Allow PATH in COPY TO to accept multiple expressions

COPY (

   SELECT VALUE c

   FROM Commerce.Customers c

   WHERE c.city IN ["Boston, MA", "Hanover, MA"]

) AS t

TO myS3Bucket AT myS3Link 

PATH ("commerce", state, zip) -- allow multiple expressions

OVER (

   PARTITION BY t.address.state AS state,

                t.address.zipcode AS zip

)

WITH { 

   "compression": "gzip"  

}