pgsql: Support unlogged tables.

Support unlogged tables.

The contents of an unlogged table are WAL-logged; thus, they are not
available on standby servers and are truncated whenever the database
system enters recovery.  Indexes on unlogged tables are also unlogged.
Unlogged GiST indexes are not currently supported.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=53dbc27c62d8e1b6c5253feba04a5094cb8fe046

Modified Files
--------------
doc/src/sgml/catalogs.sgml            |    3 +-
doc/src/sgml/indexam.sgml             |   11 +
doc/src/sgml/ref/create_table.sgml    |   21 ++-
doc/src/sgml/ref/create_table_as.sgml |   12 +-
doc/src/sgml/ref/pg_dump.sgml         |   11 +
doc/src/sgml/ref/pg_dumpall.sgml      |   11 +
doc/src/sgml/storage.sgml             |   22 ++-
src/backend/access/gin/gininsert.c    |   42 ++++
src/backend/access/gist/gist.c        |   13 +
src/backend/access/hash/hash.c        |   15 ++-
src/backend/access/hash/hashovfl.c    |    9 +-
src/backend/access/hash/hashpage.c    |   20 +-
src/backend/access/nbtree/nbtree.c    |   31 +++
src/backend/access/transam/xlog.c     |   17 ++
src/backend/catalog/catalog.c         |   14 +-
src/backend/catalog/heap.c            |   19 ++
src/backend/catalog/index.c           |   11 +
src/backend/catalog/storage.c         |   49 +++--
src/backend/commands/tablecmds.c      |   19 +-
src/backend/parser/gram.y             |   11 +-
src/backend/storage/buffer/bufmgr.c   |   53 +++--
src/backend/storage/file/Makefile     |    2 +-
src/backend/storage/file/copydir.c    |    3 +-
src/backend/storage/file/fd.c         |    2 +-
src/backend/storage/file/reinit.c     |  396 +++++++++++++++++++++++++++++++++
src/backend/utils/adt/dbsize.c        |    1 +
src/backend/utils/cache/relcache.c    |    2 +
src/bin/pg_dump/pg_dump.c             |   71 +++++-
src/bin/pg_dump/pg_dump.h             |    1 +
src/bin/pg_dump/pg_dumpall.c          |    7 +
src/bin/psql/describe.c               |   36 +++-
src/include/access/gin.h              |    1 +
src/include/access/gist_private.h     |    1 +
src/include/access/hash.h             |    9 +-
src/include/access/nbtree.h           |    1 +
src/include/catalog/catalog.h         |    2 +-
src/include/catalog/catversion.h      |    2 +-
src/include/catalog/pg_am.h           |   18 +-
src/include/catalog/pg_class.h        |    1 +
src/include/catalog/pg_proc.h         |    8 +
src/include/catalog/storage.h         |    2 +
src/include/parser/kwlist.h           |    1 +
src/include/pg_config_manual.h        |    2 +-
src/include/storage/buf_internals.h   |    1 +
src/include/storage/bufmgr.h          |    6 +-
src/include/storage/copydir.h         |    1 +
src/include/storage/reinit.h          |   23 ++
src/include/storage/relfilenode.h     |    5 +-
src/include/utils/rel.h               |    1 +
49 files changed, 916 insertions(+), 104 deletions(-)