Locating row with invalid number from table with few million rows

Question

We need to query the a table or a view of same to obtain a id of type VARCHAR with bind value being NUMBER. Any attempts in this regard I try seem to result ORA-01722: invalid number. Once case is below here
SQL> select TEXT_ID FROM ATT_TABLE where to_number(TEXT_ID) = 9411956;
select TEXT_ID FROM ATT_TABLE where to_number(TEXT_ID) = 9411956
ERROR at line 1:
ORA-12801: error signaled in parallel query server P010
ORA-01722: invalid number
1. TEXT_ID column is meant to have numeric values in VARCHAR type. It is possible that some record / row is not complying. How can I locate the non-complying records ?
2. What would be a VIEW definition that would return only records with valid numeric data in TEXT_ID column.
Edited by: bonjonbovi on Feb 13, 2009 3:58 PM

Answer 1

Of course the regexp_like is really cpu expensive, but there's no other solution in your situation
The only way to differ numberic value from character, is REGEXP_LIKE function
But you can do it using PL/SQL
BEGIN
   FOR c IN (SELECT TO_NUMBER (ID) ID
               FROM test_number)
   LOOP
      DBMS_OUTPUT.put_line (c.ID);
   END LOOP;
EXCEPTION
   WHEN OTHERS
   THEN
      NULL;
END;