the tuple bigger than before. (spgAddNode can enlarge the tuple, spgSplitTuple can't.) This is a prerequisite for an upcoming SP-GiST inet opclass, but is being committed separately to increase the visibility of the API change. In passing, improve the documentation about the traverse-values feature that was added by commit ccd6eb49a. Emre Hasegeli, with cosmetic adjustments and documentation rework by me Discussion: <CAE2gYzxtth9qatW_OAqdOjykS0bxq7AYHLuyAQLPgT7H9ZU0Cw@mail.gmail.com>		10 years ago
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backend	Improve SP-GiST opclass API to better support unlabeled nodes.	10 years ago
bin	initdb now needs submake-libpq and submake-libpgfeutils.	10 years ago
common	pgindent run for 9.6	10 years ago
fe_utils	Make initdb's suggested "pg_ctl start" command line more reliable.	10 years ago
include	Improve SP-GiST opclass API to better support unlabeled nodes.	10 years ago
interfaces	Automate the maintenance of SO_MINOR_VERSION for our shared libraries.	10 years ago
makefiles	…
pl	In plpgsql, don't try to convert int2vector or oidvector to expanded array.	10 years ago
port	Stamp HEAD as 10devel.	10 years ago
template	…
test	Add txid_current_ifassigned().	10 years ago
timezone	Update time zone data files to tzdata release 2016f.	10 years ago
tools	initdb now needs to reference libpq include files in MSVC builds.	10 years ago
tutorial	…
.gitignore	…
DEVELOPERS	…
Makefile	…
Makefile.global.in	Provide and use a makefile target to build all generated headers.	10 years ago
Makefile.shlib	Make the AIX case of Makefile.shlib safe for parallel make.	10 years ago
bcc32.mak	…
nls-global.mk	nls-global.mk: search build dir for source files, too	10 years ago
win32.mak	…