InsertQuery   (children 3)
 Function file (children 1)
  ExpressionList (children 1)
   Function concat (children 1)
    ExpressionList (children 2)
     Function currentDatabase (children 1)
      ExpressionList
     Literal \'_data_02313.avro\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 1)
     Function CAST (alias t) (children 1)
      ExpressionList (children 2)
       Function tuple (children 1)
        ExpressionList (children 2)
         Identifier number
         Literal \'String\'
       Literal \'Tuple(a UInt32, b String)\'
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_3
    Set
 Set
