JDBC Dataframe Reader Doc Doesn't Match JDBC Data Source Page

https://spark.apache.org/docs/2.4.3/sql-data-sources-jdbc.html

Specifically in the partitionColumn section, this page says:

"partitionColumn must be a numeric, date, or timestamp column from the table in question."

But then in this doc: https://spark.apache.org/docs/2.4.3/api/scala/index.html#org.apache.spark.sql.DataFrameReader

in def jdbc(url: String, table: String, columnName: String, lowerBound: Long, upperBound: Long, numPartitions: Int, connectionProperties: Properties): DataFrame

we have:

columnName

the name of a column of integral type that will be used for partitioning.

This appears to go back pretty far, to 1.6.3, but I'm not sure when this was accurate.