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How can I change column types in Spark SQL's DataFrame?
Suppose I'm doing something like: val df = sqlContext.load("com.databricks.spark.csv", Map("path" -> "cars.csv", "header" -> "true")) df.printSchema() root |-- year: string (nullable = true) |-- make: string (nullable = true) |-- model: string (nullable = true) |-- comment: string (nullable = true) |-- blank: string (nullable = true) df.show() year make model comment blank 2012 Tesla S No comment
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