Where will this metadata be coming from? Beam SQL is tightly coupled with
the schema of the PCollection, so adding fields not in the data would be
If what you want is the timestamp out of the DoFn.ProcessContext we might
be able to add a SQL function to fetch that.
*From: *Reza Rokni <[EMAIL PROTECTED]>
*Date: *Tue, May 14, 2019, 1:08 AM
*To: * <[EMAIL PROTECTED]>