SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier y
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier t
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier tj
     TableJoin (children 1)
      Function and (children 1)
       ExpressionList (children 2)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier t.key1
          Identifier tj.key1
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier t.key2
          Identifier tj.key2
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier t.key1
 Identifier TSVWithNames
