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Avoid an Assert failure if OuterUserId hasn't been set yet during 

AbortTransaction.  This can happen if a backend's InitPostgres transaction
fails (eg, because the given username is invalid).  Per Alvaro.
This commit is contained in:
Tom Lane 2005-08-17 22:14:34 +00:00
parent 63f850cd4d
commit f8d0a82bf9
3 changed files with 23 additions and 7 deletions
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8
src/backend/access/transam/xact.c
View File

@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.212 2005/08/08 19:17:22 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xact.c,v 1.213 2005/08/17 22:14:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1877,8 +1877,8 @@ AbortTransaction(void)
/*
* Reset user id which might have been changed transiently. We cannot
* use s->currentUser, but must get the session outer-level userid from
* miscinit.c.
* use s->currentUser, since it may not be set yet; instead rely on
* internal state of miscinit.c.
*
* (Note: it is not necessary to restore session authorization here
* because that can only be changed via GUC, and GUC will take care of
@ -1886,7 +1886,7 @@ AbortTransaction(void)
* DEFINER function could send control here with the wrong current
* userid.)
*/
SetUserId(GetOuterUserId());
AtAbort_UserId();
/*
* do abort processing

19
src/backend/utils/init/miscinit.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/init/miscinit.c,v 1.148 2005/07/31 17:19:19 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/init/miscinit.c,v 1.149 2005/08/17 22:14:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -286,7 +286,7 @@ make_absolute_path(const char *path)
* OuterUserId is the current user ID in effect at the "outer level" (outside
* any transaction or function). This is initially the same as SessionUserId,
* but can be changed by SET ROLE to any role that SessionUserId is a
* member of. We store this mainly so that AbortTransaction knows what to
* member of. We store this mainly so that AtAbort_UserId knows what to
* reset CurrentUserId to.
*
* CurrentUserId is the current effective user ID; this is the one to use
@ -496,6 +496,21 @@ InitializeSessionUserIdStandalone(void)
}
/*
* Reset effective userid during AbortTransaction
*
* This is essentially SetUserId(GetOuterUserId()), but without the Asserts.
* The reason is that if a backend's InitPostgres transaction fails (eg,
* because an invalid user name was given), we have to be able to get through
* AbortTransaction without asserting.
*/
void
AtAbort_UserId(void)
{
CurrentUserId = OuterUserId;
}
/*
* Change session auth ID while running
*

3
src/include/miscadmin.h
View File

@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.178 2005/07/25 22:12:34 tgl Exp $
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.179 2005/08/17 22:14:34 tgl Exp $
*
* NOTES
* some of the information in this file should be moved to other files.
@ -235,6 +235,7 @@ extern Oid GetOuterUserId(void);
extern Oid GetSessionUserId(void);
extern void InitializeSessionUserId(const char *rolename);
extern void InitializeSessionUserIdStandalone(void);
extern void AtAbort_UserId(void);
extern void SetSessionAuthorization(Oid userid, bool is_superuser);
extern Oid GetCurrentRoleId(void);
extern void SetCurrentRoleId(Oid roleid, bool is_superuser);