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<!--
doc/src/sgml/ref/drop_operator.sgml
PostgreSQL documentation
-->
<refentry id="sql-dropoperator">
<indexterm zone="sql-dropoperator">
<primary>DROP OPERATOR</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP OPERATOR</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP OPERATOR</refname>
<refpurpose>remove an operator</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP OPERATOR [ IF EXISTS ] <replaceable class="parameter">name</replaceable> ( { <replaceable class="parameter">left_type</replaceable> | NONE } , <replaceable class="parameter">right_type</replaceable> ) [, ...] [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP OPERATOR</command> drops an existing operator from
the database system. To execute this command you must be the owner
of the operator.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the operator does not exist. A notice is issued
in this case.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of an existing operator.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">left_type</replaceable></term>
<listitem>
<para>
The data type of the operator's left operand; write
<literal>NONE</literal> if the operator has no left operand.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">right_type</replaceable></term>
<listitem>
<para>
The data type of the operator's right operand.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the operator (such as views
using it), and in turn all objects that depend on those objects
(see <xref linkend="ddl-depend"/>).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
Refuse to drop the operator if any objects depend on it. This
is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Remove the power operator <literal>a^b</literal> for type <type>integer</type>:
<programlisting>
DROP OPERATOR ^ (integer, integer);
</programlisting>
</para>
<para>
Remove the bitwise-complement prefix operator
<literal>~b</literal> for type <type>bit</type>:
<programlisting>
DROP OPERATOR ~ (none, bit);
</programlisting>
</para>
<para>
Remove multiple operators in one command:
<programlisting>
DROP OPERATOR ~ (none, bit), ^ (integer, integer);
</programlisting></para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
There is no <command>DROP OPERATOR</command> statement in the SQL standard.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createoperator"/></member>
<member><xref linkend="sql-alteroperator"/></member>
</simplelist>
</refsect1>
</refentry>
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