Tiny curiosity question on closing the jdbc connection

[Stephen Boesch]

Within its compute.close method, the JdbcRDD class has this interesting
logic for closing jdbc connection:


      try {
        if (null != conn && ! stmt.isClosed()) conn.close()
        logInfo("closed connection")
      } catch {
        case e: Exception => logWarning("Exception closing connection", e)
      }

Notice that the second check is on stmt  having been closed - not on the
connection.

I would wager this were not a simple oversight and there were some
motivation for this logic- curious if anyone would be able to shed some
light?   My particular interest is that I have written custom ORM's in jdbc
since late 90's  and never did it this way.