Re: SQL code to find the longest line

[aec <cfuture@xxxxxxxxxxx>]

One thing, Erick, those SQL statements don't need to be run Execute 
Immediate, you get better performance just running the statement itself:

exec sql DROP ALIAS QTEMP/AA;
exec sql CREATE ALIAS QTEMP/AA FOR QTEMP/DISP(DISP);

But using embedded SQL, you need to "Select/Into/" some host variable. It has to return one row only, but your statement does that.

exec sql SELECT MAX( LENGTH( TRIM(DISP) ) ) INTO :MyVar FROM QTEMP/AA

Where after executed, MyVar should have the value of the length of the longest line.

 




On 10/23/12 7:48 PM, Erick Garske wrote:
> I have a SQLPRGLE program compiled to a target release of V5R4M0
> that works correctly in V7R1M0, but throws a SQL exception when
> processing the prepare statement. The purpose of the
> code is to simply find the longest line in the file.
>
> /       Eval cmdSQL = 'DROP ALIAS QTEMP/AA';
> /       exec sql Execute Immediate :cmdSQL;
> /
> /       Eval cmdSQL = 'CREATE ALIAS QTEMP/AA FOR QTEMP/DISP(DISP)';
> /       exec sql Execute Immediate :cmdSQL;
> /
> /       cmdSQL = 'SELECT MAX( LENGTH( TRIM(DISP) ) ) FROM QTEMP/AA';
> /       exec sql prepare s1 from :cmdSQL;
>
> SQL values after processing the prepare statement:
>
> sqlcod = 204
> sqlerm =
>      ....5...10...15...20...25...30...35...40...45...50...55...60
>     '  *ALL  *N  MEM                                             '
>     '          '
>
> Does anyone know if there is an issue with the above code?