SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Identifier t1.a (alias t1_a)
    Identifier t2.a
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier table1 (alias t1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier table2 (alias t2)
     TableJoin (children 1)
      Function and (children 1)
       ExpressionList (children 3)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier table1.a
          Identifier table2.a
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier t1.a
          Identifier t2.a
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier t1_a
          Identifier t2.a
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier all
