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Older
current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
THE CHANGES FOR 6.1 APPEAR AT THE END OF THIS DOCUMENT
Developers who have claimed items are:
Bruce is Bruce Momjian<maillist@candle.pha.pa.us>
Bryan is Bryan Henderson<bryanh@giraffe.netgate.net>
Dan is Dan McGuirk <mcguirk@indirect.com>
Darren is Darren King <darrenk@insightdist.com>
Edmund is Edmund Mergl <E.Mergl@bawue.de>
Erich Stamberger <eberger@gewi.kfunigraz.ac.at>
Kurt is "Kurt J. Lidl" <lidl@va.pubnix.com>
Martin is Martin S. Utesch <utesch@aut.tu-freiberg.de>
Oleg is Oleg Bartunov <oleg@sai.msu.su>
Paul is Paul M. Aoki <aoki@CS.Berkeley.EDU>
Raymond is Raymond Toy <toy@rtp.ericsson.se>
Soo-Ho Ok <shok@detc.dongeui-tc.ac.kr>
Stefan Simkovics <ssimkovi@rainbow.studorg.tuwien.ac.at>
Sven is Sven Verdoolaege <skimo@breughel.ufsia.ac.be>
Vadim is "Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>
Vivek is Vivek Khera <khera@kci.kciLink.com>
-Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup(Erich)
-Overhaul bufmgr/lockmgr/transaction manager(Vadim)
remove -S (stable memory) option or fix memory manager
Fix CLUSTER
Fix compile and security of Kerberos/GSSAPI code (Daniel Kalchev?)
Dropping a table twice causes corruption, drop/create not rollback-able
SELECT on two tables where zero or one table in WHERE and target
COUNT on VIEW always returns zero (maybe because there is no oid for views?)
CREATE VIEW requires super-user priviledge
SELECT a[1] FROM test fails, it needs test.a[1]
INSERT INTO ... SELECT DISTINCT ... generates error on DISTINCT
pg_database.datdba is oid, should be int4
can lo_export()/lo_import() read/write anywhere, causing a security problem?
Fix UPDATE key_table SET keyval=max(reftab.NUM)+1 WHERE tblname='reftab'
Tables that start with xinv confused to be large objects
add subselects, possibility using temporary SQL functions
Implement HAVING clause
Implement EXISTS qualifier
column constraints (using rules), PRIMARY KEY during table creation
report "Not implemented" if valid syntax is supplied
add NOT NULL to CREATE statement
make VIEWs updateable where possible
add UNIONS, INTERSECTS, SUBTRACTS
add temporary tables
add assertions
add domains
add sql3 recursive unions
add the concept of dataspaces
Allow compression of large fields or a compressed field type
Replace table-level locking with row or page-level locking(Vadim)
Large objects
overwriting blocks has problems
there are other problems, too.
Fix large object mapping scheme
not to stuff everything as files in a single directory
Add support for tables >2G, or test current version
Incorporate the PERL PG95 interface library into source tree(Edmund)
Add other language types for built-in functions
expand to allow tcl, perl, java,
generalize the function manager switch to pass
function sources to interpreter engines.
remove time-travel feature(Vadim)
reduce system column overhead(Vadmin)
remove pg_time table(Vadim)
allow row re-use without vacuum, maybe?(Vadim)
can't vacuum large objects
Remove restriction that ORDER BY field must be in SELECT list(?)
Allow queries about owner of datbases, tables like:
SELECT u.usesysid FROM postgres.pg_user u;
Add word index for text fields, maybe with trigrams, i.e.:
' (cat | dog) & ! fox ' meaning text has cat or dog, but not fox
Allow readline-type or editor command editing of multi-line SQL commands
Populate backend status area and write program to dump status data
Add ALTER TABLE DROP COLUMN feature
Remove stale files upon startup(Vivek)
Add command to show privileges
Allow INSERT INTO ... SELECT to convert column types
Add syslog functionality
Improve optimizer plan choice(Darren)
Add STDDEV/VARIANCE() function for standard deviation computation/variance
add pg_type attribute to identify types that need length (bpchar, varchar)
add UNIQUE capability to non-btree indexes
make pg_dumpall preserve table ownership, not just database ownership
make large objects have their own reltype
make number of backends a config parameter, storage/sinvaladt.h:MaxBackendId
certain indexes will not shrink, i.e. oid indexes with many inserts
PERFORMANCE
-----------
Optimizing disjunctive queries
Other optimizer bugs
Is fsync use optimized?
