RE: [EXT] Re: How can I detect an invalid date string in SQL? -- MIDRANGE-L

Unfortunately it doesn't look like DB2 has an TRY_CONVERT like Sql Server.

This worked for me. Not the most flexible but it works and can be altered in the future for you.

select storagedt, CASE WHEN REGEXP_LIKE(trim(TEST),'[\d][\d][\d][\d][-][\d][\d][-][\d][\d]') then dec(date(storagedt)) else 0 end as "as Decimal" from
mytable

That would only work for ISO character dates though.

Michael Salsman

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Mark Murphy
Sent: Wednesday, April 17, 2019 09:08
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: [EXT] Re: How can I detect an invalid date string in SQL?

Dave, works the same way! Eric, my data has invalid dates, Timestamp_format chokes on that. I have written my own UDF to validate the date string, then I can do this

case when IsValidDate(storagedt) = '1' then dec(date(storagedt)) else 0 end

On Wed, Apr 17, 2019 at 10:31 AM DeLong, Eric <EDeLong@xxxxxxxxxxxxxxx>
wrote:

Have you tried working with TIMESTAMP_FORMAT or TO_DATE?

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On Apr 17, 2019, at 9:14 AM, "dlclark@xxxxxxxxxxxxxxxx<mailto:
dlclark@xxxxxxxxxxxxxxxx>" <dlclark@xxxxxxxxxxxxxxxx<mailto:
dlclark@xxxxxxxxxxxxxxxx>> wrote:

CAUTION: EXTERNAL EMAIL

**********************************************************************
"MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxxxxxxxx<mailto:
midrange-l-bounces@xxxxxxxxxxxxxxxxxx>> wrote on 04/17/2019
09:36:22 AM:
In SQL, how can I detect a NULL returned by a function like DATE() or
DEC()?

This is my statement:

select storagedt, ifnull(dec(date(storagedt)), 0) as "as Decimal" from
mytable

What if you reversed that to the following?

dec(ifnull(date(storagedt), 0))

Sincerely,

Dave Clark
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