InsertQuery   (children 3)
 Function file (children 1)
  ExpressionList (children 1)
   Identifier strings3_02735.parquet
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function toFixedString (children 1)
      ExpressionList (children 2)
       Literal \'up\'
       Literal UInt64_2
    Set
 Set
