postgres

Commit Graph

Author	SHA1	Message	Date
Bruce Momjian	f29ccc8270	autoconf	27 years ago
Bruce Momjian	c70c4e367d	I hope this is what you had in mind: --enable-debug adds -g (unconditionally) --disable-debug removes -g (if it was already in there somehow) (giving neither does nothing) Since none of the templates default CFLAGS with a -g you're not likely to end up with two -g flags. Not that they'd hurt though. It doesn't do anything about C++. Peter Eisentraut	27 years ago
Bruce Momjian	48049b4ce3	Update TODO list.	27 years ago
Bruce Momjian	b65f3b089b	Update TODO list.	27 years ago
Tom Lane	b40ac42efb	Teach parse_coerce about non-cachable functions (actually, make it call eval_const_expressions() so that it doesn't have to know).	27 years ago
Tom Lane	6eb8d255d2	Allow CREATE FUNCTION's WITH clause to be used for all language types, not just C, so that ISCACHABLE attribute can be specified for user-defined functions. Get rid of ParamString node type, which wasn't actually being generated by gram.y anymore, even though define.c thought that was what it was getting. Clean up minor bug in dfmgr.c (premature heap_close).	27 years ago
Tom Lane	e23a2b1ea0	Document formerly-undocumented WITH clause of CREATE FUNCTION.	27 years ago
Tom Lane	1f122a7c4c	Replace float.c's #ifdef finite check with a proper autoconf check, so it works if finite() is a function. Patch from Christof Petig.	27 years ago
Tom Lane	54204e6c78	Stick finger into a couple more holes in the leaky dike of modifyAggrefQual. This routine really, really needs to be retired, but until we have subselects in FROM there's no chance of doing the job right. In the meantime try to respond to unhandlable cases with elog rather than coredump.	27 years ago
Tom Lane	fc43696d1a	Fix make_clause and make_opclause to record valid type info in the Expr nodes they produce. This fixes a few cases of errors like 'typeidTypeRelid: Invalid type - oid = 0' caused by calling parser-related routines on expression trees that have already been processed by planner- related routines.	27 years ago
Tom Lane	cd243d27ce	Revise rule-printing routines to use expandable StringInfo buffers, so that they have no hardwired limit on the length of a rule's text. Fix a couple of minor bugs in passing --- deparsed UPDATE queries didn't have quotes around relation name, and quotes and backslashes in constant values weren't backslash-quoted.	27 years ago
Bruce Momjian	4e9073855c	Update TODO list.	27 years ago
Thomas G. Lockhart	996c52beff	Refer to "name", rather than "table" as the replaceable parameter. Seems to read better this way...	27 years ago
Thomas G. Lockhart	f74179cd8e	Make a mention of the new TRUNCATE command.	27 years ago
Thomas G. Lockhart	66d17c3e26	Make TABLE an optional keyword, a la LOCK TABLE (gram.y fixes not yet committed, but will be within a week or two). Actually include the reference page into the docs...	27 years ago
Thomas G. Lockhart	03e5edb7e4	Add keywords from Jan's recent RI features.	27 years ago
Thomas G. Lockhart	b14a465131	Remove xref's to reference pages since they are not available in the Programmer's Guide.	27 years ago
Tom Lane	389af07cf0	Clean up rewriter routines to use expression_tree_walker and expression_tree_mutator rather than ad-hoc tree walking code. This shortens the code materially and fixes a fair number of sins of omission. Also, change modifyAggrefQual to not recurse into subselects, since its mission is satisfied if it removes aggregate functions from the top level of a WHERE clause. This cures problems with queries of the form SELECT ... WHERE x IN (SELECT ... HAVING something-using-an-aggregate), which would formerly get mucked up by modifyAggrefQual. The routine is still fundamentally broken, of course, but I don't think there's any way to get rid of it before we implement subselects in FROM ...	27 years ago
Jan Wieck	ce1f5ed547	Fixed opr_sanity regression test to ignore the new RI_FKey_... constrint triggers when looking for illegal pg_proc entries. Jan	27 years ago
