Clarify NULLIF example

found by "Vesa-Matti J Kari" 

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index cbadf0f99a11e4f56d989cb3b963ba57421a61fb..b84f7d18dd73496850646921b297899287e45186 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,4 +1,4 @@
-
+
 
  
   Functions and Operators
@@ -9193,8 +9193,9 @@ SELECT NULLIF(value, '(none)') ...
 
   
   
-   If value1 is (none), return a null,
-   otherwise return value1.
+   In this example, if value is (none),
+   null is returned, otherwise the value of value
+   is returned.