InsertQuery   (children 2)
 Function file (children 1)
  ExpressionList (children 1)
   Literal \'u16.orc\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Function CAST (alias x) (children 1)
      ExpressionList (children 2)
       Function materialize (children 1)
        ExpressionList (children 1)
         Literal UInt64_32768
       Literal \'UInt16\'
