On Oct 27, 2009, at 12:15 PM, Tom Sillence wrote:

> The documentation, http://sqlite.org/lang_expr.html suggests that "is"
> behaves like "=" except that "null is null" returns true. However in
> practice the sqlite sql parser won't accept the word "is" followed by
> anything other than "null" (oh and I suppose "not" as in "is not").
>
> sqlite> select 1 is 2;
> SQL error: near "2": syntax error
> sqlite> select 1 is null;
> 0
>
> It seems to me the documentation is wrong here. That said I'd much  
> rather
> the behaviour of sqlite changed to match the docs rather than vice- 
> versa
> because I really want to write neat queries like:
>
> select col1 is col2 from table
>

See the second bullet on http://www.sqlite.org/releaselog/3_6_19.html

This feature of the IS operator was added in version 3.6.19.  I  
suspect you are running an older version.

D. Richard Hipp
d...@hwaci.com



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