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Missing, null and empty string

  • September 16, 2016
  • 1 reply
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lazarlubomir
Contributor
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Hello, Im still thinking about differences between attribute status... I understand difference between empty string value of attribute and null value of attribute, but what does "missing" value of attribute really mean please?

Thank You so much for explain!

Best answer by david_r

Missing means that the attribute does not exist at all on that feature.

More info on FME null handling here: https://knowledge.safe.com/articles/21423/how-does-fme-handle-null-attribute-values.html

In short:

  • Empty – The attribute exists and has an empty string as its value.
  • Null – The attribute exists and has a value of null.
  • Missing – The attribute does not exist.
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    david_r
    Evangelist
    • david_rEvangelist
    • Best Answer
    • September 16, 2016

    Missing means that the attribute does not exist at all on that feature.

    More info on FME null handling here: https://knowledge.safe.com/articles/21423/how-does-fme-handle-null-attribute-values.html

    In short:

    • Empty – The attribute exists and has an empty string as its value.
    • Null – The attribute exists and has a value of null.
    • Missing – The attribute does not exist.

    Reply


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