From c0ad595386b6027449ada778162c599e4b09354a Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Tue, 27 Aug 2002 03:38:28 +0000
Subject: [PATCH] I attach a little patch to make CLUSTER set and reset the
indisclustered bit on the indexes.
I also attach clusterdb and clusterdb.sgml; both of them are blatant
rips of vacuumdb and vacuumdb.sgml, but get the job done. Please review
them, as I'm probably making a lot of mistakes with SGML and I can't
compile it here.
vacuumdb itself is not very comfortable to use when the databases have
passwords, because it has to connect once for each table (I can probably
make it connect only once for each database; should I?). Because of
this I added a mention of PGPASSWORDFILE in the documentation, but I
don't know if that is the correct place for that.
Alvaro Herrera
---
doc/src/sgml/ref/allfiles.sgml | 3 +-
doc/src/sgml/ref/clusterdb.sgml | 280 ++++++++++++++++++++++++++
doc/src/sgml/reference.sgml | 3 +-
src/backend/commands/cluster.c | 32 ++-
src/bin/scripts/Makefile | 5 +-
src/bin/scripts/clusterdb | 176 ++++++++++++++++
src/test/regress/expected/cluster.out | 11 +
src/test/regress/sql/cluster.sql | 7 +
8 files changed, 509 insertions(+), 8 deletions(-)
create mode 100644 doc/src/sgml/ref/clusterdb.sgml
create mode 100644 src/bin/scripts/clusterdb
diff --git a/doc/src/sgml/ref/allfiles.sgml b/doc/src/sgml/ref/allfiles.sgml
index c81cded1178..79221044c21 100644
--- a/doc/src/sgml/ref/allfiles.sgml
+++ b/doc/src/sgml/ref/allfiles.sgml
@@ -1,5 +1,5 @@
<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/allfiles.sgml,v 1.46 2002/08/17 03:38:43 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/allfiles.sgml,v 1.47 2002/08/27 03:38:27 momjian Exp $
PostgreSQL documentation
Complete list of usable sgml source files in this directory.
-->
@@ -120,6 +120,7 @@ Complete list of usable sgml source files in this directory.
<!entity vacuum system "vacuum.sgml">
<!-- applications and utilities -->
+<!entity clusterdb system "clusterdb.sgml">
<!entity createdb system "createdb.sgml">
<!entity createlang system "createlang.sgml">
<!entity createuser system "createuser.sgml">
diff --git a/doc/src/sgml/ref/clusterdb.sgml b/doc/src/sgml/ref/clusterdb.sgml
new file mode 100644
index 00000000000..b650ce24e45
--- /dev/null
+++ b/doc/src/sgml/ref/clusterdb.sgml
@@ -0,0 +1,280 @@
+<!--
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/clusterdb.sgml,v 1.1 2002/08/27 03:38:27 momjian Exp $
+PostgreSQL documentation
+-->
+
+<refentry id="APP-CLUSTERDB">
+ <refmeta>
+ <refentrytitle id="APP-CLUSTERDB-TITLE"><application>clusterdb</application></refentrytitle>
+ <manvolnum>1</manvolnum>
+ <refmiscinfo>Application</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname id="clusterdb">clusterdb</refname>
+ <refpurpose>cluster a <productname>PostgreSQL</productname> database</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>clusterdb</command>
+ <arg rep="repeat"><replaceable>connection-options</replaceable></arg>
+ <arg>--table | -t '<replaceable>table</replaceable> </arg>
+ <arg><replaceable>dbname</replaceable></arg>
+ <sbr>
+ <command>clusterdb</command>
+ <arg rep="repeat"><replaceable>connection-options</replaceable></arg>
+ <group><arg>--all</arg><arg>-a</arg></group>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>
+ <application>clusterdb</application> is a utility for clustering tables inside a
+ <productname>PostgreSQL</productname> database.
+ </para>
+
+ <para>
+ <application>clusterdb</application> is a shell script wrapper around the
+ backend command
+ <xref linkend="SQL-CLUSTER" endterm="SQL-CLUSTER-title"> via
+ the <productname>PostgreSQL</productname> interactive terminal
+ <xref linkend="APP-PSQL">. There is no effective
+ difference between clustering databases via this or other methods.
+ <application>psql</application> must be found by the script and
+ a database server must be running at the targeted host. Also, any default
+ settings and environment variables available to <application>psql</application>
+ and the <application>libpq</application> front-end library do apply.
