|
1 | | -<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.405 2007/10/25 18:54:03 tgl Exp $ --> |
| 1 | +<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.406 2007/10/30 19:06:56 tgl Exp $ --> |
2 | 2 |
|
3 | 3 | <chapter id="functions"> |
4 | 4 | <title>Functions and Operators</title> |
@@ -9016,7 +9016,9 @@ SELECT NULLIF(value, '(none)') ... |
9016 | 9016 |
|
9017 | 9017 | <para> |
9018 | 9018 | Note that <function>GREATEST</> and <function>LEAST</> are not in |
9019 | | - the SQL standard, but are a common extension. |
| 9019 | + the SQL standard, but are a common extension. Some other databases |
| 9020 | + make them return NULL if any argument is NULL, rather than only when |
| 9021 | + all are NULL. |
9020 | 9022 | </para> |
9021 | 9023 | </sect2> |
9022 | 9024 | </sect1> |
|