139 lines
3.6 KiB
Plaintext
139 lines
3.6 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</literal> 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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and in turn all objects that depend on those objects
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(see <xref linkend="ddl-depend"/>).
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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</literal> 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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