+ </para>
+
+ <para>
+ <application>clusterdb</application> will need to connect several times to the
+ <productname>PostgreSQL</productname> server, asking for the password each
+ time. It will probably be very convenient to have a PGPASSWORDFILE in that case.
+ </para>
+
+ </refsect1>
+
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>
+ <application>clusterdb</application> accepts the following command line arguments:
+
+ <variablelist>
+ <varlistentry>
+ <term>-d <replaceable class="parameter">dbname</replaceable></term>
+ <term>--dbname <replaceable class="parameter">dbname</replaceable></term>
+ <listitem>
+ <para>
+ Specifies the name of the database to be clustered.
+ If this is not specified and <option>-a</option> (or
+ <option>--all</option>) is not used, the database name is read
+ from the environment variable <envar>PGDATABASE</envar>. If
+ that is not set, the user name specified for the connection is
+ used.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-a</term>
+ <term>--all</term>
+ <listitem>
+ <para>
+ Cluster all databases.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-t <replaceable class="parameter">table</replaceable></term>
+ <term>--table <replaceable class="parameter">table</replaceable></term>
+ <listitem>
+ <para>
+ Clusters <replaceable class="parameter">table</replaceable> only.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </para>
+
+ <para>
+ <application>clusterdb</application> also accepts
+ the following command line arguments for connection parameters:
+
+ <variablelist>
+ <varlistentry>
+ <term>-h <replaceable class="parameter">host</replaceable></term>
+ <term>--host <replaceable class="parameter">host</replaceable></term>
+ <listitem>
+ <para>
+ Specifies the host name of the machine on which the
+ server
+ is running. If host begins with a slash, it is used
+ as the directory for the Unix domain socket.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-p <replaceable class="parameter">port</replaceable></term>
+ <term>--port <replaceable class="parameter">port</replaceable></term>
+ <listitem>
+ <para>
+ Specifies the Internet TCP/IP port or local Unix domain socket file
+ extension on which the server
+ is listening for connections.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-U <replaceable class="parameter">username</replaceable></term>
+ <term>--username <replaceable class="parameter">username</replaceable></term>
+ <listitem>
+ <para>
+ User name to connect as
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-W</term>
+ <term>--password</term>
+ <listitem>
+ <para>
+ Force password prompt.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-e</term>
+ <term>--echo</term>
+ <listitem>
+ <para>
+ Echo the commands that <application>clusterdb</application> generates
+ and sends to the server.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-q</term>
+ <term>--quiet</term>
+ <listitem>
+ <para>
+ Do not display a response.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </para>
+ </refsect1>
+
+
+ <refsect1>
+ <title>Diagnostics</title>
+
+ <para>
+ <variablelist>
+ <varlistentry>
+ <term><computeroutput>CLUSTER</computeroutput></term>
+ <listitem>
+ <para>
+ Everything went well.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><computeroutput>clusterdb: Cluster failed.</computeroutput></term>
+ <listitem>
+ <para>
+ Something went wrong. <application>clusterdb</application> is only a wrapper
+ script. See <xref linkend="SQL-CLUSTER" endterm="SQL-CLUSTER-title">
+ and <xref linkend="APP-PSQL"> for a detailed
+ discussion of error messages and potential problems. Note that this message
+ may appear once per table to be clustered.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+ </para>
+ </refsect1>
+
+
+ <refsect1>
+ <title>Environment</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><envar>PGDATABASE</envar></term>
+ <term><envar>PGHOST</envar></term>
+ <term><envar>PGPORT</envar></term>
+ <term><envar>PGUSER</envar></term>
+
+ <listitem>
+ <para>
+ Default connection parameters.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+
+ <refsect1>
+ <title>Examples</title>
+
+ <para>
+ To cluster the database <literal>test</literal>:
+<screen>
+<prompt>$ </prompt><userinput>clusterdb test</userinput>
+</screen>
+ </para>
+
+ <para>
+ To cluster a single table
+ <literal>foo</literal> in a database named
+ <literal>xyzzy</literal>:
+<screen>
+<prompt>$ </prompt><userinput>clusterdb --verbose --table foo xyzzy</userinput>
+</screen>
+ </para>
+
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+
+ <simplelist type="inline">
+ <member><xref linkend="sql-cluster" endterm="sql-cluster-title"></member>
+ </simplelist>
+ </refsect1>
+
+</refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:nil
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+sgml-parent-document:nil
+sgml-default-dtd-file:"../reference.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:"/usr/lib/sgml/catalog"
+sgml-local-ecat-files:nil
+End:
+-->
diff --git a/doc/src/sgml/reference.sgml b/doc/src/sgml/reference.sgml
index 70af1fc6c9f..effe495f1da 100644
--- a/doc/src/sgml/reference.sgml
+++ b/doc/src/sgml/reference.sgml
@@ -1,5 +1,5 @@
<!-- reference.sgml
-$Header: /cvsroot/pgsql/doc/src/sgml/reference.sgml,v 1.35 2002/08/17 03:38:43 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/reference.sgml,v 1.36 2002/08/27 03:38:27 momjian Exp $
PostgreSQL Reference Manual
-->
@@ -165,6 +165,7 @@ Disable this chapter until we have more functions documented.
