Tom Lane c6a11b89e4 Teach SPGiST to store nulls and do whole-index scans. ... This patch fixes the other major compatibility-breaking limitation of SPGiST, that it didn't store anything for null values of the indexed column, and so could not support whole-index scans or "x IS NULL" tests. The approach is to create a wholly separate search tree for the null entries, and use fixed "allTheSame" insertion and search rules when processing this tree, instead of calling the index opclass methods. This way the opclass methods do not need to worry about dealing with nulls. Catversion bump is for pg_am updates as well as the change in on-disk format of SPGiST indexes; there are some tweaks in SPGiST WAL records as well. Heavily rewritten version of a patch by Oleg Bartunov and Teodor Sigaev. (The original also stored nulls separately, but it reused GIN code to do so; which required undesirable compromises in the on-disk format, and would likely lead to bugs due to the GIN code being required to work in two very different contexts.)		2012-03-11 16:29:59 -04:00
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common	Update outdated comment. HeapTupleHeader.t_natts field doesn't exist anymore.	2012-03-09 08:07:56 +02:00
gin	Fix some more bugs in GIN's WAL replay logic.	2012-02-26 15:12:17 -05:00
gist	When a GiST page is split during index build, it might not have a buffer.	2012-03-02 13:16:09 +02:00
hash	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
heap	Fix heap_multi_insert to set t_self field in the caller's tuples.	2012-02-13 10:20:50 +02:00
index	Update copyright notices for year 2012.	2012-01-01 18:01:58 -05:00
nbtree	Don't clear btpo_cycleid during _bt_vacuum_one_page.	2012-02-21 15:03:36 -05:00
spgist	Teach SPGiST to store nulls and do whole-index scans.	2012-03-11 16:29:59 -04:00
transam	Silence warning about unused variable, when building without assertions.	2012-03-08 11:10:02 +02:00
Makefile	Add SP-GiST (space-partitioned GiST) index access method.	2011-12-17 16:42:30 -05:00