Before we make DataFrame non-alpha, it would be great to decide how we want
to namespace all the functions. There are 3 alternatives:
1. Put all in org.apache.spark.sql.functions. This is how SQL does it,
since SQL doesn't have namespaces. I estimate eventually we will have ~ 200
functions.
2. Have explicit namespaces, which is what master branch currently looks
like:
- org.apache.spark.sql.functions
- org.apache.spark.sql.mathfunctions
- ...
3. Have explicit namespaces, but restructure them slightly so everything is
under functions.
package object functions {
// all the old functions here -- but deprecated so we keep source
compatibility
def ...
}
package org.apache.spark.sql.functions
object mathFunc {
...
}
object basicFuncs {
...
}