Jan Wieck	ccecf1fa46	Added utils/adt/ri_triggers with empty shells for the FOREIGN KEY triggers. Added pg_proc entries for all the new functions. Jan	27 years ago
Jan Wieck	daaeafd9e1	Removed (useless) pg_proc_prosrc_index Jan	27 years ago
Tom Lane	2993f0c100	Reverse out getopt patch --- turns out it doesn't help on my platform, and there are at least some people it's not broken for. So undo change until we can discuss a more portable solution.	27 years ago
Tom Lane	1764d9579e	Un-break optarg() call --- some peoples' optarg libraries don't like extraneous colons in the option list...	27 years ago
Tom Lane	5fc889fbea	Hmm, guess I forgot to commit this file the other day ... just some cosmetic changes now, Vadim already fixed the heap_xxx calls.	27 years ago
Bruce Momjian	82b1f55239	Update TODO list.	27 years ago
Bruce Momjian	bdd6c0a61f	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <TITLE>PostgreSQL TODO list</TITLE> <BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#FF0000" VLINK="#A00000"\ ALINK="#0000FF"> <META NAME="generator" CONTENT="txt2html v1.25"> </HEAD> <BODY> <H1><A NAME="section-1">TODO list for PostgreSQL</A></H1> Last updated: Tue Sep 28 00:34:21 EDT 1999 <P> Current maintainer: Bruce Momjian (<A HREF="mailto:maillist@candle.pha.pa.us">maillist@candle.pha.pa.us</A>) <P> The most recent version of this document can be viewed at<BR> the PostgreSQL web site, <A HREF="http://www.PostgreSQL.org">http://www.PostgreSQL.org</A>. <P> A dash(-) marks changes that will appear in the next release. <P> Names in brackets "[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/"></A>]" indicate more detailed information is available in<BR> the directory pgsql/doc/TODO.detail/ under that name. <H2><A NAME="section-1.1">RELIABILITY</A></H2> <P> <STRONG>RESOURCES</STRONG> <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> <P> <STRONG>PARSER</STRONG> <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 pg<U>class FROM pg</U>class 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 (unique<U>index</U>col) 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> <P> <STRONG>VIEWS</STRONG> <UL> <LI> Views containing aggregates sometimes fail(Jan) <LI> Views with spaces in view name fail when referenced <LI> Creating view and inheriting the view causes view* to show duplicates(inherit) </UL> <P> <STRONG>MISC</STRONG> <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> <P> <STRONG>URGENT</STRONG> <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> <P> <STRONG>ADMIN</STRONG> <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> <P> <STRONG>TYPES</STRONG> <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> <P> <STRONG>VIEWS</STRONG> <UL> <LI> Allow DISTINCT on views <LI> Allow views of aggregate columns <LI> Allow views with subselects </UL> <P> <STRONG>INDEXES</STRONG> <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> <P> <STRONG>COMMANDS</STRONG> <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 <P> 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> <P> <STRONG>CLIENTS</STRONG> <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> <P> <STRONG>EXOTIC FEATURES</STRONG> <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> <P> <STRONG>MISC</STRONG> <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 pg<U>shadow recreate pg</U>pwd [<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> <P> <STRONG>FSYNC</STRONG> <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> <P> <STRONG>INDEXES</STRONG> <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 <U>bt</U>binsrch() to handle equal keys better, remove <U>bt</U>firsteq()(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> <P> <STRONG>CACHE</STRONG> <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> <P> <STRONG>MISC</STRONG> <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> </BODY> </HTML>	27 years ago
Jan Wieck	b5c4b77283	Added nbtree operator class for NUMERIC Jan	27 years ago
Bruce Momjian	a6528e08a5	Disable new FROM-clause warning.	27 years ago
