cvs add'd two files for the tprintf() patch...

From: Massimo Dal Zotto <dz@cs.unitn.it>

>       these patches define the UNLISTEN sql command. The code already
>       existed but it was unknown to the parser. Now it can be used
>       like the listen command.
>       You must make clean and delete gram.c and parser.h before make.

From: Massimo Dal Zotto <dz@cs.unitn.it>

> tprintf.patch
>
>       tprintf.patch
>
>       adds functions and macros which implement a conditional trace package
>       with the ability to change flags and numeric options of running
>       backends at runtime.
>       Options/flags can be specified in the command line and/or read from
>       the file pg_options in the data directory.

Massimo Dal Zotto <dz@cs.unitn.it>

> socket-flock.patch
>
>       use advisory locks to check if the unix socket can be deleted.
>       A running postmaster keeps a lock on that file. A starting
>       postmaster exits if the file exists and is locked, otherwise
>       it deletes the sockets and proceeds.
>       This avoid the need to remove manually the file after a postmaster
>       or system crash.
>       I don't know if flock is available on any system. If not we could
>       define a HAVE_FLOCK set by configure.

From: Massimo Dal Zotto <dz@cs.unitn.it>

> sinval.patch
>
>       fixes a problem in SI cache which causes table overflow if some
>       backend is idle for a long time while other backends keep adding
>       entries.
>       It uses the new signal handling implemented in tprintf.patch.
>       I have also increacasesed the max number of backends from 32 to 64
>       and the table size from 1000 to 5000.
>       I don't know if anybody is working on SI, but until another
>       solution is found this patch fixes the problem. I have received
>       messages from other people reporting the same problem which I
>       fixed many months ago.

missed adding a new include file

From: Massimo Dal Zotto <dz@cs.unitn.it>

> sequence.patch
>
>       adds the missing setval command to sequences. Owner of sequences
>       can now set the last value to any value between min and max
>       without recreating the sequence. This is useful after loading
>       data from external files.

From: Massimo Dal Zotto <dz@cs.unitn.it>

> ps-status.patch
>
>       macros for ps status, used by postgres.c and utility.c.
>       Unfortunately ps status is system dependent and the current
>       code doesn't work on linux. The use of macros confines system
>       dependency to into one file (ps-status.h). Users of other
>       operating systems should check this code and submit new macros.

From: Massimo Dal Zotto <dz@cs.unitn.it>

> pqpacket.patch
>
>       fixed indentation.

From: Massimo Dal Zotto <dz@cs.unitn.it>

lock.patch

        I have rewritten lock.c cleaning up the code and adding better
        assert checking I have also added some fields to the lock and
        xid tags for better support of user locks. There is also a new
        function which returns an array of pids owning a lock.
        I'm using this code from over six months and it works fine.

From: Massimo Dal Zotto <dz@cs.unitn.it>

config.patch

        remove old defines no more used in the code.

From: Massimo Dal Zotto <dz@cs.unitn.it>

assert.patch

        adds a switch to turn on/off the assert checking if enabled at compile
        time. You can now compile postgres with assert checking and disable it
        at runtime in a production environment.

(Mark or Bruce?) It fixes a problem when cpp gives a warning when
precompiling /dev/null like:  "/dev/null", line 1: 1506-229 (W)
File is empty.  This leads to a hangup when doing the description
load during initdb, since stderr also ends up in the global1.description
and local1_template1.description

stderr has to be redirected to /dev/null:

Andreas Zeugswetter

 statements:
 - the table definition with a default clause referencing the sequence;
 - a CREATE SEQUENCE statement;
 - a UNIQUE constraint, which expands into a CREATE INDEX statement.
This is not a perfect solution, since the sequence will remain even if
 the table is dropped. Also, there is no absolute protection on updating
 the sequence column.

 is_sequence in the ColumnDef structure.

 Had too many in some cases because there was already a routine
 taking care of it.

 Formerly came just after early exit from loop for command nodes,
 so missed some cases.

Add nextstep to similar template file

re-integrate nextstep dynloader functionality

From: Jacek Lasecki <jacek@sound.eti.pg.gda.pl>

From: Michael Meskes <meskes@online-club.de>

+
+ Fri Aug 14 12:44:21 CEST 1998
+
+       - Added EXEC SQL DEFINE statement
+       - Set version to 2.4.0
+
+ Tue Aug 18 09:24:15 CEST 1998
+
+       - Removed keyword IS from DEFINE statement
+       - Added latest changes from gram.y
+       - Removed duplicate symbols from preproc.y
+       - Initialize sqlca structure
+       - Added check for connection to ecpglib
+       - Set version to 2.4.1
+
+ Thu Aug 20 15:31:29 CEST 1998
+
+       - Cleaned up memory allocation in ecpglib.c
+       - Set library version to 2.6
+

