mirror of
https://github.com/postgres/postgres.git
synced 2025-07-31 22:04:40 +03:00
config
contrib
adminpack
amcheck
auth_delay
auto_explain
bloom
btree_gin
btree_gist
citext
cube
dblink
expected
input
output
sql
.gitignore
dblink.sql
.gitignore
Makefile
dblink--1.0--1.1.sql
dblink--1.1--1.2.sql
dblink--1.2.sql
dblink--unpackaged--1.0.sql
dblink.c
dblink.control
pg_service.conf
dict_int
dict_xsyn
earthdistance
file_fdw
fuzzystrmatch
hstore
hstore_plperl
hstore_plpython
intagg
intarray
isn
jsonb_plperl
jsonb_plpython
lo
ltree
ltree_plpython
oid2name
pageinspect
passwordcheck
pg_buffercache
pg_freespacemap
pg_prewarm
pg_standby
pg_stat_statements
pg_trgm
pg_visibility
pgcrypto
pgrowlocks
pgstattuple
postgres_fdw
seg
sepgsql
spi
sslinfo
start-scripts
tablefunc
tcn
test_decoding
tsm_system_rows
tsm_system_time
unaccent
uuid-ossp
vacuumlo
xml2
Makefile
README
contrib-global.mk
doc
src
.dir-locals.el
.gitattributes
.gitignore
COPYRIGHT
GNUmakefile.in
HISTORY
Makefile
README
README.git
aclocal.m4
configure
configure.in
This patch introduces INCLUDE clause to index definition. This clause specifies a list of columns which will be included as a non-key part in the index. The INCLUDE columns exist solely to allow more queries to benefit from index-only scans. Also, such columns don't need to have appropriate operator classes. Expressions are not supported as INCLUDE columns since they cannot be used in index-only scans. Index access methods supporting INCLUDE are indicated by amcaninclude flag in IndexAmRoutine. For now, only B-tree indexes support INCLUDE clause. In B-tree indexes INCLUDE columns are truncated from pivot index tuples (tuples located in non-leaf pages and high keys). Therefore, B-tree indexes now might have variable number of attributes. This patch also provides generic facility to support that: pivot tuples contain number of their attributes in t_tid.ip_posid. Free 13th bit of t_info is used for indicating that. This facility will simplify further support of index suffix truncation. The changes of above are backward-compatible, pg_upgrade doesn't need special handling of B-tree indexes for that. Bump catalog version Author: Anastasia Lubennikova with contribition by Alexander Korotkov and me Reviewed by: Peter Geoghegan, Tomas Vondra, Antonin Houska, Jeff Janes, David Rowley, Alexander Korotkov Discussion: https://www.postgresql.org/message-id/flat/56168952.4010101@postgrespro.ru