postgres.git / summary / log / commit / refs
commit ebbcba75b46699fe11e347e1250898ce7d01b6f2
Author: Bruce Momjian <bruce@momjian.us>
Date: Thu Dec 01 14:17:51 2011 +0000
Add documentation mention that 7 != NULL also returns NULL.
doc/src/sgml/func.sgml | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index be92e6acb32..ddfb29a4338 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -364,8 +364,8 @@
</indexterm>
Ordinary comparison operators yield null (signifying <quote>unknown</>),
not true or false, when either input is null. For example,
- <literal>7 = NULL</> yields null. When this behavior is not suitable,
- use the
+ <literal>7 = NULL</> yields null, as does <literal>7 <> NULL</>. When
+ this behavior is not suitable, use the
<literal>IS <optional> NOT </> DISTINCT FROM</literal> constructs:
<synopsis>
<replaceable>expression</replaceable> IS DISTINCT FROM <replaceable>expression</replaceable>
[parent: bc9306f4c5e5]