From: Michael Meskes <meskes@online-club.de>

+
+ Fri Aug 14 12:44:21 CEST 1998
+
+       - Added EXEC SQL DEFINE statement
+       - Set version to 2.4.0
+
+ Tue Aug 18 09:24:15 CEST 1998
+
+       - Removed keyword IS from DEFINE statement
+       - Added latest changes from gram.y
+       - Removed duplicate symbols from preproc.y
+       - Initialize sqlca structure
+       - Added check for connection to ecpglib
+       - Set version to 2.4.1
+
+ Thu Aug 20 15:31:29 CEST 1998
+
+       - Cleaned up memory allocation in ecpglib.c
+       - Set library version to 2.6
+

From: Michael Meskes <meskes@online-club.de>

+
+ Fri Aug 14 12:44:21 CEST 1998
+
+       - Added EXEC SQL DEFINE statement
+       - Set version to 2.4.0
+
+ Tue Aug 18 09:24:15 CEST 1998
+
+       - Removed keyword IS from DEFINE statement
+       - Added latest changes from gram.y
+       - Removed duplicate symbols from preproc.y
+       - Initialize sqlca structure
+       - Added check for connection to ecpglib
+       - Set version to 2.4.1
+
+ Thu Aug 20 15:31:29 CEST 1998
+
+       - Cleaned up memory allocation in ecpglib.c
+       - Set library version to 2.6
+

Thanks. But patches for src/backend/catalog/Makefile seems missing
in the current source tree. Please apply attached patches.

It also includes some corrections to src/backend/util/mb/wchar.c.
-- Tatsuo Ishii t-ishii@sra.co.jp

rewrite system.  Restructure parse_target to make it easier to
understand.

int64 fix

[AC_MSG_RESULT(yes) AC_DEFINE(HAVE_LONG_INT_64)],

this line produces something like:

  echo "$ac_t""yes" 1>&6 cat >> confdefs.h <<\EOF

and would append garbage "yes cat" to confdefs.h. Of course the
result confdefs.h is not syntactically correct therefore following
tests using confdefs.h would all fail.  To avoid the problem, we
could switch the order of AC_MSG_RESULT and AC_DEFINE (see attached
patch). This happend on my LinuxPPC box.


Tatsuo Ishii t-ishii@sra.co.jp

    patch is applied:

	Rewrite rules on relation level work fine now.

	Event qualifications on insert/update/delete  rules  work
	fine now.

	I  added  the  new  keyword  OLD to reference the CURRENT
	tuple. CURRENT will be removed in 6.5.

	Update rules can  reference  NEW  and  OLD  in  the  rule
	qualification and the actions.

	Insert/update/delete rules on views can be established to
	let them behave like real tables.

	For  insert/update/delete  rules  multiple  actions   are
	supported  now.   The  actions  can also be surrounded by
	parantheses to make psql  happy.   Multiple  actions  are
	required if update to a view requires updates to multiple
	tables.

	Regular users  are  permitted  to  create/drop  rules  on
	tables     they     have     RULE     permissions     for
	(DefineQueryRewrite() is  now  able  to  get  around  the
	access  restrictions  on  pg_rewrite).  This enables view
	creation for regular users too. This  required  an  extra
	boolean  parameter  to  pg_parse_and_plan() that tells to
	set skipAcl on all rangetable entries  of  the  resulting
	queries.       There      is      a      new     function
	pg_exec_query_acl_override()  that  could  be   used   by
	backend utilities to use this facility.

	All rule actions (not only views) inherit the permissions
	of the event relations  owner.  Sample:  User  A  creates
	tables    T1    and    T2,   creates   rules   that   log
	INSERT/UPDATE/DELETE on T1 in T2 (like in the  regression
	tests  for rules I created) and grants ALL but RULE on T1
	to user B.  User B  can  now  fully  access  T1  and  the
	logging  happens  in  T2.  But user B cannot access T2 at
	all, only the rule actions can. And due to  missing  RULE
	permissions on T1, user B cannot disable logging.

	Rules  on  the  attribute  level are disabled (they don't
	work properly and since regular users are  now  permitted
	to create rules I decided to disable them).

	Rules  on  select  must have exactly one action that is a
	select (so select rules must be a view definition).

	UPDATE NEW/OLD rules  are  disabled  (still  broken,  but
	triggers can do it).

	There are two new system views (pg_rule and pg_view) that
	show the definition of the rules or views so the db admin
	can  see  what  the  users do. They use two new functions
	pg_get_ruledef() and pg_get_viewdef() that are  builtins.

	The functions pg_get_ruledef() and pg_get_viewdef() could
	be used to implement rule and view support in pg_dump.

	PostgreSQL is now the only database system I  know,  that
	has rewrite rules on the query level. All others (where I
	found a  rule  statement  at  all)  use  stored  database
	procedures  or  the  like  (triggers as we call them) for
	active rules (as some call them).

    Future of the rule system:

	The now disabled parts  of  the  rule  system  (attribute
	level,  multiple  actions on select and update new stuff)
	require a complete new rewrite handler from scratch.  The
	old one is too badly wired up.

	After  6.4  I'll  start to work on a new rewrite handler,
	that fully supports the attribute level  rules,  multiple
	actions on select and update new.  This will be available
	for 6.5 so we get full rewrite rule capabilities.

Jan