mirror of https://github.com/postgres/postgres
Update HISTORY file for 7.0.
This commit is contained in:
Bruce Momjian
parent
5ca8eb9216
commit
b508136d81
153
HISTORY
153
HISTORY
|
|
@ -1,56 +1,41 @@
|
|||
|
||||
Chapter 0. Release Notes
|
||||
|
||||
Table of Contents
|
||||
Release 7.0
|
||||
Release 6.5.3
|
||||
Release 6.5.2
|
||||
Release 6.5.1
|
||||
Release 6.5
|
||||
Release 6.4.2
|
||||
Release 6.4.1
|
||||
Release 6.4
|
||||
Release 6.3.2
|
||||
Release 6.3.1
|
||||
Release 6.3
|
||||
Release 6.2.1
|
||||
Release 6.2
|
||||
Release 6.1.1
|
||||
Release 6.1
|
||||
Release v6.0
|
||||
Release v1.09
|
||||
Release v1.02
|
||||
Release v1.01
|
||||
Release v1.0
|
||||
Postgres95 Beta 0.03
|
||||
Postgres95 Beta 0.02
|
||||
Postgres95 Beta 0.01
|
||||
Timing Results
|
||||
|
||||
------------------------------------------------------------------------
|
||||
Release Notes
|
||||
------------------------------------------------------------------------
|
||||
|
||||
Release 7.0
|
||||
-----------
|
||||
|
||||
This release shows the continued growth of PostgreSQL. There are more
|
||||
updated items in 7.0 than in any previous release. Don't be concerned
|
||||
this is a dot-zero release. PostgreSQL does its best to put
|
||||
out only solid releases, and this one is no exception.
|
||||
|
||||
This release shows the continued growth of PostgreSQL. There are more
|
||||
changes in 7.0 than in any previous release. Don't be concerned this
|
||||
is a dot-zero release. We do our best to put out only solid releases,
|
||||
and this one is no exception.
|
||||
|
||||
Major changes in this release:
|
||||
|
||||
Foreign Keys
|
||||
Foreign keys are now implemented, with the exception of PARTIAL
|
||||
MATCH foreign keys. Many users have been asking for this
|
||||
feature, and we are pleased to offer it.
|
||||
|
||||
Optimizer Overhaul
|
||||
Continuing on work started a year ago, the optimizer has been
|
||||
overhauled, allowing improved query execution and better
|
||||
performance with less memory usage.
|
||||
|
||||
Updated psql
|
||||
psql, our interactive terminal monitor, has been updated with a
|
||||
variety of new features. See the psql manual page for details.
|
||||
|
||||
Upcoming Features
|
||||
In 7.1, we plan to have outer joins, storage for very long
|
||||
rows, and a write-ahead logging system.
|
||||
|
||||
Migration to v7.0
|
||||
|
||||
Foreign Keys: Foreign keys are now implemented, with the exception of
|
||||
PARTIAL MATCH foreign keys. Many users have been asking for this
|
||||
feature, and we are pleased to finally offer it.
|
||||
|
||||
Optimizer Overhaul: Continuing on work started a year ago, the
|
||||
optimizer has been overhauled in many significant ways, allowing better
|
||||
query execution processing with faster performance and less memory
|
||||
usage.
|
||||
|
||||
Updated psql: psql, our interactive terminal monitor, has been updated,
|
||||
with a variety of new features. See the psql manual page for the details.
|
||||
|
||||
Upcoming Features: In 7.1, we plan to have outer joins, storage for very long
|
||||
rows, and a write-ahead logging system.
|
||||
A dump/restore using pg_dump is required for those wishing to migrate
|
||||
data from any previous release. For those upgrading from 6.5.*, you
|
||||
can use pg_upgrade to upgrade to this release.
