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MQSeries.net Forum Index » General IBM MQ Support » Message set sequence issue while trying to restrict the len.

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dpu.gujjar
PostPosted: Wed Aug 22, 2018 5:46 am    Post subject: Message set sequence issue while trying to restrict the len. Reply with quote

Newbie

Joined: 22 Aug 2018
Posts: 4

I have designed message set as below
--> Choice
--->Sequence(1)
-->Value1
-->Value2
-->Value3
-->Value4

--->Sequence(2)
-->ValueX


The sequence 1 has group indicator /AB- & Data Pattern as /[A][B]-([^\r]|(\r[^\n])){8,11}\r?$\n. Ideally this sequence1 should not be picked if the length of the value if less than 8 or more than 11 and it should be assigned to Sequence2. But Sequence1 is not accepting valid value when used this data patteren, and it is accepted with pattern /[A][B]-([^\r]|(\r[^\n]))* and invalid scenario more than 11 is also accepted with this.

Can someone please tell me where I am going wrong
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dpu.gujjar
PostPosted: Thu Aug 23, 2018 7:38 am    Post subject: Reply with quote

Newbie

Joined: 22 Aug 2018
Posts: 4

below is more simplified question,

why sequence is not restricting the length when regular expression [A-Z]{8} is used in pattern, the sequence is accepting the data that has more than 8 characters which is abruptly stopping the processing of the message set
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Vitor
PostPosted: Thu Aug 23, 2018 7:49 am    Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

dpu.gujjar wrote:
below is more simplified question,

why sequence is not restricting the length when regular expression [A-Z]{8} is used in pattern, the sequence is accepting the data that has more than 8 characters which is abruptly stopping the processing of the message set


Well a sequence is just a set of DFDL fields, but a field with a pattern of [A-Z]{8} will attempt to match that. If it's presented with a field which doesn't match that pattern, it fails (as you've discovered).

So it will "restrict" the field to values which match the pattern but it will not "restrict" the values by making them conform - how could it? If it's faced with 11 lower case letters it could truncate & fold to upper case but what could it do with 8 digits? or 11 digits?
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Vitor
PostPosted: Thu Aug 23, 2018 7:51 am    Post subject: Re: Message set sequence issue while trying to restrict the Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA

dpu.gujjar wrote:
The sequence 1 has group indicator /AB- & Data Pattern as /[A][B]-([^\r]|(\r[^\n])){8,11}\r?$\n. Ideally this sequence1 should not be picked if the length of the value if less than 8 or more than 11 and it should be assigned to Sequence2.


It also looks like you're trying to validate the 4 child fields of sequence one in a single pattern.

I don't think that's a good idea, even if it works.
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