Commit 3df213fb authored by arjen@george.bitbike.com's avatar arjen@george.bitbike.com
Browse files

Clarification of legal database/table/column names. 

Clarification of NOW() behaviour.
parent 98cfa0e3

Docs/manual.texi

+7 −1
Original line number Diff line number Diff line
@@ -28310,7 +28310,9 @@ you must always quote it with @code{`} when you use it: 
mysql> SELECT * FROM `select` WHERE `select`.id > 100;

@end example













In previous versions of MySQL, the name rules are as follows:













@xref{Reserved words}.

























In MySQL versions prior to 3.23.6, the name rules are as follows:





























@itemize @bullet















@item










@@ -32604,6 +32606,10 @@ mysql> SELECT NOW() + 0;













        -> 19971215235026















@end example



























Note that @code{NOW()} is only evaluated once per query, namely at the













start of query execution. This means that multiple references to













@code{NOW()} within a single query will always give the same time.



























@findex UNIX_TIMESTAMP()















@item UNIX_TIMESTAMP()















@itemx UNIX_TIMESTAMP(date)