Jan Wieck	1547ee017c	This is part #1 for of the DEFERRED CONSTRAINT TRIGGER support. Implements the CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands. TODO: Generic builtin trigger procedures Automatic execution of appropriate CREATE CONSTRAINT... at CREATE TABLE Support of new trigger type in pg_dump Swapping of huge # of events to disk Jan	27 years ago
Thomas G. Lockhart	d810338d29	Add a few items to the reserved keyword lists. Clarify information on implicitly-typed constants.	27 years ago
Thomas G. Lockhart	be18913532	Remove remnant garbage from former man pages.	27 years ago
Thomas G. Lockhart	fe2f878173	Fix (mis)information about NULLIF() SQL function. Thanks to Tom Lane for pointing it out.	27 years ago
Thomas G. Lockhart	f7e12db734	Strip out some cvs log info.	27 years ago
Bruce Momjian	cdd84ccd56	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <TITLE>PostgreSQL TODO list</TITLE> <BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#FF0000" VLINK="#A00000"\ ALINK="#0000FF"> <META NAME="generator" CONTENT="txt2html v1.25"> </HEAD> <BODY> <H1><A NAME="section-1">TODO list for PostgreSQL</A></H1> Last updated: Tue Sep 28 00:34:21 EDT 1999 <P> Current maintainer: Bruce Momjian (<A HREF="mailto:maillist@candle.pha.pa.us">maillist@candle.pha.pa.us</A>) <P> The most recent version of this document can be viewed at<BR> the PostgreSQL web site, <A HREF="http://www.PostgreSQL.org">http://www.PostgreSQL.org</A>. <P> A dash(-) marks changes that will appear in the next release. <P> Names in brackets "[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/"></A>]" indicate more detailed information is available in<BR> the directory pgsql/doc/TODO.detail/ under that name. <H2><A NAME="section-1.1">RELIABILITY</A></H2> <P> <STRONG>RESOURCES</STRONG> <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> <P> <STRONG>PARSER</STRONG> <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 pg<U>class FROM pg</U>class 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 (unique<U>index</U>col) 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> <P> <STRONG>VIEWS</STRONG> <UL> <LI> Views containing aggregates sometimes fail(Jan) <LI> Views with spaces in view name fail when referenced <LI> Creating view and inheriting the view causes view* to show duplicates(inherit) </UL> <P> <STRONG>MISC</STRONG> <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> <P> <STRONG>URGENT</STRONG> <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> <P> <STRONG>ADMIN</STRONG> <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> <P> <STRONG>TYPES</STRONG> <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> <P> <STRONG>VIEWS</STRONG> <UL> <LI> Allow DISTINCT on views <LI> Allow views of aggregate columns <LI> Allow views with subselects </UL> <P> <STRONG>INDEXES</STRONG> <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> <P> <STRONG>COMMANDS</STRONG> <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 <P> 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> <P> <STRONG>CLIENTS</STRONG> <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> <P> <STRONG>EXOTIC FEATURES</STRONG> <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> <P> <STRONG>MISC</STRONG> <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 pg<U>shadow recreate pg</U>pwd [<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> <P> <STRONG>FSYNC</STRONG> <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> <P> <STRONG>INDEXES</STRONG> <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 <U>bt</U>binsrch() to handle equal keys better, remove <U>bt</U>firsteq()(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> <P> <STRONG>CACHE</STRONG> <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> <P> <STRONG>MISC</STRONG> <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> </BODY> </HTML>	27 years ago
Bruce Momjian	008f354af4	Add mention of pg_upgrade for release checklist.	27 years ago
Bruce Momjian	692b83730b	Fix pg_upgrade so it vacuums all databases.	27 years ago
