SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier bx
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier ax
     TableJoin
   Function and (children 1)
    ExpressionList (children 2)
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier ax.A
       Identifier bx.A
     Function in (children 1)
      ExpressionList (children 2)
       Identifier ax.B
       Literal Tuple_(UInt64_1, UInt64_2)
