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<refentry id="SQL-DROPNODEGROUP">
<indexterm zone="sql-dropnodegroup">
<primary>DROP NODE GROUP</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP NODE GROUP</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP NODE GROUP</refname>
<refpurpose>drop a group of cluster nodes</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP NODE GROUP <replaceable class="parameter">groupname</replaceable>
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP NODE GROUP</command> is SQL command specific
to <productname>Postgres-XL</productname> that deletes
node group information in catalog pgxc_group.
</para>
<para>
A group of nodes works as an alias for node lists when defining tables
on sub-clusters.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><replaceable class="parameter">groupname</replaceable></term>
<listitem>
<para>
The name of the selected cluster node group.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Drop a cluster node group.
<programlisting>
DROP NODE GROUP cluster_group;
</programlisting>
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
<command>DROP NODE GROUP</command> does not conform to the <acronym>
SQL</acronym> standards, it is a Postgres-XL specific command.
</para>
</refsect1>
</refentry>
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