granicus.if.org Git - postgresql/log

libpq++ cleanup from Vince Vielhaber

Make tree compilable (+WAL).

heap_close(rel, AccessShareLock);
^^^^^^^^^^^^^^^^^ need in

Update FAQ.

Addition of CmdTuples(). Wraps PQcmdTuples.

Vince Vielhaber

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<H1><A NAME="section-1">TODO list for PostgreSQL</A></H1>
Last updated: Tue Sep 28 00:34:21 EDT 1999


Current maintainer: Bruce Momjian (<A HREF="mailto:maillist@candle.pha.pa.us">maillist@candle.pha.pa.us</A>)


The most recent version of this document can be viewed at 
the PostgreSQL web site, <A HREF="http://www.PostgreSQL.org">http://www.PostgreSQL.org</A>.


A dash(-) marks changes that will appear in the next release.


Names in brackets "[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/"></A>]" indicate more detailed information is available in 
the directory pgsql/doc/TODO.detail/ under that name.

<H2><A NAME="section-1.1">RELIABILITY</A></H2>


RESOURCES

<UL>
 <LI> Elog() does not free all its memory(Jan)
 <LI> spinlock stuck problem when elog(FATAL) and elog(ERROR) inside bufmgr
 <LI> Recover or force failure when disk space is exhausted

</UL>

PARSER

<UL>
 <LI> Disallow inherited columns with the same name as new columns
 <LI> INSERT INTO ... SELECT with AS columns matching result columns problem
 <LI> SELECT pgclass FROM pgclass generates strange error
 <LI> Alter TABLE ADD COLUMN does not honor DEFAULT, add CONSTRAINT
 <LI> Do not allow bpchar column creation without length
 <LI> -Select a[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/1">1</A>] FROM test fails, it needs test.a[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/1">1</A>]
 <LI> -Array index references without table name cause problems [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/array">array</A>]
 <LI> Update table SET table.value = 3 fails(SQL standard says this is OK)
 <LI> Creating index of TIMESTAMP & RELTIME fails, or rename to DATETIME(Thomas)
 <LI> SELECT foo UNION SELECT foo is incorrectly simplified to SELECT foo
 <LI> -INSERT ... SELECT ... GROUP BY groups by target columns not source columns
 <LI> -CREATE TABLE test (a char(5) DEFAULT text '', b int4) fails on INSERT
 <LI> UNION with LIMIT fails
 <LI> Unique index on base column not honored on inserts from inherited table
 INSERT INTO inherit_table (uniqueindexcol) VALUES (dup) should fail
 [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/inherit">inherit</A>]
 <LI> CREATE TABLE x AS SELECT 1 UNION SELECT 2 fails
 <LI> CREATE TABLE test(col char(2) DEFAULT user) fails in length restriction
 <LI> mismatched types in CREATE TABLE ... DEFAULT causes problems [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/default">default</A>]
 <LI> SELECT ... UNION ... ORDER BY fails when sort expr not in result list
 <LI> Be smarter about promoting types when UNION merges different data types
 <LI> SELECT ... UNION ... GROUP BY fails if column types disagree
 <LI> redesign INSERT ... SELECT to have two levels of target list
 <LI> -select * from pg_class where oid in (0,-1)
 <LI> have INTERSECT/EXCEPT prevent duplicates unless ALL is specified
 <LI> prevent primary key of nine columns [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/primary">primary</A>]
 <LI> SELECT COUNT('asdf') FROM pg_class WHERE oid=12 crashes
 <LI> SELECT DISTINCT ON col1 col1 col2 FROM tab1 is broken [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/distinct">distinct</A>]
 <LI> -When using aggregates + GROUP BY, no rows in should yield no rows out

</UL>

VIEWS

<UL>
 <LI> Views containing aggregates sometimes fail(Jan)
 <LI> Views with spaces in view name fail when referenced

