SelectWithUnionQuery (children 3)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Identifier key
    Function groupArray (children 1)
     ExpressionList (children 1)
      Function repeat (children 1)
       ExpressionList (children 2)
        Literal \'a\'
        Literal UInt64_200
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier data_01513
   ExpressionList (children 1)
    Identifier key
 Identifier Null
 Set