|
||||
|
||||
Detailed Change List
|
||||
|
||||
Bug Fixes
|
||||
---------
|
||||
|
|
@ -58,7 +43,6 @@ Prevent function calls with more than maximum number of arguments (Tom)
|
|||
Many fixes for CASE (Tom)
|
||||
Fix SELECT coalesce(f1,0) FROM int4_tbl GROUP BY f1 (Tom)
|
||||
Fix SELECT sentence.words[0] FROM sentence GROUP BY sentence.words[0] (Tom)
|
||||
Allow utility statements in plpgsql (Tom)
|
||||
Fix GROUP BY scan bug (Tom)
|
||||
Improvements in SQL grammar processing (Tom)
|
||||
Fix for views involved in INSERT ... SELECT ... (Tom)
|
||||
|
|
@ -67,9 +51,9 @@ Fix for subselects in INSERT ... SELECT (Tom)
|
|||
Prevent INSERT ... SELECT ... ORDER BY (Tom)
|
||||
Fixes for relations greater than 2GB, including vacuum
|
||||
Improve communication of system table changes to other running backends (Tom)
|
||||
Improve communication of user table modifications to other running backends (Tom)
|
||||
Improve communication of user table modifications to other running backends (To
|
||||
m)
|
||||
Fix handling of temp tables in complex situations (Bruce, Tom)
|
||||
Disallow DROP TABLE/DROP INDEX inside a transaction block
|
||||
Allow table locking when tables opened, improving concurrent reliability (Tom)
|
||||
Properly quote sequence names in pg_dump (Ross J. Reedstrom)
|
||||
Prevent DESTROY DATABASE while others accessing
|
||||
|
|
@ -110,6 +94,12 @@ Fix for spinlock stuck problem when error is generated (Hiroshi)
|
|||
Fix ipcclean on Linux
|
||||
Fix handling of NULL constraint conditions (Tom)
|
||||
Fix memory leak in odbc driver (Nick Gorham)
|
||||
Fix for permission check on UNION tables (Tom)
|
||||
Fix to allow SELECT 'a' LIKE 'a' (Tom)
|
||||
Fix for SELECT 1 + NULL (Tom)
|
||||
Fixes to CHAR
|
||||
Fix log() on numeric type (Tom)
|
||||
Remove ':' and ';' operators
|
||||
|
||||
Enhancements
|
||||
------------
|
||||
|
|
@ -123,8 +113,8 @@ Issue ecpg error if NULL value is returned to variable with no NULL
|
|||
indicator (Christof)
|
||||
Allow ^C to cancel COPY command (Massimo)
|
||||
Add SET FSYNC and SHOW PG_OPTIONS commands(Massimo)
|
||||
Improve CREATE FUNCTION to allow type conversion specification
|
||||
(Bernie Frankpitt)
|
||||
Improve CREATE FUNCTION to allow type conversion specification
|
||||
(Bernie Frankpitt)
|
||||
Add CmdTuples() to libpq++(Vince)
|
||||
New CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands(Jan)
|
||||
Allow CREATE FUNCTION WITH clause to be used for all language types
|
||||
|
|
@ -133,12 +123,12 @@ configure --disable-debug removes -g (Peter E)
|
|||
Allow more complex default expressions (Tom)
|
||||
First real FOREIGN KEY constraint trigger functionality (Jan)
|
||||
Add FOREIGN KEY ... MATCH FULL ... ON DELETE CASCADE (Jan)
|
||||
Add FOREIGN KEY ... MATCH <unspecified> referential actions (Don Baccus)
|
||||
Add FOREIGN KEY ... MATCH referential actions (Don Baccus)
|
||||
Allow WHERE restriction on ctid (physical heap location) (Hiroshi)
|
||||
Move pginterface from contrib to interface directory, rename to pgeasy (Bruce)
|
||||
Add DEC and SESSION_USER as reserved words
|
||||
Require SELECT DISTINCT target list to have all ORDER BY columns (Tom)
|
||||
Add Oracle's COMMENT ON command (Mike Mascari <mascarim@yahoo.
|
||||
Add Oracle's COMMENT ON command (Mike Mascari yahoo.
