SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 4)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier v1 (alias t1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier v1 (alias t2)
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier id
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier v2 (alias n1)
     TableJoin
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier v2 (alias n2)
     TableJoin