</UL>

MISC

<UL>
 <LI> User who can create databases can modify pg_database table
 <LI> Plpgsql does not handle quoted mixed-case identifiers
 <LI> Fix btree to give a useful elog when key > 1/2 (page - overhead)
 <LI> pg_dump should preserve primary key information
 <LI> plpgsql regression tests fail on BSD/OS

</UL>
<H2><A NAME="section-1.2">ENHANCEMENTS</A></H2>


URGENT

<UL>
 <LI> Add referential integrity(Jan?)[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/primary">primary</A>]
 <LI> Add OUTER joins, left and right[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/outer">outer</A>](Thomas, Bruce)
 <LI> Allow long tuples by chaining or auto-storing outside db (chaining,large objs)
 <LI> Eliminate limits on query length
 <LI> Fix memory leak for expressions?[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/memory">memory</A>](Tom?)
 <LI> -Fix memory leak for aggregates?

</UL>

ADMIN

<UL>
 <LI> Better interface for adding to pg_group
 <LI> More access control over who can create tables and access the database
 <LI> Test syslog functionality
 <LI> Allow elog() to return error codes, not just messages
 <LI> Allow international error message support and add error codes
 <LI> Generate postmaster pid file and remove flock/fcntl lock code [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/flock">flock</A>]
 <LI> Add ability to specifiy location of lock/socket files [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/flock">flock</A>]

</UL>

TYPES

<UL>
 <LI> Add BIT, BIT VARYING
 <LI> Nchar (as distinguished from ordinary varchar),
 <LI> Domain capability
 <LI> Add STDDEV/VARIANCE() function for standard deviation computation/variance
 <LI> Allow compression of large fields or a compressed field type
 <LI> Large objects
 <UL>
 <LI> Fix large object mapping scheme, own typeid or reltype(Peter)
 <LI> Allow large text type to use large objects(Peter)
 <LI> Not to stuff everything as files in a single directory, hash dirs
 <LI> Allow large object vacuuming
 <LI> Tables that start with xinv confused to be large objects
 </UL>
 <LI> Allow pg_descriptions when creating types, tables, columns, and functions
 <LI> Add IPv6 capability to INET/CIDR types
 <LI> Make a separate SERIAL type?
 <LI> Store binary-compatible type information in the system
 <LI> Allow user to define char1 column
 <LI> Add support for & operator
 <LI> Allow LOCALE on a per-column basis, default to ASCII
 <LI> Allow array on int8[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/"></A>]
 <LI> Allow nulls in arrays
 <LI> Allow arrays to be ORDER'ed
 <LI> Remove Money type, add money formatting for decimal type
 <LI> Declare typein/out functions in pg_proc with a special "C string" data type
 <LI> Add non-large-object binary field
 <LI> Add index on NUMERIC/DECIMAL type
 <LI> Make Absolutetime/Relativetime int4 because time_t can be int8 on some ports
 <LI> Functions returning sets don't really work right[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/function">function</A>]

</UL>

VIEWS

<UL>
 <LI> Allow DISTINCT on views
 <LI> Allow views of aggregate columns
 <LI> Allow views with subselects

</UL>

INDEXES

<UL>
 <LI> Allow CREATE INDEX zman_index ON test (date_trunc( 'day', zman ) datetime_ops)
 fails index can't store constant parameters
 <LI> Allow creation of functional indexes to use default types
 <LI> Permissions on indexes - prevent them?
 <LI> Allow SQL function indexes
 <LI> Add FILLFACTOR to index creation
 <LI> Allow indexing of LIKE with localle character sets
 <LI> Allow indexing of more than eight columns

</UL>

COMMANDS

<UL>
 <LI> ALTER TABLE ADD COLUMN to inherited table put column in wrong place [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/inherit">inherit</A>]
 <LI> Add ALTER TABLE DROP/ALTER COLUMN feature
 <LI> Allow CLUSTER on all tables at once, and improve CLUSTER, loses NOT

