*** pgsql/contrib/pgstattuple/pgstattuple.c	2005/10/15 02:49:06	1.20
--- pgsql/contrib/pgstattuple/pgstattuple.c	2009/03/31 22:56:05	1.20.2.1
***************
*** 1,5 ****
  /*
!  * $PostgreSQL: pgsql/contrib/pgstattuple/pgstattuple.c,v 1.19 2005/05/30 23:09:06 tgl Exp $
   *
   * Copyright (c) 2001,2002	Tatsuo Ishii
   *
--- 1,5 ----
  /*
!  * $PostgreSQL: pgsql/contrib/pgstattuple/pgstattuple.c,v 1.20 2005/10/15 02:49:06 momjian Exp $
   *
   * Copyright (c) 2001,2002	Tatsuo Ishii
   *
*************** pgstattuple_real(Relation rel, FunctionC
*** 115,120 ****
--- 115,130 ----
  	int			i;
  	Datum		result;
  
+ 	/*
+ 	 * Reject attempts to read non-local temporary relations; we would
+ 	 * be likely to get wrong data since we have no visibility into the
+ 	 * owning session's local buffers.
+ 	 */
+ 	if (isOtherTempNamespace(RelationGetNamespace(rel)))
+ 		ereport(ERROR,
+ 				(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ 				 errmsg("cannot access temporary tables of other sessions")));
+ 
  	/* Build a tuple descriptor for our result type */
  	if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
  		elog(ERROR, "return type must be a row type");