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I had the same issue and solved that with creating a view and adding some size checks for array columns like this one:
IF(CARDINALITY(my_array_column) = 0, NULL, my_array_column) AS my_array_column
con risposta 5 anni fa
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I am having the same problem but unfortunately the above suggestion does not work because it appears to happen with nested arrays as well which i cannot check the cardinality of and replace with null if empty without unnesting everything first (if that would even be possible due to multiple struct & array columns and levels of nesting).
con risposta 5 anni fa
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Admittedly responding to an old question, but a simple solution is to use ORC as format instead of PARQUET (format='ORC'), which doesn't have an issue with empty values.
con risposta 3 anni fa
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