Add mention of index on foreign key for frequently updated primary key
tables.
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.50 2001/12/08 03:24:35 thomas Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.51 2002/01/03 06:26:22 momjian Exp $
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PostgreSQL documentation
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-->
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@ -437,6 +437,13 @@ and <replaceable class="PARAMETER">table_constraint</replaceable> is:
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</varlistentry>
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</variablelist>
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</para>
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<para>
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If primary key column is updated frequently, it may be wise to
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add an index to the <literal>REFERENCES</literal> column so that
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<literal>NO ACTION</literal> and <literal>CASCADE</literal>
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actions associated with the <literal>REFERENCES</literal>
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column can be more efficiently performed.
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</para>
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</listitem>
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</varlistentry>
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@ -472,6 +479,8 @@ and <replaceable class="PARAMETER">table_constraint</replaceable> is:
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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