postgres

Commit Graph

Author	SHA1	Message	Date
Bruce Momjian	d07766fb50	Update TODO list.	27 years ago
Bruce Momjian	e16db38376	Clean up type descriptions.	27 years ago
Bruce Momjian	55fa71a9e9	Add S-tree doc for possible future use.	27 years ago
Bruce Momjian	2d12ee3f71	Update psql \? for \w.	27 years ago
Bruce Momjian	e3dd4942c7	Update for NUMERIC/DECIMAL data type.	27 years ago
Bruce Momjian	4fa0fd22a3	Update sgml.	27 years ago
Bruce Momjian	867d047372	Update for 6.5.3, including new INSTALL file and updated HISTORY.	27 years ago
Thomas G. Lockhart	5a2085392c	Fix bad markup. <term> not allowed in paragraphs; <option> is a better choice.	27 years ago
Thomas G. Lockhart	fac9e11878	Add DEC and SESSION_USER as reserved words. Move around a few other keywords which were not in the right category. DEC and SESSION_USER are not yet committed to gram.y, since I'm in the middle of working on JOIN syntax too.	27 years ago
Thomas G. Lockhart	757f832d18	Sequence of date interpretation not quite right.	27 years ago
Bruce Momjian	6da92d94bc	Update TODO list.	27 years ago
Thomas G. Lockhart	0cfd97ecf2	Remove rogue </book> tag left in from normalizing this chapter in emacs.	27 years ago
Thomas G. Lockhart	70320b5bf7	Repair markup for sgmltools writeup. Fix indenting and make other minor markup improvements.	27 years ago
Thomas G. Lockhart	fc32c709b4	Minor repairs of markup.	27 years ago
Bruce Momjian	ae61ef34bd	Cleanup -is flag to -l for SSL. Another PERL variable name fix. Clean up debugging options for postmaster and postgres programs. postmaster -d is no longer optional. Documentation updates.	27 years ago
Bruce Momjian	558833cadd	Add quotes to password example.	27 years ago
Bruce Momjian	c167863f3c	Update TODO list.	27 years ago
Bruce Momjian	9ee60db50e	Update TODO list.	27 years ago
Bruce Momjian	0eac2922ec	Update TODO list.	27 years ago
Bruce Momjian	86210e9d39	Update sgmltools install instructions.	27 years ago
Bruce Momjian	d71ef47a70	Update TODO list.	27 years ago
Bruce Momjian	dab3775329	Update sgmltools for docs.	27 years ago
Thomas G. Lockhart	ab35b0822b	Expunge "UNIX" in favor of "Unix". A few other changes, but I forget what :(	27 years ago
Thomas G. Lockhart	ee8d39a852	Add mention of transactions and large objects. Still need the code updated for LO examples.	27 years ago
Bruce Momjian	59844a65dd	Fix typo in sgml source.	27 years ago
Bruce Momjian	48049b4ce3	Update TODO list.	27 years ago
Bruce Momjian	b65f3b089b	Update TODO list.	27 years ago
Tom Lane	e23a2b1ea0	Document formerly-undocumented WITH clause of CREATE FUNCTION.	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
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
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	165e2b6fb3	Recommend postmaster stop/start for pg_upgrade.	27 years ago
Bruce Momjian	35a2e62c5b	Update README.NT	27 years ago
Bruce Momjian	9d5affaaf2	Update FAQ.	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
Bruce Momjian	9394d62c73	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	27 years ago
Bruce Momjian	63a85082e3	Reverse out last scan.l patch for minus handling.\	27 years ago
Bruce Momjian	bc0595f27f	Update TODO list.	27 years ago
Bruce Momjian	04f150e607	Update NT readme.	27 years ago
Bruce Momjian	d62a7ac6d3	Massimo's SET FSYNC and SHOW PG_OPTIONS changes, without SET QUERY_LIMIT.	27 years ago

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