RE: One last question

"dhotka@xxxxxxxxxxxxx" <dhotka@xxxxxxxxxxxxx> · Sat, 17 Jul 2004 15:15:26 -0400

Hi Jonathan,

One of the rows in the 'num' field has something other than a number in
it=2E=2E=2EI've seen this problem before=2E  My guess is you have more tha=
n just
numbers num field, and it is something higher than '9'=2E=2E=2Erun the que=
ry
without the to_number function and see what the data looks like=2E=2E=2Epe=
rhaps
spool it to a file for closer examination=2E

Dan

Original Message:
-----------------
From: Jonathan Gennick jonathan@gennick=2Ecom
Date: Fri, 16 Jul 2004 21:01:58 -0400
To: oracle-l@freelists=2Eorg
Subject: One last question

Wolfgang,

One last question, and then I'm done for the night=2E Here's
that query again:

SQL> SELECT *
  2  FROM ( SELECT flag, TO_NUMBER(num) num
  3         FROM subtest
  4         WHERE flag IN ('A', 'C') )
  5  WHERE num > 0;
ERROR:
ORA-01722: invalid number

How can I know whether it is "num > 0" that is causing the
error? Could it be that TO_NUMBER(num) is being evaluated
*before* the subquery's WHERE clause filters out rows NOT IN
('A', 'C')?

In other words, how can I know that the problem I'm seeing
is really the result of the two queries being merged?

Best regards,

Jonathan Gennick --- Brighten the corner where you are
http://Gennick=2Ecom * 906=2E387=2E1698 * mailto:jonathan@gennick=2Ecom

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