InsertQuery   (children 2)
 Function s3 (children 1)
  ExpressionList (children 2)
   Identifier s3_conn
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier filename
     Literal \'test::03215_archive.csv\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Literal UInt64_1
