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| TDS Signed Packed Decimals |
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| sido |
 Posted: Mon Feb 02, 2004 4:17 pm Post subject: TDS Signed Packed Decimals |
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Novice
Joined: 02 Feb 2004
Posts: 23
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I am trying to have an Input TDS Message Set with Choice Type to determine which of 4 possible message types come in. Now, under each, I have to declare Signed Numbers that correspond to PIC S9(n) OR PIC S9(n) COMP-3. The sign comes appended to the last number of the Integer. In the TDS Tab, I can see the Sign Setting possible but not really the Packed Decimal Declaration. From what I see in the TDS tab, I need to know if there is a way of doing the following:
1) Telling the Broker that the number in question is a Packed Decimal
2) Having the option of saying the sign would be part of the last digit -
(I know this is possible in the CWF format) |
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| wooda |
| Posted: Tue Feb 03, 2004 1:28 am Post subject: |
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Master
Joined: 21 Nov 2003
Posts: 265
Location: UK
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In TDS you cannot model packed decimal nor can you model a sign included in the last digit.
TDS is a character format. All numerics are expected to be input in character form.
As you rightly say both these functions are available in CWF.
Is there a reason why CWF is not appropriate for your model ? |
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| wooda |
| Posted: Tue Feb 03, 2004 1:30 am Post subject: |
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Master
Joined: 21 Nov 2003
Posts: 265
Location: UK
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| btw. CWF performs better than than TDS. And therefore is the better option if your model can be modelled using CWF. |
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| sido |
| Posted: Tue Feb 03, 2004 10:01 am Post subject: |
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Novice
Joined: 02 Feb 2004
Posts: 23
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The reasons for using TDS are:
1) We have 4 types of messages coming into ONE queue
2) The message lengths are never the same as there are a lot of optional elements
3) We didnt want to have to parse the Message using a field in the Application Header.
Using TDS, I have defined a Compund Message Type 'Choice' which has my four possible structures under it. Each of these messages has a 1-byte Tag preceding the data which we use to determine which of the 4 possible messages it is. We are having the Host prefix this 1-byte to the data it was sending us earlier. I knew that the Choice Type was possible in CWF but I wanted to take advantage of the tag options in TDS. Furthermore, I was told that CWF has performance issues! |
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