hanging query for 2.5
---------------------

                 Key: CORE-5412
                 URL: http://tracker.firebirdsql.org/browse/CORE-5412
             Project: Firebird Core
          Issue Type: Bug
          Components: ISQL
    Affects Versions: 2.5.6
         Environment: Firebird Linux 2.5.2
            Reporter: Ray Holme


I was running a query looking for the range of a problem.

  select invoice_id, datetime from invoices
   where invoice_id in (select min(invoice_id) from invoice_lines where 
srv_order is null)
           or invoice_id in (select max(invoice_id) from invoice_lines where 
srv_order is null);

After returning the first row (min) the query hangs.

So I tried:

  select invoice_id, datetime from invoices
    where invoice_id in (select max(invoice_id) from invoice_lines where 
srv_order is null);

This too hangs and never retrurns (well I did not wait more than 1 minute).

But running this query returns results fine immediately.

  select max(invoice_id) from invoice_lines where srv_order is null;

and the following amended query works fine. ( supplying the min and max values) 
explicitly)

  select invoice_id, datetime from invoices where invoice_id in (5, 11284);

I could create a version of the DB for you. 
I do NOT believe you will need this as the problem is I(MHO) related to the 
select max hanging in a sub-query.

Note that this is an active DB (open by an inactive webapp - this should not 
matter, but ....)



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