对于大数据来说可能会很慢。最后一列也是字符串，因为它具有字符串管道字符“|”。
My PySpark DataFrame includes two fields of type ArrayType. >>>df DataFrame[id: string, tokens: array, bigrams: array] >>>df.take(1) [Row(id='ID1', tokens=['one', 'two', 'two'], bigrams=['one two', 'two two'])] My intention is to merge them and form a unified field of...
Picture from "Learning Spark" We can think offlatMap()as "flattening" the iterators returned to it, so that instead of ending up with an RDD of lists we have an RDD of the elements in those lists. In other words, aflatMap()flattens multiple arrays into one single array. Set operation...
Merge into a Delta table Show Table Version History Load a Delta Table by Version ID (Time Travel Query) Load a Delta Table by Timestamp (Time Travel Query) Compact a Delta Table Add custom metadata to a Delta table write Read custom Delta table metadata Spark Streaming Connect to Kafka ...
Merge into a Delta table Show Table Version History Load a Delta Table by Version ID (Time Travel Query) Load a Delta Table by Timestamp (Time Travel Query) Compact a Delta Table Add custom metadata to a Delta table write Read custom Delta table metadata Spark Streaming Connect to Kafka ...