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| Mapping Node vs ESQL |
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| fitzcaraldo |
 Posted: Tue Oct 11, 2005 10:47 pm Post subject: Mapping Node vs ESQL |
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Voyager
Joined: 05 May 2003
Posts: 98
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We are starting a new WBIMB project that will use XML messages exclusively for which we have the XSDs.
In the past I have always done the message field mappings in raw ESQL and I was looking for opinions on whether it's worth using the Mapping node approach.
What are the advantages of the mapping node vs a line of ESQL? Is there anything other than the point and click convenience?
Is the lack of access to the Environment tree a problem? We use a function to read reference data into the Environment tree for use in the transformation flow and presumably this would no longer work.
I'd appreciate any thoughts. |
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| jefflowrey |
| Posted: Wed Oct 12, 2005 3:54 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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If you need to validate the content of the messages, you need to model them.
If you need to model them, you might as well use the Mapping nodes for the grunt work. Except that there may be a bit of a learning curve vs writing the ESQL yourself.
If you need to use the Environment tree... then you can't do the grunt work with the Mapping node, I guess.
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I am *not* the model of the modern major general. |
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| wschutz |
| Posted: Wed Oct 12, 2005 9:01 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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If your are dealy exclusively with XML transformations, you should have a look at the XMLTransformation node as well....
however, there is the same restriction wrt Environment, but again perhaps you can do all the mapping in the XMLTransformation node and then have a follow-on compute node to do the Environment setting stuff...
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-wayne |
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| fitzcaraldo |
| Posted: Wed Oct 12, 2005 9:07 pm Post subject: |
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Voyager
Joined: 05 May 2003
Posts: 98
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page 87 of the 'Developing Message Flow Applications' manual:
'Every mapping file has a single mapping procedure ...... These mapping procedures can also be called from ESQL..'
My reading of this is that I can create a mapping file that can subsequently (and independently) be called from a compute node. Is this correct? Has anyone done this? |
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