SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 5)
    Identifier operand
    Identifier low
    Identifier high
    Identifier count
    Function WIDTH_BUCKET (children 1)
     ExpressionList (children 4)
      Identifier operand
      Identifier low
      Identifier high
      Identifier count
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier mytable
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier count
     Literal UInt64_0
