Don't uselessly rewrite, truncate, VACUUM, or ANALYZE partitioned tables.

Also, recursively perform VACUUM and ANALYZE on partitions when the
command is applied to a partitioned table.  In passing, some related
documentation updates.

Amit Langote, reviewed by Michael Paquier, Ashutosh Bapat, and by me.

Discussion: 
http://postgr.es/m/[email protected]

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/3c3bb99330aa9b4c2f6258bfa0265d806bf365c3

Modified Files
--------------
doc/src/sgml/ddl.sgml            | 47 ++++++++++++++++++------------------
doc/src/sgml/ref/analyze.sgml    |  7 ++++--
doc/src/sgml/ref/vacuum.sgml     |  4 +++-
src/backend/commands/analyze.c   | 37 +++++++++++++++++++----------
src/backend/commands/tablecmds.c | 15 +++++++++---
src/backend/commands/vacuum.c    | 51 +++++++++++++++++++++++++++++++++++++---
6 files changed, 116 insertions(+), 45 deletions(-)


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