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

    the following to regress/sql/tests.

    If applying by hand note that the setup_... must run before
    the run_... (that I splitted these two was due to the errors
    that occured when creating rules and using them then in the
    same session - I'll post another fix for this later).

    BTW: the regression tests sanity_checks and alter_table fail
    now due to the remove of some indices and the oidint4 and
    oidname types. At least expectes should be set to the current
    results.

    Thanks.


Jan

if MULTIBYTE is not enabled. So be sure to run initdb.

o these patches are made against the latest source tree (after
Bruce's massive patch, I think) BTW, I noticed that after running
regression, the oid field of pg_type seems disappeared.

	regression=> select oid from pg_type; ERROR:  attribute
	'oid' not found

this happens after the constraints test. This occures with/without
my patches. strange...

o pg_database_mb.h, pg_class_mb.h, pg_attribute_mb.h are no longer
used, and shoud be removed.

o GetDatabaseInfo() in utils/misc/database.c removed (actually in
#ifdef 0). seems nobody uses.

t-ishii@sra.co.jp

is a working 64-bit-int type available.

In playing around with it on my machine, I found that gcc provides
perfectly fine support for "long long" arithmetic ... but sprintf()
and sscanf(), which are system-supplied, don't work :-(.  So the
autoconf test program does a cursory test on them too.

If we find that a lot of systems are like this, it might be worth
the trouble to implement binary<->ASCII conversion of int64 ourselves
rather than relying on sprintf/sscanf to handle the data type.

			regards, tom lane

    test isn't that complete up to now,  but  I  think  it  shows
    enough of the capabilities of the module.

    The  Makefile  assumes  it  is  located  in a directory under
    pgsql/src/pl.   Since   it   includes   Makefile.global   and
    Makefile.port  and doesn't use any own compiler/linker calls,
    it should build on most of our supported  platforms  (I  only
    tested  under Linux up to now).  It requires flex and bison I
    think. Maybe we should ship prepared gram.c etc. like for the
    main parser too?


Jan

usernames and passwords work correctly in both "password" and
"crypt" authorization mode.  NOTE: at least on my machine, it seems
that the crypt() routines ignore the part of the password beyond
8 characters, so there's no security gain from longer passwords in
crypt auth mode.  But they don't fail.

The login-related part of psql has apparently not been touched
since roughly the fall of Rome ;-).  It was going through huge
pushups to get around the lack of username/login parameters to
PQsetdb.  I don't know when PQsetdbLogin was added to libpq, but
it's there now ... so I was able to rip out quite a lot of crufty
code while I was at it.

It's possible that there are still bogus length limits on username
or password in some of the other PostgreSQL user interfaces besides
psql/libpq.  I will leave it to other folks to check that code.

			regards, tom lane

with the new support for asynchronous NOTIFY in libpgtcl.  With
the current sources, if the backend disconnects unexpectedly then
the tcl/tk application coredumps when control next reaches the idle
loop.  Oops.

			regards, tom lane

Here are additional patches for the UnixWare 7 port.

Summary of changes:

In pqcomm.h, use the SUN_LEN macro if it is defined to calculate
the size of the sockaddr_un structure.

In unixware.h, drop the use of the UNIXWARE macro.  Everything can
be handled with the USE_UNIVEL_CC and DISABLE_COMPLEX_MACRO macros.

In s_lock.h, remove the reference to the UNIXWARE macro (see above).

In the unixware template, add the YFLAGS:-d line.

In various makefile templates, add (or cleanup) unixware and univel
port specific information.

-- Billy G. Allie

no longer returns buffer pointer, can be gotten from scan;
	descriptor; bootstrap can create multi-key indexes;
pg_procname index now is multi-key index; oidint2, oidint4, oidname
are gone (must be removed from regression tests); use System Cache
rather than sequential scan in many places; heap_modifytuple no
longer takes buffer parameter; remove unused buffer parameter in
a few other functions; oid8 is not index-able; remove some use of
single-character variable names; cleanup Buffer variables usage
and scan descriptor looping; cleaned up allocation and freeing of
tuples; 18k lines of diff;

Fix for SNPRINTF test in configure

From: Tom Lane <tgl@sss.pgh.pa.us>

Add rule tests to regression tests...

From: Jan Wieck <jwieck@debis.com>

Hi,

    as  proposed here comes the first patch for the query rewrite
    system.

  <for details, see archive dated Mon, 17 Aug 1998>