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119 lines
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119 lines
3.0 KiB
Plaintext
<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/alter_type.sgml,v 1.4 2006/09/16 00:30:16 momjian Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-ALTERTYPE">
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<refmeta>
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<refentrytitle id="sql-altertype-title">ALTER TYPE</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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ALTER TYPE
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</refname>
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<refpurpose>
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change the definition of a type
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</refpurpose>
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</refnamediv>
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<indexterm zone="sql-altertype">
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<primary>ALTER TYPE</primary>
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</indexterm>
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<refsynopsisdiv>
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<synopsis>
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ALTER TYPE <replaceable class="PARAMETER">name</replaceable> OWNER TO <replaceable class="PARAMETER">new_owner</replaceable>
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ALTER TYPE <replaceable class="PARAMETER">name</replaceable> SET SCHEMA <replaceable class="PARAMETER">new_schema</replaceable>
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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>ALTER TYPE</command> changes the definition of an existing type.
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The only currently available capabilities are changing the owner and schema
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of a type.
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</para>
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<para>
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You must own the type to use <command>ALTER TYPE</>.
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To change the schema of a type, you must also have
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<literal>CREATE</literal> privilege on the new schema.
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To alter the owner, you must also be a direct or indirect member of the new
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owning role, and that role must have <literal>CREATE</literal> privilege on
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the type's schema. (These restrictions enforce that altering the owner
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doesn't do anything you couldn't do by dropping and recreating the type.
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However, a superuser can alter ownership of any type anyway.)
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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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<para>
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<variablelist>
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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 (possibly schema-qualified) of an existing type to
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alter.
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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">new_owner</replaceable></term>
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<listitem>
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<para>
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The user name of the new owner of the type.
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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">new_schema</replaceable></term>
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<listitem>
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<para>
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The new schema for the type.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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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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To change the owner of the user-defined type <literal>email</literal>
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to <literal>joe</literal>:
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<programlisting>
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ALTER TYPE email OWNER TO joe;
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</programlisting>
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</para>
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<para>
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To change the schema of the user-defined type <literal>email</literal>
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to <literal>customers</literal>:
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<programlisting>
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ALTER TYPE email SET SCHEMA customers;
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</programlisting>
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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>ALTER TYPE</command> statement in the SQL
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standard.
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</para>
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</refsect1>
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</refentry>
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