</para>
</partintro>
+ &clusterdb;
&createdb;
&createlang;
&createuser;
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index 7ca8e1dd329..e8d2aa7e7e3 100644
--- a/src/backend/commands/cluster.c
+++ b/src/backend/commands/cluster.c
@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.86 2002/08/11 21:17:34 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/commands/cluster.c,v 1.87 2002/08/27 03:38:27 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -45,11 +45,12 @@ typedef struct
IndexInfo *indexInfo;
Oid accessMethodOID;
Oid *classOID;
+ bool isclustered;
} IndexAttrs;
static Oid make_new_heap(Oid OIDOldHeap, const char *NewName);
static void copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex);
-static List *get_indexattr_list(Relation OldHeap);
+static List *get_indexattr_list(Relation OldHeap, Oid OldIndex);
static void recreate_indexattr(Oid OIDOldHeap, List *indexes);
static void swap_relfilenodes(Oid r1, Oid r2);
@@ -121,7 +122,7 @@ cluster(RangeVar *oldrelation, char *oldindexname)
RelationGetRelationName(OldHeap));
/* Save the information of all indexes on the relation. */
- indexes = get_indexattr_list(OldHeap);
+ indexes = get_indexattr_list(OldHeap, OIDOldIndex);
/* Drop relcache refcnts, but do NOT give up the locks */
index_close(OldIndex);
@@ -274,7 +275,7 @@ copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex)
* return a list of IndexAttrs structures.
*/
static List *
-get_indexattr_list(Relation OldHeap)
+get_indexattr_list(Relation OldHeap, Oid OldIndex)
{
List *indexes = NIL;
List *indlist;
@@ -305,6 +306,12 @@ get_indexattr_list(Relation OldHeap)
memcpy(attrs->classOID, indexForm->indclass,
sizeof(Oid) * attrs->indexInfo->ii_NumIndexAttrs);
+ /* We'll set indisclustered at index creation time on the
+ * index we are currently clustering, and reset it on other
+ * indexes.
+ */
+ attrs->isclustered = (OldIndex == indexOID ? true : false);
+
/* Name and access method of each index come from pg_class */
classTuple = SearchSysCache(RELOID,
ObjectIdGetDatum(indexOID),
@@ -343,6 +350,9 @@ recreate_indexattr(Oid OIDOldHeap, List *indexes)
Oid newIndexOID;
char newIndexName[NAMEDATALEN];
ObjectAddress object;
+ Form_pg_index index;
+ HeapTuple tuple;
+ Relation pg_index;
/* Create the new index under a temporary name */
snprintf(newIndexName, NAMEDATALEN, "pg_temp_%u", attrs->indexOID);
@@ -364,6 +374,20 @@ recreate_indexattr(Oid OIDOldHeap, List *indexes)
CommandCounterIncrement();
+ /* Set indisclustered to the correct value. Only one index is
+ * allowed to be clustered.
+ */
+ pg_index = heap_openr(IndexRelationName, RowExclusiveLock);
+ tuple = SearchSysCacheCopy(INDEXRELID,
+ ObjectIdGetDatum(attrs->indexOID),
+ 0, 0, 0);
+ index = (Form_pg_index) GETSTRUCT(tuple);
+ index->indisclustered = attrs->isclustered;
+ simple_heap_update(pg_index, &tuple->t_self, tuple);
+ CatalogUpdateIndexes(pg_index, tuple);
+ heap_freetuple(tuple);
+ heap_close(pg_index, NoLock);
+
/* Destroy new index with old filenode */
object.classId = RelOid_pg_class;
object.objectId = newIndexOID;
diff --git a/src/bin/scripts/Makefile b/src/bin/scripts/Makefile
index 4a574b464aa..db87a9efc01 100644
--- a/src/bin/scripts/Makefile
+++ b/src/bin/scripts/Makefile
@@ -5,7 +5,7 @@
# Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
# Portions Copyright (c) 1994, Regents of the University of California
#
-# $Header: /cvsroot/pgsql/src/bin/scripts/Makefile,v 1.15 2002/06/20 20:29:42 momjian Exp $
+# $Header: /cvsroot/pgsql/src/bin/scripts/Makefile,v 1.16 2002/08/27 03:38:27 momjian Exp $
#
#-------------------------------------------------------------------------
@@ -13,7 +13,8 @@ subdir = src/bin/scripts
top_builddir = ../../..
