diff options
Diffstat (limited to 'doc/src/sgml/ref/create_function.sgml')
| -rw-r--r-- | doc/src/sgml/ref/create_function.sgml | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/doc/src/sgml/ref/create_function.sgml b/doc/src/sgml/ref/create_function.sgml index 7e6d52c7dcf..863d99d1fc0 100644 --- a/doc/src/sgml/ref/create_function.sgml +++ b/doc/src/sgml/ref/create_function.sgml @@ -411,7 +411,9 @@ CREATE [ OR REPLACE ] FUNCTION is to be executed with the privileges of the user that calls it. That is the default. <literal>SECURITY DEFINER</literal> specifies that the function is to be executed with the - privileges of the user that owns it. + privileges of the user that owns it. For information on how to + write <literal>SECURITY DEFINER</literal> functions safely, + <link linkend="sql-createfunction-security">see below</link>. </para> <para> @@ -776,6 +778,11 @@ SELECT * FROM dup(42); <secondary>use in securing functions</secondary> </indexterm> + <indexterm> + <primary><varname>createrole_self_grant</varname> configuration parameter</primary> + <secondary>use in securing functions</secondary> + </indexterm> + <para> Because a <literal>SECURITY DEFINER</literal> function is executed with the privileges of the user that owns it, care is needed to @@ -815,11 +822,10 @@ $$ LANGUAGE plpgsql </para> <para> - Before <productname>PostgreSQL</productname> version 8.3, the - <literal>SET</literal> clause was not available, and so older functions may - contain rather complicated logic to save, set, and restore - <varname>search_path</varname>. The <literal>SET</literal> clause is far easier - to use for this purpose. + If the security definer function intends to create roles, and if it + is running as a non-superuser, <varname>createrole_self_grant</varname> + should also be set to a known value using the <literal>SET</literal> + clause. </para> <para> |