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><H1
><A
NAME="SQL-ALTERVIEW"
></A
>ALTER VIEW</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN58021"
></A
><H2
>Name</H2
>ALTER VIEW&nbsp;--&nbsp;change the definition of a view</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN58026"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>ALTER VIEW <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ALTER [ COLUMN ] <TT
CLASS="REPLACEABLE"
><I
>column</I
></TT
> SET DEFAULT <TT
CLASS="REPLACEABLE"
><I
>expression</I
></TT
>
ALTER VIEW <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> ALTER [ COLUMN ] <TT
CLASS="REPLACEABLE"
><I
>column</I
></TT
> DROP DEFAULT
ALTER VIEW <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> OWNER TO <TT
CLASS="REPLACEABLE"
><I
>new_owner</I
></TT
>
ALTER VIEW <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> RENAME TO <TT
CLASS="REPLACEABLE"
><I
>new_name</I
></TT
>
ALTER VIEW <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> SET SCHEMA <TT
CLASS="REPLACEABLE"
><I
>new_schema</I
></TT
></PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN58039"
></A
><H2
>Description</H2
><P
>   <TT
CLASS="COMMAND"
>ALTER VIEW</TT
> changes various auxiliary properties
   of a view.  (If you want to modify the view's defining query,
   use <TT
CLASS="COMMAND"
>CREATE OR REPLACE VIEW</TT
>.)
  </P
><P
>   You must own the view to use <TT
CLASS="COMMAND"
>ALTER VIEW</TT
>.
   To change a view's schema, you must also have <TT
CLASS="LITERAL"
>CREATE</TT
>
   privilege on the new schema.
   To alter the owner, you must also be a direct or indirect member of the new
   owning role, and that role must have <TT
CLASS="LITERAL"
>CREATE</TT
> privilege on
   the view's schema.  (These restrictions enforce that altering the owner
   doesn't do anything you couldn't do by dropping and recreating the view.
   However, a superuser can alter ownership of any view anyway.)
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN58048"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
></DT
><DD
><P
>      The name (optionally schema-qualified) of an existing view.
     </P
></DD
><DT
><TT
CLASS="LITERAL"
>SET</TT
>/<TT
CLASS="LITERAL"
>DROP DEFAULT</TT
></DT
><DD
><P
>      These forms set or remove the default value for a column.
      A default value associated with a view column is
      inserted into <TT
CLASS="COMMAND"
>INSERT</TT
> statements on the view before
      the view's <TT
CLASS="LITERAL"
>ON INSERT</TT
> rule is applied, if
      the <TT
CLASS="COMMAND"
>INSERT</TT
> does not specify a value for the column.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_owner</I
></TT
></DT
><DD
><P
>      The user name of the new owner of the view.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_name</I
></TT
></DT
><DD
><P
>      The new name for the view.
     </P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_schema</I
></TT
></DT
><DD
><P
>      The new schema for the view.
     </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN58080"
></A
><H2
>Notes</H2
><P
>   For historical reasons, <TT
CLASS="COMMAND"
>ALTER TABLE</TT
> can be used with
   views too; but the only variants of <TT
CLASS="COMMAND"
>ALTER TABLE</TT
>
   that are allowed with views are equivalent to the ones shown above.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN58085"
></A
><H2
>Examples</H2
><P
>   To rename the view <TT
CLASS="LITERAL"
>foo</TT
> to
   <TT
CLASS="LITERAL"
>bar</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER VIEW foo RENAME TO bar;</PRE
><P>
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN58091"
></A
><H2
>Compatibility</H2
><P
>   <TT
CLASS="COMMAND"
>ALTER VIEW</TT
> is a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
   extension of the SQL standard.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN58096"
></A
><H2
>See Also</H2
><A
HREF="sql-createview.html"
>CREATE VIEW</A
>, <A
HREF="sql-dropview.html"
>DROP VIEW</A
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