|
||||
libpq's PQsetNoticeProcessor function now returns previous hook(Peter E)
|
||||
Prevent PQsetNoticeProcessor from being set to NULL (Peter E)
|
||||
Make USING in COPY optional (Bruce)
|
||||
|
|
@ -151,8 +141,8 @@ Added psql LastOid variable to return last inserted oid (Peter E)
|
|||
Allow concurrent vacuum and remove pg_vlock vacuum lock file (Tom)
|
||||
Add permissions check so only Postgres superuser or table owner can
|
||||
vacuum (Peter E)
|
||||
New libpq functions to allow asynchronous connections: PQconnectStart(),
|
||||
PQconnectPoll(), PQresetStart(), PQresetPoll(), PQsetenvStart(),
|
||||
New libpq functions to allow asynchronous connections: PQconnectStart(),
|
||||
PQconnectPoll(), PQresetStart(), PQresetPoll(), PQsetenvStart(),
|
||||
PQsetenvPoll(), PQsetenvAbort (Ewan Mellor)
|
||||
New libpq PQsetenv() function (Ewan Mellor)
|
||||
create/alter user extension (Peter E)
|
||||
|
|
@ -170,8 +160,8 @@ Add CREATE/ALTER/DROP GROUP (Peter E)
|
|||
All administration scripts now support --long options (Peter E, Karel)
|
||||
Vacuumdb script now supports --alldb option (Peter E)
|
||||
ecpg new portable FETCH syntax
|
||||
Add ecpg EXEC SQL IFDEF, EXEC SQL IFNDEF, EXEC SQL ELSE, EXEC SQL ELIF
|
||||
and EXEC SQL ENDIF directives
|
||||
Add ecpg EXEC SQL IFDEF, EXEC SQL IFNDEF, EXEC SQL ELSE, EXEC SQL ELIF
|
||||
and EXEC SQL ENDIF directives
|
||||
Add pg_ctl script to control backend startup (Tatsuo)
|
||||
Add postmaster.opts.default file to store startup flags (Tatsuo)
|
||||
Allow --with-mb=SQL_ASCII
|
||||
|
|
@ -196,7 +186,7 @@ Allow COPY IN to read file that do not end with a newline (Tom)
|
|||
Indicate when long identifiers are truncated (Tom)
|
||||
Allow aggregates to use type equivalency (Peter E)
|
||||
Add Oracle's to_char(), to_date(), to_datetime(), to_timestamp(), to_number()
|
||||
conversion functions (Karel Zak <zakkr@zf.jcu.cz>)
|
||||
conversion functions (Karel Zak zf.jcu.cz>)
|
||||
Add SELECT DISTINCT ON (expr [, expr ...]) targetlist ... (Tom)
|
||||
Check to be sure ORDER BY is compatible with the DISTINCT operation (Tom)
|
||||
Add NUMERIC and int8 types to ODBC
|
||||
|
|
@ -222,9 +212,15 @@ Allow PQrequestCancel() to terminate when in waiting-for-lock state (Hiroshi)
|
|||
Allow negation of a negative number in all cases
|
||||
Add ecpg descriptors (Christof, Michael)
|
||||
Allow CREATE VIEW v AS SELECT f1::char(8) FROM tbl
|
||||
Allow casts with length, like foo::char(8)
|
||||
New libpq functions PQsetClientEncoding(), PQclientEncoding() (Tatsuo)
|
||||
Add support for SJIS user defined characters (Tatsuo)
|
||||
Larger views/rules supported
|
||||
Make libpq's PQconndefaults() thread-safe (Tom)
|
||||
Disable // as comment to be ANSI conforming, should use --
|
||||
Allow column aliases on views CREATE VIEW name (collist)
|
||||
Fixes for views with subqueries (Tom)
|
||||
Allow UPDATE table SET fld = (SELECT ...) (Tom)
|
||||
|
||||
Types
|
||||
-----
|
||||
|
|
@ -233,10 +229,10 @@ Allow bare column names to be subscripted as arrays (Tom)
|
|||
Improve type casting of int and float constants (Tom)
|
||||
Cleanups for int8 inputs, range checking, and type conversion (Tom)
|
||||
Fix for SELECT timespan('21:11:26'::time) (Tom)
|
||||
Fix for netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0
|
||||
(Oleg Sharoiko)
|
||||
Fix for netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0
|
||||
(Oleg Sharoiko)
|
||||
Add btree index on NUMERIC(Jan)
|
||||
Perl fix for large objects containing NUL characters (Douglas Thomson)
|
||||
Perl fix for large objects containing NUL characters (Douglas Thomson)
|
||||
ODBC fix for for large objects (free)
|
||||
Fix indexing of cidr data type
|
||||
Fix for Ethernet MAC addresses (macaddr type) comparisons
|
||||
|
|
@ -249,13 +245,25 @@ Make char_length()/octet_length including trailing blanks (Tom)
|
|||
Made abstime/reltime use int4 instead of time_t (Peter E)
|
||||
New lztext data type for compressed text fields
|
||||
Revise code to handle coercion of int and float constants (Tom)
|
||||
New C-routines to implement a BIT and BIT VARYING type in /contrib
|
||||
(Adriaan Joubert)
|
||||
New C-routines to implement a BIT and BIT VARYING type in /contrib