Bruce Momjian	008ef1de22	Add subquery mention in auto-create table entry.	27 years ago
Bruce Momjian	57d0ae5590	Fix for AIX dynaloader from Zeugswetter Andrea	27 years ago
Bruce Momjian	1e821d05f2	pg_upgrade reminder.	27 years ago
Bruce Momjian	165e2b6fb3	Recommend postmaster stop/start for pg_upgrade.	27 years ago
Bruce Momjian	8ccebab8bd	More cleanup for \| and ^.	27 years ago
Bruce Momjian	77bef41c7f	More cleanup for \| and ^.	27 years ago
Bruce Momjian	f44c7bad6c	Fix for creation of operator \|.	27 years ago
Bruce Momjian	35a2e62c5b	Update README.NT	27 years ago
Bruce Momjian	f282b4ff4c	libpq++ cleanup from Vince Vielhaber	27 years ago
Vadim B. Mikheev	3fea625e9d	Make tree compilable (+WAL).	27 years ago
Vadim B. Mikheev	539b6304b3	heap_close(rel, AccessShareLock); ^^^^^^^^^^^^^^^^^ need in	27 years ago
Bruce Momjian	9d5affaaf2	Update FAQ.	27 years ago
Bruce Momjian	5bb6bb8dd6	Addition of CmdTuples(). Wraps PQcmdTuples. Vince Vielhaber	27 years ago
Bruce Momjian	b89044b275	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <HTML> <HEAD> <TITLE>PostgreSQL TODO list</TITLE> <BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#FF0000" VLINK="#A00000"\ ALINK="#0000FF"> <META NAME="generator" CONTENT="txt2html v1.25"> </HEAD> <BODY> <H1><A NAME="section-1">TODO list for PostgreSQL</A></H1> Last updated: Tue Sep 28 00:34:21 EDT 1999 <P> Current maintainer: Bruce Momjian (<A HREF="mailto:maillist@candle.pha.pa.us">maillist@candle.pha.pa.us</A>) <P> The most recent version of this document can be viewed at<BR> the PostgreSQL web site, <A HREF="http://www.PostgreSQL.org">http://www.PostgreSQL.org</A>. <P> A dash(-) marks changes that will appear in the next release. <P> Names in brackets "[<A HREF="http://www.postgresql.org/docs/pgsql/doc/TODO.detail/"></A>]" indicate more detailed information is available in<BR> the directory pgsql/doc/TODO.detail/ under that name. <H2><A NAME="section-1.1">RELIABILITY</A></H2> <P> <STRONG>RESOURCES</STRONG> <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> <P> <STRONG>PARSER</STRONG> <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 pg<U>class FROM pg</U>class 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 (unique<U>index</U>col) 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> <P> <STRONG>VIEWS</STRONG> <UL> <LI> Views containing aggregates sometimes fail(Jan) <LI> Views with spaces in view name fail when referenced </UL> <P> <STRONG>MISC</STRONG> <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> <P> <STRONG>URGENT</STRONG> <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> <P> <STRONG>ADMIN</STRONG> <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> <P> <STRONG>TYPES</STRONG> <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> <P> <STRONG>VIEWS</STRONG> <UL> <LI> Allow DISTINCT on views <LI> Allow views of aggregate columns <LI> Allow views with subselects </UL> <P> <STRONG>INDEXES</STRONG> <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> <P> <STRONG>COMMANDS</STRONG> <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 <P> 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> <P> <STRONG>CLIENTS</STRONG> <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> <P> <STRONG>EXOTIC FEATURES</STRONG> <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> <P> <STRONG>MISC</STRONG> <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 pg<U>shadow recreate pg</U>pwd [<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> <P> <STRONG>FSYNC</STRONG> <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> <P> <STRONG>INDEXES</STRONG> <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 <U>bt</U>binsrch() to handle equal keys better, remove <U>bt</U>firsteq()(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> <P> <STRONG>CACHE</STRONG> <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> <P> <STRONG>MISC</STRONG> <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> </BODY> </HTML>	27 years ago

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