Looking at:
http://www.postgresql.org/docs/current/static/protocol-message-formats.html
Scrolling down to:
RowDescription (B)

One can see that postgres does submit the id of the column & table of each result field.

looking at the function parseMeta:
https://github.com/lib/pq/blob/master/conn.go#L1401
We ignore the 6 bytes that is the column & table id could we expose these Id's in the api somehow? Or would that be hinderd by go's sql package?