SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier t2.x
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t1 (alias t0)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier t1 (alias t2)
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier t0.x
        Identifier t2.x
   ExpressionList (children 1)
    Identifier t0.x