 NULL specification on table [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/cluster">cluster</A>]
 <LI> Add SIMILAR TO to allow character classes, 'pg_[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/a-c">a-c</A>]%'
 <LI> Auto-destroy sequence on DROP of table with SERIAL(Ryan)
 <LI> Allow LOCK TABLE tab1, tab2, tab3 so all tables locked in unison
 <LI> Allow INSERT/UPDATE of system-generated oid value for a row
 <LI> Allow ESCAPE '\' at the end of LIKE for ANSI compliance [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/like">like</A>]
 <LI> Rewrite the LIKE handling by rewriting the user string with the
 supplied ESCAPE [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/like">like</A>]
 <LI> -Move LIKE index optimization handling to the optimizer
 <LI> Allow RULE recompilation
 <LI> Support UNION/INTERSECT/EXCEPT in sub-selects
 <LI> Allow DELETE and UPDATE to use inheritance using tablename*

</UL>

CLIENTS

<UL>
 <LI> Make NULL's come out at the beginning or end depending on the
 ORDER BY direction
 <LI> Allow flag to control COPY input/output of NULLs
 <LI> Update reltuples from COPY command
 <LI> Allow psql \copy to allow delimiters
 <LI> Add a function to return the last inserted oid, for use in psql scripts
 <LI> Allow psql to print nulls as distinct from "" [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/null">null</A>]

</UL>

EXOTIC FEATURES

<UL>
 <LI> Add sql3 recursive unions
 <LI> Add the concept of dataspaces
 <LI> Add replication of distributed databases
 <LI> Allow queries across multiple databases

</UL>

MISC

<UL>
 <LI> Increase identifier length(NAMEDATALEN) if small performance hit
 <LI> Allow row re-use without vacuum(Vadim)
 <LI> Create a background process for each database that runs while
 database is idle, finding superceeded rows, gathering stats and vacuuming
 <LI> Add UNIQUE capability to non-btree indexes
 <LI> -Certain indexes will not shrink, i.e. oid indexes with many inserts
 <LI> Restore unused oid's on backend exit if no one else has gotten oids
 <LI> Have UPDATE/DELETE clean out indexes
 <LI> Allow WHERE restriction on ctid
 <LI> Allow cursors to be DECLAREd/OPENed/CLOSEed outside transactions
 <LI> Allow PQrequestCancel() to terminate when in waiting-for-lock state
 <LI> -Transaction log, so re-do log can be on a separate disk by
 with after-row images(Vadim) [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/logging">logging</A>]
 <LI> Populate backend status area and write program to dump status data
 <LI> Make oid use unsigned int more reliably, pg_atoi()
 <LI> Allow subqueries in target list
 <LI> Put sort files, large objects in their own directory
 <LI> Do autocommit so always in a transaction block(?)
 <LI> Show location of syntax error in query [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/yacc">yacc</A>]
 <LI> Redesign the function call interface to handle NULLs better [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/function">function</A>]
 <LI> Document/trigger/rule so changes to pgshadow recreate pgpwd [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/pg_shadow">pg_shadow</A>]
 <LI> Missing optimizer selectivities for date, r-tree, etc. [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/optimizer">optimizer</A>]
 <LI> Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup
 <LI> Overhaul bufmgr/lockmgr/transaction manager
 <LI> Add PL/Perl(Mark Hollomon)
 <LI> Make postgres user have a password by default
 <LI> Add configure test to check for C++ need for *.h and namespaces
 <LI> Allow BLCKSZ <= 64k, not <= 32k
 <LI> redesign UNION structures to have separarate target lists
 <LI> Allow multi-level query trees for INSERT INTO ... SELECT

</UL>
<H2><A NAME="section-1.3">PERFORMANCE</A></H2>


FSYNC

<UL>
 <LI> -Allow transaction commits with rollback with no-fsync performance [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/fsync">fsync</A>]
 <LI> -Prevent fsync in SELECT-only queries

