* User management commands no longer user pg_exec_query_dest -> more robust

* Let unprivileged users change their own passwords.

* The password is now an Sconst in the parser, which better reflects its text datatype and also
forces users to quote them.

* If your password is NULL you won't be written to the password file, meaning you can't connect
until you have a password set up (if you use password authentication).

* When you drop a user that owns a database you get an error. The database is not gone.

src/backend/utils/misc/superuser.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/utils/misc/superuser.c,v 1.12 1999/11/24 16:52:45 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/utils/misc/superuser.c,v 1.13 2000/01/14 22:11:36 petere Exp $
  *
  * DESCRIPTION
  *	  See superuser().
@@ -18,6 +18,7 @@
 #include "postgres.h"
 #include "catalog/pg_shadow.h"
 #include "utils/syscache.h"
+#include "miscadmin.h"
 
 bool
 superuser(void)
@@ -26,12 +27,10 @@ superuser(void)
 	The Postgres user running this command has Postgres superuser
 	privileges.
 --------------------------------------------------------------------------*/
-	extern char *UserName;		/* defined in global.c */
-
 	HeapTuple	utup;
 
 	utup = SearchSysCacheTuple(SHADOWNAME,
-							   PointerGetDatum(UserName),
+							   PointerGetDatum(GetPgUserName()),
 							   0, 0, 0);
 	Assert(utup != NULL);
 	return ((Form_pg_shadow) GETSTRUCT(utup))->usesuper;