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Left join of empty dataset

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tomas
Level 5
Left join of empty dataset
Hi,

I have a join recipe (left join) where one of the joined table is empty (it is calculated sucesfully but empty). The recipe fails with an ERROR that the input dataset is not ready. How to avoid this error?

Thanks
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1 Solution
Clément_Stenac
Dataiker
Dataiker
Was it computed by Impala ? If it was, unfortunately, a behavior of Impala is that if there are 0 output rows, it doesn't even create an empty file, which leads DSS to think that the dataset isn't ready. There is no workaround apart from changing the engine which computed the empty dataset.

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3 Replies
Clément_Stenac
Dataiker
Dataiker
Was it computed by Impala ? If it was, unfortunately, a behavior of Impala is that if there are 0 output rows, it doesn't even create an empty file, which leads DSS to think that the dataset isn't ready. There is no workaround apart from changing the engine which computed the empty dataset.

View solution in original post

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tomas
Level 5
Author
Yes it was.
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vic
Level 2

Is it the same reason why I have the same problem with a Hive recipe? no workarround possible?

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