include $(top_builddir)/src/Makefile.global
-SCRIPTS := createdb dropdb createuser dropuser createlang droplang vacuumdb
+SCRIPTS := createdb dropdb createuser dropuser createlang droplang vacuumdb \
+ clusterdb
all: $(SCRIPTS)
diff --git a/src/bin/scripts/clusterdb b/src/bin/scripts/clusterdb
new file mode 100644
index 00000000000..58430e2d6a9
--- /dev/null
+++ b/src/bin/scripts/clusterdb
@@ -0,0 +1,176 @@
+#!/bin/sh
+#-------------------------------------------------------------------------
+#
+# clusterdb--
+# cluster a postgres database
+#
+# This script runs psql with the "-c" option to cluster
+# the requested database.
+#
+# Copyright (c) 2002, PostgreSQL Global Development Group
+#
+#
+# IDENTIFICATION
+# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/clusterdb,v 1.1 2002/08/27 03:38:27 momjian Exp $
+#
+#-------------------------------------------------------------------------
+
+CMDNAME=`basename "$0"`
+PATHNAME=`echo "$0" | sed "s,$CMDNAME\$,,"`
+
+PSQLOPT=
+table=
+dbname=
+alldb=
+quiet=0
+
+while [ "$#" -gt 0 ]
+do
+ case "$1" in
+ --help|-\?)
+ usage=t
+ break
+ ;;
+# options passed on to psql
+ --host|-h)
+ PSQLOPT="$PSQLOPT -h $2"
+ shift;;
+ -h*)
+ PSQLOPT="$PSQLOPT $1"
+ ;;
+ --host=*)
+ PSQLOPT="$PSQLOPT -h `echo \"$1\" | sed 's/^--host=//'`"
+ ;;
+ --port|-p)
+ PSQLOPT="$PSQLOPT -p $2"
+ shift;;
+ -p*)
+ PSQLOPT="$PSQLOPT $1"
+ ;;
+ --port=*)
+ PSQLOPT="$PSQLOPT -p `echo \"$1\" | sed 's/^--port=//'`"
+ ;;
+ --username|-U)
+ PSQLOPT="$PSQLOPT -U $2"
+ shift;;
+ -U*)
+ PSQLOPT="$PSQLOPT $1"
+ ;;
+ --username=*)
+ PSQLOPT="$PSQLOPT -U `echo \"$1\" | sed 's/^--username=//'`"
+ ;;
+ --password|-W)
+ PSQLOPT="$PSQLOPT -W"
+ ;;
+ --echo|-e)
+ ECHOOPT="-e"
+ ;;
+ --quiet|-q)
+ ECHOOPT="$ECHOOPT -o /dev/null"
+ quiet=1
+ ;;
+ --dbname|-d)
+ dbname="$2"
+ shift;;
+ -d*)
+ dbname=`echo $1 | sed 's/^-d//'`
+ ;;
+ --dbname=*)
+ dbname=`echo $1 | sed 's/^--dbname=//'`
+ ;;
+ -a|--alldb)
+ alldb=1
+ ;;
+# options converted into SQL command
+ --table|-t)
+ table="$2"
+ shift;;
+ -t*)
+ table=`echo $1 | sed 's/^-t//'`
+ ;;
+ --table=*)
+ table=`echo $1 | sed 's/^--table=//'`
+ ;;
+ -*)
+ echo "$CMDNAME: invalid option: $1" 1>&2
+ echo "Try '$CMDNAME --help' for more information." 1>&2
+ exit 1
+ ;;
+ *)
+ dbname="$1"
+ if [ "$#" -ne 1 ]; then
+ echo "$CMDNAME: invalid option: $2" 1>&2
+ echo "Try '$CMDNAME --help' for more information." 1>&2
+ exit 1
+ fi
+ ;;
+ esac
+ shift
+done
+
+if [ "$usage" ]; then
+ echo "$CMDNAME cluster all previously clustered tables in a database"
+ echo
+ echo "Usage:"
+ echo " $CMDNAME [options] [dbname]"
+ echo
+ echo "Options:"
+ echo " -h, --host=HOSTNAME Database server host"
+ echo " -p, --port=PORT Database server port"
+ echo " -U, --username=USERNAME Username to connect as"
+ echo " -W, --password Prompt for password"
+ echo " -d, --dbname=DBNAME Database to cluster"
+ echo " -a, --all Cluster all databases"
+ echo " -t, --table='TABLE[(columns)]' Cluster specific table only"
+ echo " -v, --verbose Write a lot of output"
+ echo " -e, --echo Show the command being sent to the backend"
+ echo " -q, --quiet Don't write any output"
+ echo
+ echo "Read the description of the SQL command VACUUM for details."