Multi-representational types, a la Illustra. For example, have a
text type that is stored in-tuple when less than 8K and in large
objects, when greater than 8K.
Use indexes in ORDER BY
Profile engine in INSERT's and other operations
Cache most recent query plan(s?)
Allow compression of log and meta data
Allow LIKE/wildcard matches to use indexes if the wildcard character is not first
Change pg_attribute.attnvals name to attdispursion and change type float4
remove time-travel in documentation(Bruce)
added features used in grammer but not in docs, like :: and CAST
---------------------------------------------------------------------------
Bug Fixes
---------
packet length checking in library routines
lock manager priority patch
check for under/over flow of float8(Bruce)
multi-table join fix(Vadim)
SIGPIPE crash fix(Darren)
large object fixes(Sven)
allow btree indexes to handle NULLs(Vadim)
timezone fixes(D'Arcy)
select SUM(x) can return NULL on no rows(Thomas)
internal optimizer, executor bug fixes(Vadim)
fix problem where inner loop in < or <= has no rows(Vadim)
prevent re-commuting join index clauses(Vadim)
fix join clauses for multiple tables(Vadim)
fix hash, hashjoin for arrays(Vadim)
fix btree for abstime type(Vadim)
large object fixes(Raymond)
fix buffer leak in hash indices (Vadim)
fix rtree for use in inner scan (Vadim)
fix gist for use in inner scan, cleanups (Vadim, Andrea)
avoid unnecessary local buffers allocation (Vadim, Massimo)
fix local buffers leak in transaction aborts (Vadim)
fix file manager memmory leaks, cleanups (Vadim, Massimo)
fix storage manager memmory leaks (Vadim)
fix btree duplicates handling (Vadim)
fix deleted tuples re-incarnation caused by vacuum (Vadim)
fix SELECT varchar()/char() INTO TABLE made zero-length fields(Bruce)
many psql, pg_dump, and libpq memory leaks fixed using Purify (Igor)
Enhancements
------------
attribute optimization statistics(Bruce)
much faster new btree bulk load code(Paul)
BTREE UNIQUE added to bulk load code(Vadim)
new lock debug code(Massimo)
massive changes to libpg++(Leo)
new GEQO optimizer speeds table multi-table optimization(Martin)
new WARN message for non-unique insert into unique key(Marc)
update x=-3, no spaces, now valid(Bruce)
remove case-sensitive identifier handling(Bruce,Thomas,Dan)
debug backend now pretty-prints tree(Darren)
new Oracle character functions(Edmund)
new plaintext password functions(Dan)
no such class or insufficient privilege changed to distinct messages(Dan)
new ANSI timestamp function(Dan)
new ANSI Time and Date types (Thomas)
move large chunks of data in backend(Martin)
multi-column btree indexes(Vadim)
new SET var TO value command(Martin)
new locale settings for character types(Oleg)
new SEQUENCE serial number generator(Vadim)
GROUP BY function now possible(Vadim)
re-organize regression test(Thomas,Marc)
new optimizer operation weights(Vadim)
new psql \z grant/permit option(Marc)
tcp socket communication speed improved(Vadim)
new VACUUM option for attribute statistics, and for certain columns (Vadim)
many geometric type improvements(Thomas,Keith)
additional regression tests(Thomas)
more comparison operators for sorting types(Thomas)
new conversion functions(Thomas)
new more compact btree format(Vadim)
allow pg_dumpall to preserve database ownership(Bruce)
new SET GEQO=# and R_PLANS variable(Vadim)
old (!GEQO) optimizer can use right-sided plans (Vadim)
typechecking improvement in SQL parser(Bruce)
new SET, SHOW, RESET commands(Thomas,Vadim)
new \connect database USER option
new destroydb -i option (Igor)
new \dt and \di psql commands (Darren)
SELECT "\n" now escapes newline (A. Duursma)
new geometry conversion functions from old format (Thomas)
Source tree changes
-------------------
new configuration script(Marc)
readline configuration option added(Marc)
OS-specific configuration options removed(Marc)
new OS-specific template files(Marc)
no more need to edit Makefile.global(Marc)
re-arrange include files(Marc)
nextstep patches (Gregor Hoffleit)
removed WIN32-specific code(Bruce)
removed postmaster -e option, now only postgres -e option (Bruce)
merge duplicate library code in front/backends(Martin)
now works with eBones, international Kerberos(Jun)
more shared library support
c++ include file cleanup(Bruce)
warn about buggy flex(Bruce)