|
||||
(Adriaan Joubert)
|
||||
NUMERIC now accepts scientific notation (Tom)
|
||||
NUMERIC to int4 rounds (Tom)
|
||||
Convert float4/8 to NUMERIC properly (Tom)
|
||||
Allow type conversion with NUMERIC (Thomas)
|
||||
Make ISO date style (2000-02-16 09:33) the default (Thomas)
|
||||
Add NATIONAL CHAR [ VARYING ]
|
||||
Allow NUMERIC round and trunc to accept negative scales (Tom)
|
||||
New TIME WITH TIME ZONE type (Thomas)
|
||||
Add MAX()/MIN() on time type (Thomas)
|
||||
Add abs(), mod(), fac() for int8 (Thomas)
|
||||
Add round(), sqrt(), cbrt(), pow()
|
||||
Rename NUMERIC power() to pow()
|
||||
Improved TRANSLATE() function
|
||||
Allow X=-Y operators (Tom)
|
||||
Add exp() and ln() as NUMERIC types
|
||||
Allow SELECT float8(COUNT(*)) / (SELECT COUNT(*) FROM int4_tbl) FROM int4_tbl
|
||||
GROUP BY f1; (Tom)
|
||||
|
||||
Performance
|
||||
-----------
|
||||
|
|
@ -286,7 +294,8 @@ Improve pg_statistics management for VACUUM speed improvement (Tom)
|
|||
Flush backend cache less frequently (Tom, Hiroshi)
|
||||
COPY now reuses previous memory allocation, improving performance (Tom)
|
||||
Improve optimization cost estimation (Tom)
|
||||
Improve optimizer estimate of range queries x > lowbound AND x < highbound (Tom)
|
||||
Improve optimizer estimate of range queries x > lowbound AND x < highbound (Tom
|
||||
)
|
||||
Use DNF instead of CNF where appropriate (Tom, Taral)
|
||||
Further cleanup for OR-of-AND WHERE-clauses (Tom)
|
||||
Make use of index in OR clauses (x = 1 AND y = 2) OR (x = 2 AND y = 4) (Tom)
|
||||
|
|
@ -294,6 +303,7 @@ Smarter optimizer computations for random index page access (Tom)
|
|||
New SET variable to control optimizer costs (Tom)
|
||||
Optimizer queries based on LIMIT, OFFSET, and EXISTS qualifications (Tom)
|
||||
Reduce optimizer internal housekeeping of join paths for speedup (Tom)
|
||||
Major subquery speedup (Tom)
|
||||
|
||||
Source Tree Changes
|
||||
-------------------
|
||||
|
|
@ -304,9 +314,10 @@ Improved range checking for large integers on Alpha's
|
|||
Clean up #include in /include directory (Bruce)
|
||||
Add scripts for checking includes (Bruce)
|
||||
Remove un-needed #include's from *.c files (Bruce)
|
||||
Change #include's to use <> and "" as appropriate (Bruce)
|
||||
Change #include's to use
|
||||
and "" as appropriate (Bruce)
|
||||
Enable WIN32 compilation of libpq
|
||||
Alpha spinlock fix from Uncle George <gatgul@voicenet.com>
|
||||
Alpha spinlock fix from Uncle George voicenet.com>
|
||||
Overhaul of optimizer data structures (Tom)
|
||||
Fix to cygipc library (Yutaka Tanida)
|
||||
Allow pgsql to work on newer Cygwin snapshots(Dan)
|
||||
|
|
@ -323,6 +334,10 @@ Internally change datetime and timespan into timestamp and interval (Thomas)
|
|||
Fix for plpgsql on BSDI
|
||||
Add SQL_ASCII test case to the regression test (Tatsuo)
|
||||
configure --with-mb now deprecated (Tatsuo)
|
||||
NT fixes
|
||||
NetBSD fixes Johnny C. Lam stat.cmu.edu>
|
||||
Fixes for Alpha compiles
|
||||
New multibyte encodings
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
160
doc/FAQ
160
doc/FAQ
|
|
@ -1,9 +1,9 @@
|
|||
|
||||
Frequently Asked Questions (FAQ) for PostgreSQL
|
||||
|
||||
Last updated: Tue Sep 28 01:06:15 EDT 1999
|
||||
Last updated: Tue Mar 21 16:09:11 EST 2000
|
||||
|
||||
Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
|
||||
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
|
||||
|
||||
The most recent version of this document can be viewed at the
|
||||
postgreSQL Web site, http://www.PostgreSQL.org.
|
||||
|
|
@ -87,7 +87,10 @@
|
|||
regexp searching?
|
||||
4.14) In a query, how do I detect if a field is NULL?
|
||||
4.15) What is the difference between the various character types?
|
||||
4.16) How do I create a serial/auto-incrementing field?
|
||||
4.16.1) How do I create a serial/auto-incrementing field?
|
||||
4.16.2) How do I get the value of a serial insert?
|
||||
4.16.3) Wouldn't use of currval() and nextval() lead to a race
|
||||
condition with other concurrent backend processes?
|
||||
4.17) What is an oid? What is a tid?
|
||||
4.18) What is the meaning of some of the terms used in PostgreSQL?
