1 files changed, 16 insertions, 5 deletions
diff --git a/doc/src/sgml/syntax.sgml b/doc/src/sgml/syntax.sgml
index 4b81b088823..8283e252582 100644
--- a/doc/src/sgml/syntax.sgml
+++ b/doc/src/sgml/syntax.sgml
@@ -2596,10 +2596,10 @@ SELECT concat_lower_or_upper('Hello', 'World');
 
     <para>
      In named notation, each argument's name is specified using
-     <literal>:=</literal> to separate it from the argument expression.
+     <literal>=></literal> to separate it from the argument expression.
      For example:
 <screen>
-SELECT concat_lower_or_upper(a := 'Hello', b := 'World');
+SELECT concat_lower_or_upper(a => 'Hello', b => 'World');
  concat_lower_or_upper 
 -----------------------
  hello world
@@ -2610,13 +2610,24 @@ SELECT concat_lower_or_upper(a := 'Hello', b := 'World');
      using named notation is that the arguments may be specified in any
      order, for example:
 <screen>
-SELECT concat_lower_or_upper(a := 'Hello', b := 'World', uppercase := true);
+SELECT concat_lower_or_upper(a => 'Hello', b => 'World', uppercase => true);
  concat_lower_or_upper 
 -----------------------
  HELLO WORLD
 (1 row)
 
-SELECT concat_lower_or_upper(a := 'Hello', uppercase := true, b := 'World');
+SELECT concat_lower_or_upper(a => 'Hello', uppercase => true, b => 'World');
+ concat_lower_or_upper 
+-----------------------
+ HELLO WORLD
+(1 row)
+</screen>
+    </para>
+
+    <para>
+      An older syntax based on ":=" is supported for backward compatibility:
+<screen>
+    SELECT concat_lower_or_upper(a := 'Hello', uppercase := true, b := 'World');
  concat_lower_or_upper 
 -----------------------
  HELLO WORLD
@@ -2638,7 +2649,7 @@ SELECT concat_lower_or_upper(a := 'Hello', uppercase := true, b := 'World');
     already mentioned, named arguments cannot precede positional arguments.
     For example:
 <screen>
-SELECT concat_lower_or_upper('Hello', 'World', uppercase := true);
+SELECT concat_lower_or_upper('Hello', 'World', uppercase => true);
  concat_lower_or_upper 
 -----------------------
  HELLO WORLD