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creating a nested json output from a flat dataframe

0 Answers

0 Votes

370 Views

answered by

kunalm45 on Sep 26, '18

dataframe·udaf·groupby·nested json

GroupBy does not work very well in multiple partitions

0 Answers

0 Votes

55 Views

commented by

teresayan on Dec 14, '17

groupby

what are the alternatives for a Collect_set in Datasets for better performance ?

0 Answers

0 Votes

383 Views

edited by

panos on Dec 4, '17

spark sql·performance·dataset·groupby

Dataset groupby and udaf

0 Answers

0 Votes

150 Views

asked by

zhuangmz on Aug 1, '16

groupby·last·first

DF avg(count): double

3 Answers

0 Votes

158 Views

answered by

Kidus Mulugeta on Jul 29, '16

groupby·count·mean·aggregates

Spark 1.6.1 Dataset groupBy multiple columns, Row type not supported by encoder in mapGroups

0 Answers

0 Votes

1.7k Views

asked by

tmp123 on Jul 27, '16

sql·dataset·spark 1.6.1·groupby·encoder

12 Posts

9 Users

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dataset aggregates udaf mean spark sql count performance spark 1.6.1 encoder sql first last dataframe nested json

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