From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Wed, 13 Nov 2013 18:26:33 +0000 (-0500)
Subject: Clarify CREATE FUNCTION documentation about handling of typmods.
X-Git-Tag: REL9_3_2~40
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a1c29c1fe153302c41c6c90815a5d73f2ceeb8a5;p=postgresql

Clarify CREATE FUNCTION documentation about handling of typmods.

The previous text was a bit misleading, as well as unnecessarily vague
about what information would be discarded.  Per gripe from Craig Skinner.
---

diff --git a/doc/src/sgml/ref/create_function.sgml b/doc/src/sgml/ref/create_function.sgml
index a679a853a9..81278bb2f8 100644
--- a/doc/src/sgml/ref/create_function.sgml
+++ b/doc/src/sgml/ref/create_function.sgml
@@ -579,12 +579,13 @@ CREATE FUNCTION foo(int, int default 42) ...
 
    <para>
     The full <acronym>SQL</acronym> type syntax is allowed for
-    input arguments and return value. However, some details of the
-    type specification (e.g., the precision field for
-    type <type>numeric</type>) are the responsibility of the
-    underlying function implementation and are silently swallowed
-    (i.e., not recognized or
-    enforced) by the <command>CREATE FUNCTION</command> command.
+    declaring a function's arguments and return value.  However,
+    parenthesized type modifiers (e.g., the precision field for
+    type <type>numeric</type>) are discarded by <command>CREATE FUNCTION</>.
+    Thus for example
+    <literal>CREATE FUNCTION foo (varchar(10)) ...</>
+    is exactly the same as
+    <literal>CREATE FUNCTION foo (varchar) ...</>.
    </para>
 
    <para>