Oracle-L: RE: How to avoid ora-1722 invalid number

From: Pardee, Roy E <roy.e.pardee_at_lmco.com>
Date: Tue, 06 Aug 2002 09:18:27 -0800
Message-ID: <F001.004AC4EA.20020806091827@fatcity.com>

Would it be feasible to strain out the '_' w/SUBSTR() or some such & then add a function-based index to the table? That way you could maybe avoid the FTS. I wonder if a materialized view couldn't be another alternative--screen out the rows w/values LIKE '%_%' & the do a to_number() on the column in the mv?

BTW, I'm assuming that you want to disregard the rows w/numbers that have '_'s in them--is that right? Or do you want '1_0' to be considered as falling between say, '100' and '200'?

HTH,
-Roy

Roy Pardee
Programmer/Analyst
SWFPAC Lockheed Martin IT
Extension 8487

-----Original Message-----

Sent: Tuesday, August 06, 2002 9:49 AM
To: Multiple recipients of list ORACLE-L

Hi,

I have a table with a column defined as varchar. This field will always have numbers but some of them have underscores in the data which is also valid
data. I want to be able to query the table using a to_number() in the where clause. Obviously I am getting ora-1722.

I cannot apply clause to try to filter the '_' data out as it will do a FTS and apply to_number to that field anyway.

Any suggestions?

Thanks
Rick

SELCT *
FROM <table>
WHERE TO_NUMBER(<field>) BETWEEN 10 AND 10000;

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Author:
INET: Rick_Cale_at_teamhealth.com

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Author: Pardee, Roy E
INET: roy.e.pardee_at_lmco.com

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