docs: improve CREATE FUNCTION docs about language case and quoting

Report from Marc Mamin
12 years ago · de4b6558be
parent 474cb24df7
commit de4b6558be
1 changed files with 3 additions and 3 deletions
--- a/doc/src/sgml/ref/create_function.sgml
+++ b/doc/src/sgml/ref/create_function.sgml
@ -252,10 +252,10 @@ CREATE [ OR REPLACE ] FUNCTION
     <listitem>
      <para>
       The name of the language that the function is implemented in.
-       Can be <literal>SQL</literal>, <literal>C</literal>,
+       It can be <literal>sql</literal>, <literal>c</literal>,
       <literal>internal</literal>, or the name of a user-defined
-       procedural language.  For backward compatibility,
-       the name can be enclosed by single quotes.
+       procedural language, e.g. <literal>plpgsql</literal>.  Enclosing the
+       name in single quotes is deprecated and requires matching case.
      </para>
     </listitem>
    </varlistentry>