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Jun 30, 2019 in Spark Sql

Q: To implement a custom untyped user-defined aggregation function, the user has to extend the which class

(i)None of the options

(ii)UserDefinedAggregateFunction

(iii)UDFAggregateFunction

(iv)UserDefinedFunction

1 Answer

Jun 30, 2019

UserDefinedAggregateFunction 

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