Add hash partitioning. Hash partitioning is useful when you want to partition a growing data set evenly. This can be useful to keep table sizes reasonable, which makes maintenance operations such as VACUUM faster, or to enable partition-wise join.
At present, we still depend on constraint exclusion for partitioning pruning, and the shape of the partition constraints for hash partitioning is such that that doesn't work. Work is underway to fix that, which should both improve performance and make partitioning pruning work with hash partitioning. Amul Sul, reviewed and tested by Dilip Kumar, Ashutosh Bapat, Yugo Nagata, Rajkumar Raghuwanshi, Jesper Pedersen, and by me. A few final tweaks also by me. Discussion: http://postgr.es/m/CAAJ_b96fhpJAP=albetmelk1uni_gfzd938zgenhf49qgdt...@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/1aba8e651ac3e37e1d2d875842de1e0ed22a651e Modified Files -------------- doc/src/sgml/ddl.sgml | 28 +- doc/src/sgml/ref/alter_table.sgml | 7 + doc/src/sgml/ref/create_table.sgml | 85 +++- src/backend/catalog/partition.c | 682 ++++++++++++++++++++++++--- src/backend/commands/tablecmds.c | 48 +- src/backend/nodes/copyfuncs.c | 2 + src/backend/nodes/equalfuncs.c | 2 + src/backend/nodes/outfuncs.c | 2 + src/backend/nodes/readfuncs.c | 2 + src/backend/optimizer/path/joinrels.c | 12 +- src/backend/parser/gram.y | 76 ++- src/backend/parser/parse_utilcmd.c | 29 +- src/backend/utils/adt/ruleutils.c | 15 +- src/backend/utils/cache/relcache.c | 26 +- src/bin/psql/tab-complete.c | 2 +- src/include/catalog/catversion.h | 2 +- src/include/catalog/partition.h | 3 + src/include/catalog/pg_proc.h | 4 + src/include/nodes/parsenodes.h | 8 +- src/test/regress/expected/alter_table.out | 62 +++ src/test/regress/expected/create_table.out | 78 ++- src/test/regress/expected/insert.out | 46 ++ src/test/regress/expected/partition_join.out | 81 ++++ src/test/regress/expected/update.out | 29 ++ src/test/regress/sql/alter_table.sql | 64 +++ src/test/regress/sql/create_table.sql | 51 +- src/test/regress/sql/insert.sql | 33 ++ src/test/regress/sql/partition_join.sql | 32 ++ src/test/regress/sql/update.sql | 28 ++ src/tools/pgindent/typedefs.list | 1 + 30 files changed, 1420 insertions(+), 120 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers