Read the Schema of a Spark DataFrame
Read the schema of a Spark DataFrame.
list, with each
list element describing the
type of a column.
type column returned gives the string representation of the
underlying Spark type for that column; for example, a vector of numeric
values would be returned with the type
"DoubleType". Please see the
Spark Scala API Documentation
for information on what types are available and exposed by Spark.