</UL>

INDEXES

<UL>
 <LI> Use indexes in ORDER BY for restrictive data sets, min(), max()
 <LI> Pull requested data directly from indexes, bypassing heap data
 <LI> Use index to restrict rows returned by multi-key index when used with
 non-consecutive keys or OR clauses, so fewer heap accesses
 <LI> -Convert function(constant) into a constant for index use
 <LI> Allow LIMIT ability on single-table queries that have no ORDER BY to use
 a matching index [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/limit">limit</A>]
 <LI> Improve LIMIT processing by using index to limit rows processed [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/limit">limit</A>]
 <LI> Have optimizer take LIMIT into account when considering index scans [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/limit">limit</A>]
 <LI> Make index creation use psort code, because it is now faster(Vadim)
 <LI> Allow creation of sort temp tables > 1 Gig
 <LI> Create more system table indexes for faster cache lookups
 <LI> fix indexscan() so it does leak memory by not requiring caller to free
 <LI> Improve btbinsrch() to handle equal keys better, remove btfirsteq()(Tom)
 <LI> Allow SELECT * FROM tab WHERE int2col = 4 use int2col index, int8,
 float4, numeric/decimal too [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/optimizer">optimizer</A>]
 <LI> -Allow optimizer to prefer plans that match ORDER BY

</UL>

CACHE

<UL>
 <LI> Cache most recent query plan(s) [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/prepare">prepare</A>]
 <LI> Shared catalog cache, reduce lseek()'s by caching table size in shared area
 <LI> elog() flushes cache, try invalidating just entries from current xact,
 perhaps using invalidation cache

</UL>

MISC

<UL>
 <LI> Allow compression of log and meta data
 <LI> Allow char() not to use variable-sized header to reduce disk size
 <LI> Do async I/O to do better read-ahead of data
 <LI> -Fix memory exhaustion when using many OR's [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/cnfify">cnfify</A>]
 <LI> Get faster regex() code from Henry Spencer <<A HREF="mailto:henry@zoo.utoronto.ca">henry@zoo.utoronto.ca</A>>
 when it is available
 <LI> Use mmap() rather than SYSV shared memory(?)
 <LI> -Process const = const parts of OR clause in separate pass
 <LI> Make oid use oidin/oidout not int4in/int4out in pg_type.h
 <LI> Improve Subplan list handling
 <LI> Allow Subplans to use efficient joins(hash, merge) with upper variable
 [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/subquery">subquery</A>]
 <LI> use fmgr_info()/fmgr_faddr() instead of fmgr() calls in high-traffic
 places, like GROUP BY, UNIQUE, index processing, etc.
 <LI> improve dynamic memory allocation by introducing tuple-context memory
 allocation [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/memory">memory</A>]
 <LI> fix memory leak in cache code when non-existant table is referenced
 <LI> In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3
 <LI> pass atttypmod through parser in more cases [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/atttypmod">atttypmod</A>]
 <LI> remove duplicate type in/out functions for disk and net
 <LI> Allow persistent backends [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/persistent">persistent</A>]
 <LI> Misc [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/performance">performance</A>]

</UL>
<H2><A NAME="section-1.4">SOURCE CODE</A></H2>
<UL>
 <LI> Add use of 'const' for varibles in source tree
 <LI> Fix C optimizer problem where fmgr_ptr calls return different types [<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/alpha">alpha</A>]
 <LI> -Add needed includes and removed unneeded include files(Bruce)
 <LI> Make configure --enable-debug add -g on compile line
 <LI> Does Mariposa source contain any other bug fixes?
 <LI> Remove SET KSQO option if OR processing is improved(Tom)