+ echo
+ echo "Report bugs to <pgsql-bugs@postgresql.org>."
+ exit 0
+fi
+
+if [ "$alldb" ]; then
+ if [ "$dbname" -o "$table" ]; then
+ echo "$CMDNAME: cannot cluster all databases and a specific one at the same time" 1>&2
+ exit 1
+ fi
+ dbname=`${PATHNAME}psql $PSQLOPT -q -t -A -d template1 -c 'SELECT datname FROM pg_database WHERE datallowconn'`
+
+elif [ -z "$dbname" ]; then
+ if [ "$PGDATABASE" ]; then
+ dbname="$PGDATABASE"
+ elif [ "$PGUSER" ]; then
+ dbname="$PGUSER"
+ else
+ dbname=`${PATHNAME}pg_id -u -n`
+ fi
+ [ "$?" -ne 0 ] && exit 1
+fi
+
+for db in $dbname
+do
+ [ "$alldb" -a "$quiet" -ne 1 ] && echo "Clustering $db"
+ query="SELECT pg_class.relname, pg_class_2.relname FROM pg_class, \
+ pg_class AS pg_class_2, pg_index WHERE pg_class.oid=pg_index.indrelid\
+ AND pg_class_2.oid=pg_index.indexrelid AND pg_index.indisclustered"
+ if [ -z "$table" ]; then
+ tables=`${PATHNAME}psql $db $PSQLOPT -F: -P format=unaligned -t -c "$query"`
+ else
+ tables=`${PATHNAME}psql $db $PSQLOPT -F: -P format=unaligned -t -c \
+ "$query AND pg_class.relname='$table'"`
+ fi
+ for tabs in $tables
+ do
+ tab=`echo $tabs | cut -d: -f1`
+ idx=`echo $tabs | cut -d: -f2`
+ ${PATHNAME}psql $PSQLOPT $ECHOOPT -c "CLUSTER $idx on $tab" -d $db
+ if [ "$?" -ne 0 ]; then
+ echo "$CMDNAME: cluster $table $db failed" 1>&2
+ fi
+ done
+done
+
+exit 0
diff --git a/src/test/regress/expected/cluster.out b/src/test/regress/expected/cluster.out
index a76536ac8d4..6a2ba61e832 100644
--- a/src/test/regress/expected/cluster.out
+++ b/src/test/regress/expected/cluster.out
@@ -274,3 +274,14 @@ FROM pg_class c WHERE relname LIKE 'clstr_tst%' ORDER BY relname;
clstr_tst_s_rf_a_seq | S | f
(11 rows)
+-- Verify that indisclustered is correctly set
+SELECT pg_class.relname FROM pg_index, pg_class, pg_class AS pg_class_2
+WHERE pg_class.oid=indexrelid
+ AND indrelid=pg_class_2.oid
+ AND pg_class_2.relname = 'clstr_tst'
+ AND indisclustered;
+ relname
+-------------
+ clstr_tst_c
+(1 row)
+
diff --git a/src/test/regress/sql/cluster.sql b/src/test/regress/sql/cluster.sql
index 599f6ebd82c..384a185d09e 100644
--- a/src/test/regress/sql/cluster.sql
+++ b/src/test/regress/sql/cluster.sql
@@ -79,3 +79,10 @@ SELECT conname FROM pg_constraint WHERE conrelid = 'clstr_tst'::regclass;
SELECT relname, relkind,
EXISTS(SELECT 1 FROM pg_class WHERE oid = c.reltoastrelid) AS hastoast
FROM pg_class c WHERE relname LIKE 'clstr_tst%' ORDER BY relname;
+
+-- Verify that indisclustered is correctly set
+SELECT pg_class.relname FROM pg_index, pg_class, pg_class AS pg_class_2
+WHERE pg_class.oid=indexrelid
+ AND indrelid=pg_class_2.oid
+ AND pg_class_2.relname = 'clstr_tst'
+ AND indisclustered;
--
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