Index: doc/src/sgml/ref/cluster.sgml
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RCS file: /projects/cvsroot/pgsql/doc/src/sgml/ref/cluster.sgml,v
retrieving revision 1.37
diff -c -r1.37 cluster.sgml
*** doc/src/sgml/ref/cluster.sgml 31 Oct 2006 01:52:31 -0000 1.37
--- doc/src/sgml/ref/cluster.sgml 4 Nov 2006 13:14:19 -0000
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*** 153,160 ****
which uses the PostgreSQL sorting code in
the ORDER BY clause to create the desired order; this is usually much
! faster than an index scan for
! unordered data. You then drop the old table, use
ALTER TABLE ... RENAME
to rename newtable to the old name, and
recreate the table's indexes. However, this approach does not preserve
--- 153,161 ----
which uses the PostgreSQL sorting code in
the ORDER BY clause to create the desired order; this is usually much
! faster than an index scan for unordered data (during that operation, you
! need free space on disk at least equal to two times the table size).
! You then drop the old table, use
ALTER TABLE ... RENAME
to rename newtable to the old name, and
recreate the table's indexes. However, this approach does not preserve