</UL>
<HR>

<H3><A NAME="section-1.4.1">Developers who have claimed items are:</A></H3>
<UL>
 <LI> Billy is Billy G. Allie <<A HREF="mailto:Bill.Allie@mug.org">Bill.Allie@mug.org</A>>
 <LI> Brook is Brook Milligan <<A HREF="mailto:brook@trillium.NMSU.Edu">brook@trillium.NMSU.Edu</A>>
 <LI> Bruce is Bruce Momjian<<A HREF="mailto:maillist@candle.pha.pa.us">maillist@candle.pha.pa.us</A>>
 <LI> Bryan is Bryan Henderson<<A HREF="mailto:bryanh@giraffe.netgate.net">bryanh@giraffe.netgate.net</A>>
 <LI> D'Arcy is D'Arcy J.M. Cain <<A HREF="mailto:darcy@druid.net">darcy@druid.net</A>>
 <LI> David is David Hartwig <<A HREF="mailto:daveh@insightdist.com">daveh@insightdist.com</A>>
 <LI> Edmund is Edmund Mergl <<A HREF="mailto:E.Mergl@bawue.de">E.Mergl@bawue.de</A>>
 <LI> Goran is Goran Thyni <<A HREF="mailto:goran@kyla.kiruna.se">goran@kyla.kiruna.se</A>>
 <LI> Hiroshi is Hiroshi Inoue<<A HREF="mailto:Inoue@tpf.co.jp">Inoue@tpf.co.jp</A>>
 <LI> Jan is Jan Wieck <<A HREF="mailto:wieck@sapserv.debis.de">wieck@sapserv.debis.de</A>>
 <LI> Marc is Marc Fournier <<A HREF="mailto:scrappy@hub.org">scrappy@hub.org</A>>
 <LI> Massimo Dal Zotto <<A HREF="mailto:dz@cs.unitn.it">dz@cs.unitn.it</A>>
 <LI> Michael is Michael Meskes <<A HREF="mailto:meskes@postgresql.org">meskes@postgresql.org</A>>
 <LI> Oleg is Oleg Bartunov <<A HREF="mailto:oleg@sai.msu.su">oleg@sai.msu.su</A>>
 <LI> Peter is Peter T Mount <<A HREF="mailto:peter@retep.org.uk">peter@retep.org.uk</A>>
 <LI> Ryan is Ryan Bradetich <<A HREF="mailto:rbrad@hpb50023.boi.hp.com">rbrad@hpb50023.boi.hp.com</A>>
 <LI> Stefan Simkovics <<A HREF="mailto:ssimkovi@rainbow.studorg.tuwien.ac.at">ssimkovi@rainbow.studorg.tuwien.ac.at</A>>
 <LI> Tatsuo is Tatsuo Ishii <<A HREF="mailto:t-ishii@sra.co.jp">t-ishii@sra.co.jp</A>>
 <LI> Tom is Tom Lane <<A HREF="mailto:tgl@sss.pgh.pa.us">tgl@sss.pgh.pa.us</A>>
 <LI> Thomas is Thomas Lockhart <<A HREF="mailto:lockhart@alumni.caltech.edu">lockhart@alumni.caltech.edu</A>>
 <LI> TomH is Tom I Helbekkmo <<A HREF="mailto:tih@Hamartun.Priv.NO">tih@Hamartun.Priv.NO</A>>
 <LI> Vadim is "Vadim B. Mikheev" <<A HREF="mailto:vadim@krs.ru">vadim@krs.ru</A>>

</UL>

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   I have been working with user defined types and user defined c
functions.  One problem that I have encountered with the function
manager is that it does not allow the user to define type conversion
functions that convert between user types. For instance if mytype1,
mytype2, and mytype3 are three Postgresql user types, and if I wish to
define Postgresql conversion functions like

I run into problems, because the Postgresql dynamic loader would look
for a single link symbol, mytype3, for both pieces of object code.  If
I just change the name of one of the Postgresql functions (to make the
symbols distinct), the automatic type conversion that Postgresql uses,
for example, when matching operators to arguments no longer finds the
type conversion function.

