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bb4eefe7bf
DocBook XML is superficially compatible with DocBook SGML but has a slightly stricter DTD that we have been violating in a few cases. Although XSLT doesn't care whether the document is valid, the style sheets don't necessarily process invalid documents correctly, so we need to work toward fixing this. This first commit moves the indexterms in refentry elements to an allowed position. It has no impact on the output.
137 lines
3.4 KiB
Plaintext
137 lines
3.4 KiB
Plaintext
<!--
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doc/src/sgml/ref/drop_opfamily.sgml
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PostgreSQL documentation
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-->
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<refentry id="SQL-DROPOPFAMILY">
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<indexterm zone="sql-dropopfamily">
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<primary>DROP OPERATOR FAMILY</primary>
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</indexterm>
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<refmeta>
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<refentrytitle>DROP OPERATOR FAMILY</refentrytitle>
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<manvolnum>7</manvolnum>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>DROP OPERATOR FAMILY</refname>
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<refpurpose>remove an operator family</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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DROP OPERATOR FAMILY [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> USING <replaceable class="PARAMETER">index_method</replaceable> [ CASCADE | RESTRICT ]
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</synopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<command>DROP OPERATOR FAMILY</command> drops an existing operator family.
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To execute this command you must be the owner of the operator family.
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</para>
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<para>
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<command>DROP OPERATOR FAMILY</command> includes dropping any operator
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classes contained in the family, but it does not drop any of the operators
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or functions referenced by the family. If there are any indexes depending
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on operator classes within the family, you will need to specify
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<literal>CASCADE</> for the drop to complete.
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</para>
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</refsect1>
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<refsect1>
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<title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><literal>IF EXISTS</literal></term>
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<listitem>
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<para>
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Do not throw an error if the operator family does not exist.
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A notice is issued in this case.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">name</replaceable></term>
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<listitem>
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<para>
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The name (optionally schema-qualified) of an existing operator family.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">index_method</replaceable></term>
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<listitem>
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<para>
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The name of the index access method the operator family is for.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>CASCADE</literal></term>
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<listitem>
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<para>
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Automatically drop objects that depend on the operator family.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>RESTRICT</literal></term>
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<listitem>
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<para>
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Refuse to drop the operator family if any objects depend on it.
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This is the default.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>
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Remove the B-tree operator family <literal>float_ops</literal>:
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<programlisting>
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DROP OPERATOR FAMILY float_ops USING btree;
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</programlisting>
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This command will not succeed if there are any existing indexes
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that use operator classes within the family. Add <literal>CASCADE</> to
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drop such indexes along with the operator family.
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</para>
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</refsect1>
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<refsect1>
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<title>Compatibility</title>
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<para>
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There is no <command>DROP OPERATOR FAMILY</command> statement in the
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SQL standard.
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="sql-alteropfamily"></member>
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<member><xref linkend="sql-createopfamily"></member>
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<member><xref linkend="sql-alteropclass"></member>
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<member><xref linkend="sql-createopclass"></member>
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<member><xref linkend="sql-dropopclass"></member>
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</simplelist>
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</refsect1>
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</refentry>
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