> But how we can resolve this situation without
> manual types casting?
SQLite version 3.6.23.1
Enter ".help" for instructions
Enter SQL statements terminated with a ";"
sqlite> create table t (n integer);
sqlite> create trigger tr before insert on t begin select raise(fail,
'Value must be positive') where typeof(new.n) != 'integer' or new.n <
0; end;
sqlite> insert into t values (5);
sqlite> insert into t values (-5);
Error: Value must be positive
sqlite> insert into t values ('-5');
Error: Value must be positive
sqlite> insert into t values ('5');
sqlite> insert into t values ('q');
Error: Value must be positive
sqlite> select n, typeof(n) from t;
5|integer
5|integer
sqlite>
Pavel
On Thu, Apr 29, 2010 at 9:25 AM, Alexey Pechnikov
<pechni...@mobigroup.ru> wrote:
> Yes, I did understand. But how we can resolve this situation without
> manual types casting? Now datatyping working correct only with manual
> casting but it's hard to use:
>
> sqlite> CREATE TABLE T2 (N INTEGER CHECK(TYPEOF(N) = 'integer'));
> sqlite> INSERT INTO T2 VALUES('5');
> Error: constraint failed
> sqlite> INSERT INTO T2 VALUES(CAST('5' AS INTEGER));
>
> 2010/4/29 Igor Tandetnik <itandet...@mvps.org>:
>> I wasn't proposing this as a solution. It was an experiment, an attempt to
>> illustrate what was going on. I though I made it clear - I even show that
>> negative values slip through this check ('q' would pass the original check,
>> too). I can only assume you haven't actually read my message before jumping
>> in to respond.
>
> --
> Best regards, Alexey Pechnikov.
> http://pechnikov.tel/
> _______________________________________________
> sqlite-users mailing list
> sqlite-users@sqlite.org
> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
>
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