From: Scott Carey <scott@richrelevance.com>
To: postgres performance list <pgsql-performance@postgresql.org>
Date: Tue, 22 Jun 2010 10:30:35 -0700
Subject: ALTER Table and CLUSTER does adding a new column rewrite clustered?
	(8.4.3)
Thread-Topic: ALTER Table and CLUSTER does adding a new column rewrite
	clustered? (8.4.3)
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v. 8.4.3=20

I have a table that has several indexes, one of which the table is clustere=
d on.  If I do an ALTER TABLE Foo ADD COLUMN bar integer not null default -=
1;

It re-writes the whole table.

* Does it adhere to the CLUSTER property of the table and write the new ver=
sion clustered?
* Does it properly write it with the FILLFACTOR setting?
* Are all the indexes re-created too, or are they bloated and need a REINDE=
X?

http://www.postgresql.org/docs/8.4/static/sql-altertable.html=20
  does not seem to answer the above, it mentions the conditions that cause =
a rewrite but does not say what the state is after the rewrite with respect=
 to CLUSTER, FILLFACTOR, and index bloat.

Thanks in advance!