Log Message:
-----------
Disallow CLUSTER using an invalid index (that is, one left over from a failed
CREATE INDEX CONCURRENTLY). Such an index might not have entries for every
heap row and thus clustering with it would result in silent data loss.
The scenario requires a pretty foolish DBA, but still ...
Modified Files:
--------------
pgsql/src/backend/commands:
cluster.c (r1.163 -> r1.164)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/cluster.c?r1=1.163&r2=1.164)
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TIP 2: Don't 'kill -9' the postmaster