The solution that I propose, and have implemented in the attatched
patch extends the CREATE FUNCTION syntax as follows. In the first case
above I use the link symbol mytype2_to_mytype3 for the link object
that implements the first conversion function, and define the
Postgresql operator with the following syntax

The patch includes changes to the parser to include the altered
syntax, changes to the ProcedureStmt node in nodes/parsenodes.h,
changes to commands/define.c to handle the extra information in the AS
clause, and changes to utils/fmgr/dfmgr.c that alter the way that the
dynamic loader figures out what link symbol to use.  I store the
string for the link symbol in the prosrc text attribute of the pg_proc
table which is currently unused in rows that reference dynamically
loaded
functions.

Bernie Frankpitt

Reverse out last scan.l patch for minus handling.\

Update TODO list.

Fix nodeAgg coredump in case where lower-level plan has
an empty targetlist *and* fails to return any tuples, as will happen
for example with 'SELECT COUNT(1) FROM table WHERE ...' if the where-
clause selects no tuples. It's so nice to make a fix by diking out code,
instead of adding more...

Update NT readme.

Sorry, guys. Here is the ultimate patch which keeps the entire
behavior as it was, apart from forbidding minus-terminated
operators. Seems that I have to break the habit of doing before
thinking properly :-/ The point is that my second patch breaks
constructs like a & b or a ! b. This patch is to be applied
instead of any of two other today's patches.

Leon

Irix fix from Mark Dalphin

Massimo's SET FSYNC and SHOW PG_OPTIONS changes, without SET QUERY_LIMIT.

Apply contrib patch from Massimo

Cancel query support from Massimo

Update TODO list.

Update README.NT

Following advice from Michael Ansley, I broke up the patch in
two: one fixes uminus and other literal length. They are to be
applied - uminus first, then possilbly literal on top of uminus.

Leon

Hello,

Two patches included:
- the first one enables the use of bool variables in fields which might
become NULL.
Up to now the lib told you that NULL is not a bool variable, even if
you provide a indicator.

- the second patch checks whether a value is null and issues an error if
no indicator is provided.

Sidenote: IIRC, the variable should be left alone if the value is NULL.
ECPGlib sets it's value to 0 on NULL. Is this a violation of the
standard?

Regards
Christof

Update README.NT with patch.

Currently,only the first column of multi-column indices
is used to find start scan position of Indexscan-s.

To speed up finding scan start position,I have changed
_bt_first() to use as many keys as possible.

I'll attach the patch here.

Regards.

Hiroshi Inoue

Emit warning on SELECT pg_language.*

Update TODO list.

Fix to give super user and createdb user proper update catalog rights.

Transaction log manager core code.
It doesn't work currently but also don't break anything -:)

Update TODO list.

*** empty log message ***

New Solaris FAQ.

Update TODO list.

Add README.SSL

Lots of patches coming in from me today :-)

When drawing up a very simple "text-drawing" of how the negotiation is done,
I realised I had done this last part (fallback) in a very stupid way. Patch
#4 fixes this, and does it in a much better way.

Included is also the simple text-drawing of how the negotiation is done.

//Magnus

Add bsdi sparc port.

Modify nodeAgg.c so that no rows are returned for a GROUP BY
with no input rows, per pghackers discussions around 7/22/99.  Clean up
a bunch of ugly coding while at it; remove redundant re-lookup of
aggregate info at start of each new GROUP.  Arrange to pfree intermediate
values when they are pass-by-ref types, so that aggregates on pass-by-ref
types no longer eat memory.  This takes care of a couple of TODO items...

Implement constant-expression simplification per Bernard
Frankpitt, plus some improvements from yours truly. The simplifier depends
on the proiscachable field of pg_proc to tell it whether a function is
safe to pre-evaluate --- things like nextval() are not, for example.
Update pg_proc.h to contain reasonable cacheability information; as of
6.5.* hardly any functions were marked cacheable. I may have erred too
far in the other direction; see recent mail to pghackers for more info.
This update does not force an initdb, exactly, but you won't see much
benefit from the simplifier until you do one.

This is a patch for cygipc library provided by Yutaka Tanida.
This is necessary to prevent freezing in cygwin port.

