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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Trailing skip count behaviour when a field is null

Trailing skip count behaviour when a field is null

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gpkssts

Posted: Thu Nov 24, 2005 8:10 am Post subject: Trailing skip count behaviour when a field is null

Novice

Joined: 22 Nov 2005
Posts: 10
Location: UK

I'm trying to use trailing skip count to skip over some bytes in a cwf message.

The message contains several types of fields. The app sending me timestamps doesn't always include the fractional second part. So I tried trailing skip count to skip over the last 7 bytes (the length is always right its just that some times it will be populated,sometimes not)

On the timestamp fields when data is present the skip works fine, but if the field is empty (as in just blanks) the skip count is throwing out of alignment the rest of the message.

I tried modelling the message without the skip and used a string of 7 bytes to follow the 19 byte timestamp and that worked fine.

Any ideas?

schofier

Posted: Thu Nov 24, 2005 9:13 am Post subject:

Novice

Joined: 10 Dec 2003
Posts: 14
Location: IBM Hursley

I'm assuming that you are using WBI-MB v5.

It looks like there is a problem (in v5) using trailing skip count and null values in CWF (i.e. 'null permitted' = true)

This problem has been fixed in WMB v6.

If you do not require the null handling support within the MRM, you could try deselecting the 'null permittted' property for this field. (You could also try this to confirm my theory !

)

schofier

Posted: Fri Nov 25, 2005 2:00 am Post subject:

Novice

Joined: 10 Dec 2003
Posts: 14
Location: IBM Hursley

Although if you do disable null handling for this field, you may well run into invalid date/time issues when your field contains only blanks (if you have defined this field to be a DateTime field rather than just a string).

gpkssts

Posted: Fri Nov 25, 2005 2:22 am Post subject:

Novice

Joined: 22 Nov 2005
Posts: 10
Location: UK

Spotted that one would cause me a problem!

Do you think there's likely to be a CSD for V5 with this in?

schofier

Posted: Mon Nov 28, 2005 1:52 am Post subject:

Novice

Joined: 10 Dec 2003
Posts: 14
Location: IBM Hursley

I don't think that there is currently a CSD for v5.0 with a fix for this issue.

I would recommend raising a PMR via the official IBM support channels.

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