InsertQuery   (children 2)
 Identifier t2
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 3)
     Function rand (children 1)
      ExpressionList
     Literal UInt64_1
     Function concat (children 1)
      ExpressionList (children 2)
       Literal \'b\'
       Function toString (children 1)
        ExpressionList (children 1)
         Identifier number
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_100000
