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Thread: Metadata Injection ETL execution from CDE

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  1. #1
    Join Date
    Mar 2016

    Default Metadata Injection ETL execution from CDE

    Hi everyone...

    So basically I have a situation where I have a table with dynamic columns I need to display via CDE.

    The table must show data for the current year (9 data columns + Total Column) and additionaly only totalized columns for the following years if there is data for said years.

    So I put together a couple of PDI ETLs, the first injects denormalization info (inject.ktr) into the second (denorm.ktr) in order to denormalize whatever years are available. (Based on the example in this thread)

    So in CDE I can upload both ETLs (inject and denorm) and select inject.ktr as the "Kettle Transformation File" to use as a datasource, but then I cannot specify a "Kettle Step name" from the denorm.ktr ETL. (I can... but it does not actually get data from it, it only gets data if I specify a "Kettle Step name" from the inject.ktr).

    So basically as I see it (without having seen any of the code) it seems to me in order to be able to do this I would have to be able to specify to CDE 3 items:

    1. the
    "Kettle Transformation File", which is the file it will run
    2. the "Kettle Step name" from which to get the data
    3. the Kettle Transformation File containing the "Kettle Step name" that will provide the data.

    Normally 1 and 3 are the same ktr, but with this schema, where you need two files it seems like I need to enter different file names.

    I can see in the tomcat/logs/pentaho.log that if I specity a "Kettle Step name" in the first ETL "inject.ktr" the steps in the "denorm.ktr" are also run, I just don't seem to be able to obtain the data from a step in the template etl "denorm.ktr" from CDE.

    Do you guys think this might be possible with CDE today? Am I missing something?

    Thank you in advance,
    Last edited by kahennig; 02-20-2017 at 11:24 AM.

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