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| author | Bruce Momjian <bruce@momjian.us> | 2011-12-01 09:17:51 -0500 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2011-12-01 09:17:51 -0500 |
| commit | ebbcba75b46699fe11e347e1250898ce7d01b6f2 (patch) | |
| tree | a30d2544ec65cfcc4576fe4ec1d3818056a02b5c /doc/src | |
| parent | bc9306f4c5e55042e20c8d8b308e573478f26e34 (diff) | |
| download | postgresql-ebbcba75b46699fe11e347e1250898ce7d01b6f2.tar.gz postgresql-ebbcba75b46699fe11e347e1250898ce7d01b6f2.zip | |
Add documentation mention that 7 != NULL also returns NULL.
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/func.sgml | 4 |
1 files 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> |