Several changes here, not very related but touching some of the same files.
* Buffer refcount cleanup (per my "progress report" to pghackers, 9/22).
* Add links to backend PROC structs to sinval's array of per-backend info,
and use these links for routines that need to check the state of all
backends (rather than the slow, complicated search of the ShmemIndex
hashtable that was used before).  Add databaseOID to PROC structs.
* Use this to implement an interlock that prevents DESTROY DATABASE of
a database containing running backends.  (It's a little tricky to prevent
a concurrently-starting backend from getting in there, since the new
backend is not able to lock anything at the time it tries to look up
its database in pg_database.  My solution is to recheck that the DB is
OK at the end of InitPostgres.  It may not be a 100% solution, but it's
a lot better than no interlock at all...)
* In ALTER TABLE RENAME, flush buffers for the relation before doing the
rename of the physical files, to ensure we don't get failures later from
mdblindwrt().
* Update TRUNCATE patch so that it actually compiles against current
sources :-(.
You should do "make clean all" after pulling these changes.

Update TODO list.

One last missing quoting bug in pg_dump:
now that sequence names are properly quoted for field defaults, mixed
case sequence names are generated. These are properly quoted in the
CREATE SEQUENCE lines, but not in the SELECT nextval lines, as per
below:

CREATE SEQUENCE "Teams_TeamID_seq" start 10 increment 1 maxvalue
2147483647 minvalue 1 cache 1 ;
SELECT nextval ('Teams_TeamID_seq');

This needs to be:
SELECT nextval ('"Teams_TeamID_seq"');

Patch included below.
--
Ross J. Reedstrom, Ph.D., <reedstrm@rice.edu>

Update TODO list.

Fix for netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0
This is because (-1) << 32 is -1 (Only intel arc. has been checked)

Oleg Sharoiko

TRUNCATE command from Mike Mascari<mascarim@yahoo.com>

Add TRUNCATE command, with psql help and sgml additions.

Update TODO list.

I found the following useful - just a way of using PQgetisnull from
libpq++.

Patrick Welche

Update TODO list.

gram.y cleanup

values.h patch from Alex Howansky

Update TODO list.

last batch, I think...

fixing it more..

bring it all into -current again

try and fix things...

bring in missing files ... this isn't very clean, but :(

Make proper plpgsql non-externs.

Update pgaccess 0.98.

Update TODO.

Update TODO list.

Add TODO detail directory.

Define plpgsql_yylineno as non-extern somewhere for bsdi.

Remove incorrect 'Assert(targetList != NULL)'. An
INSERT ... DEFAULT VALUES statement does indeed have a null targetlist,
at least during parse and rewrite stages.

Fix CASE bug identified by Keith Parks: CASE didn't reliably
treat a NULL condition result as FALSE. Clean up some bogus comments
here and there, too.

Update regress test expected outputs for small changes in
error message wording, due to most cases of no-such-relation now being
detected in central heap_open code rather than on an ad-hoc basis.

Mega-commit to make heap_open/heap_openr/heap_close take an
additional argument specifying the kind of lock to acquire/release (or
'NoLock' to do no lock processing).  Ensure that all relations are locked
with some appropriate lock level before being examined --- this ensures
that relevant shared-inval messages have been processed and should prevent
problems caused by concurrent VACUUM.  Fix several bugs having to do with
mismatched increment/decrement of relation ref count and mismatched
heap_open/close (which amounts to the same thing).  A bogus ref count on
a relation doesn't matter much *unless* a SI Inval message happens to
arrive at the wrong time, which is probably why we got away with this
sloppiness for so long.  Repair missing grab of AccessExclusiveLock in
DROP TABLE, ALTER/RENAME TABLE, etc, as noted by Hiroshi.
Recommend 'make clean all' after pulling this update; I modified the
Relation struct layout slightly.
Will post further discussion to pghackers list shortly.

Update TODO list.

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Update TODO list.

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Update TODO list.

