InsertQuery   (children 2)
 Function file (children 1)
  ExpressionList (children 1)
   Literal \'02841.parquet\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Literal UInt64_42 (alias x)
