SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Literal UInt64_1
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t0 (alias tx)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier t0 (alias ty)
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier tx.c0
        Identifier ty.c0