Changes made by Hiroshi Inoue and approved by Vadim.
See attached mail for more details.

-------------------------------------------------------------------
From: "Vadim Mikheev" <vadim@krs.ru>
To: "Hiroshi Inoue" <Inoue@tpf.co.jp>
References: <000201befa94$42fe04c0$2801007e@cadzone.tpf.co.jp>
Subject: Re: elog(ERROR) in vacuum
Date: Fri, 10 Sep 1999 10:27:10 +0900
Organization: OJSC Rostelecom (Krasnoyarsk)
Message-ID: <37D85E6E.5AFA126D@krs.ru>

Hiroshi Inoue wrote:
>
> Hello Vadim,
>
> I have a question about vacuum.
>
> VACUUM has a phase like commit which calls TransactionIdCommit().
> But if elog(ERROR) occured after that,the status of transaction is
> changed from XID_COMMIT to XID_ABORT.
>
> Seems to me this causes inconsistency.
> Shoudn't AbortTransaction() be changed not to call TransacionIdAbort()
> in case of vacuum.

You're right!
As usual -:)

Vadim

jdbc2real rule was in there twice. One of them should have been jdbc1real

Jens Glaser found that getPrimaryKeys() had a table called test hardwired
into it.

Some late patches from Jens Glaser (jens@jens.de). These upgrade the protocol
to version 2, and fixes ResultSetMetaData.getColumnDisplaySize().

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An abstract declaration for the close() method was missed out of the previous
commit to CVS.

Update from Andreas Zeugswetter <andreas.zeugswetter@telecom.at>
for v6.5.2 info.

Allow ISOLATION and LEVEL as column names. These are SQL92 reserved words
which do not need to be so for our parser. Apparently omitted earlier.

Patches for 6.5.2

Update TODO list.

Allow CASE statement to contain *only* untyped result clauses or nulls.
Almost worked before, but forgot one place to check.
Reported by Tatsuo Ishii.
Still does not do the right thing if inserting into a non-string target
column. Should look for a type coersion later, but doesn't.

Patch to cure O(N^2) behavior in libpq when reading a long
message under a kernel that only returns one packet per recv() call. This
didn't use to matter much, but it starts to get annoying with multi-megabyte
EXPLAIN VERBOSE responses...

Add solaris faq.

First cut at doing something reasonable with OR-of-ANDs WHERE
conditions. There are some pretty bogus heuristics in prepqual.c that
try to decide whether to output CNF or DNF format; they need to be replaced,
likely. Right now the code is probably too willing to choose DNF form,
which might hurt performance in some cases that used to work OK.
But at least we have a foundation to build on.

Make sure both SRCH_INC and SRCH_LIB are checked for existances and added to
the CPPFLAGS/LDFLAGS variables...

cygwin doesn't have an endian.h, but defines BYTE_ORDER in sys/param.h

Further improvements in cnfify: reduce amount of self-recursion
in or_normalize, remove detection of duplicate subexpressions (since it's
highly unlikely to be worth the amount of time it takes), and introduce
a dnfify() entry point so that unintelligible backwards logic in UNION
processing can be eliminated. This is just an intermediate step ---
next thing is to look at not forcing the qual into CNF form when it would
be better off in DNF form.

Eliminate query length limitation imposed by pg_client_to_server
and pg_server_to_client. Eliminate copy.c's restriction on the length
of a single attribute.

Eliminate token length assumption in scanstr().

Update protocol doc to emphasize that backend can return
arbitrarily long strings, and frontends should cope gracefully. Goes
along with long query and long error message changes...

Eliminate elog()'s hardwired limit on length of an error message.
This change seems necessary in conjunction with long queries, and it
cleans up some bogosity in connection with long EXPLAIN texts anyway.
Note that current libpq will accept any length error message (at least
until it runs out of memory); prior versions have a limit of 8K, but
will cleanly discard excess error text, so there shouldn't be any
big compatibility problems with old clients.