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-.\" This is -*-nroff-*-
-.\" XXX standard disclaimer belongs here....
-.\" $Header: /cvsroot/pgsql/doc/man/Attic/cluster.l,v 1.1.1.1 1996/08/18 22:14:20 scrappy Exp $
-.TH CLUSTER SQL 01/23/93 Postgres95 Postgres95
-.SH NAME
-cluster \(em give storage clustering advice to Postgres
-.SH SYNOPSIS
-.nf
-\fBcluster\fR indexname \fBon\fR attname
-.fi
-.SH DESCRIPTION
-This command instructs Postgres to cluster the class specified by
-.IR classname
-approximately based on the index specified by
-.IR indexname.
-The index must already have been defined on
-.IR classname.
-.PP
-When a class is clustered, it is physically reordered based on the index
-information. The clustering is static. In other words, if the class is
-updated, it may become unclustered. No attempt is made to keep new
-instances or updated tuples clustered. If desired, the user can
-recluster manually by issuing the command again.
-.SH EXAMPLE
-.nf
-/*
- * cluster employees in based on its salary attribute
- */
-create index emp_ind on emp using btree (salary int4_ops);
-
-cluster emp_ind on emp
-.fi
-