|
||||
4.19) Why do I get the error "FATAL: palloc failure: memory
|
||||
|
|
@ -96,6 +99,7 @@
|
|||
4.21) My large-object operations get invalid large obj descriptor.
|
||||
Why?
|
||||
4.22) How do I create a column that will default to the current time?
|
||||
4.23) Why are my subqueries using IN so slow?
|
||||
|
||||
Extending PostgreSQL
|
||||
|
||||
|
|
@ -144,7 +148,8 @@
|
|||
|
||||
PostgreSQL Data Base Management System
|
||||
|
||||
Copyright (c) 1994-6 Regents of the University of California
|
||||
Portions copyright (c) 1996-2000, PostgreSQL, Inc Portions Copyright
|
||||
(c) 1994-6 Regents of the University of California
|
||||
|
||||
Permission to use, copy, modify, and distribute this software and its
|
||||
documentation for any purpose, without fee, and without a written
|
||||
|
|
@ -198,8 +203,8 @@
|
|||
Unix/NT porting library. See pgsql/doc/README.NT in the distribution.
|
||||
|
||||
There is also a web page at
|
||||
http://members.tripod.com/~kevlo/postgres/portNT.html. There is
|
||||
another port using U/Win at http://surya.wipro.com/uwin/ported.html.
|
||||
http://www.freebsd.org/~kevlo/postgres/portNT.html. There is another
|
||||
port using U/Win at http://surya.wipro.com/uwin/ported.html.
|
||||
|
||||
1.5) Where can I get PostgreSQL?
|
||||
|
||||
|
|
@ -279,10 +284,14 @@
|
|||
|
||||
There is a nice tutorial at http://w3.one.net/~jhoffman/sqltut.htm and
|
||||
at
|
||||
http://ourworld.compuserve.com/homepages/Graeme_Birchall/DB2_COOK.HTM.
|
||||
http://ourworld.compuserve.com/homepages/Graeme_Birchall/HTM_COOK.HTM.
|
||||
|
||||
Another one is "Teach Yourself SQL in 21 Days, Second Edition" at
|
||||
http://members.tripod.com/er4ebus/sql/index.htm
|
||||
|
||||
Many of our users like The Practical SQL Handbook, Bowman et al.,
|
||||
Addison Wesley.
|
||||
Addison Wesley. Others like Lan Times Guide to SQL, Groff et al.,
|
||||
Osborne McGraw-Hill.
|
||||
|
||||
1.11) Is PostgreSQL Y2K compliant?
|
||||
|
||||
|
|
@ -295,7 +304,7 @@
|
|||
subscribe to the pgsql-hackers and pgsql-patches mailing lists. Third,
|
||||
submit high-quality patches to pgsql-patches.
|
||||
|
||||
There are about a dozen people who have commit privileges to the
|
||||
There are about a dozen people who have COMMIT privileges to the
|
||||
PostgreSQL CVS archive. All of them have submitted so many
|
||||
high-quality patches that it was a pain for the existing committers to
|
||||
keep up, and we had confidence that patches they committed were likely
|
||||
|
|
@ -506,13 +515,13 @@
|
|||
|
||||
3.10) How do I tune the database engine for better performance?
|
||||
|
||||
Certainly, indices can speed up queries. The explain command allows
|
||||
Certainly, indices can speed up queries. The EXPLAIN command allows
|
||||
you to see how PostgreSQL is interpreting your query, and which
|
||||
indices are being used.
|
||||
|
||||
If you are doing a lot of inserts, consider doing them in a large
|
||||
batch using the copy command. This is much faster than single
|
||||
individual inserts. Second, statements not in a begin work/commit
|
||||
If you are doing a lot of INSERTs, consider doing them in a large
|
||||
batch using the COPY command. This is much faster than single
|
||||
individual INSERTS. Second, statements not in a BEGIN WORK/COMMIT
|
||||
transaction block are considered to be in their own transaction.
|
||||
Consider performing several statements in a single transaction block.
|
||||
This reduces the transaction overhead. Also consider dropping and
|
||||
|
|
@ -534,7 +543,7 @@
|
|||
is unwise to make this value too large, or you may run out of memory
|
||||
when a query invokes several concurrent sorts.
|
||||
|
||||
You can also use the cluster command to group data in base tables to
|
||||
You can also use the CLUSTER command to group data in base tables to
|
||||
match an index. See the cluster(l) manual page for more details.
|
||||
|
||||
3.11) What debugging features are available in PostgreSQL?
|
||||
|
|
@ -607,7 +616,7 @@
|
|||
3.13) What are the pg_tempNNN.NN files in my database directory?
|
||||
|
||||
They are temporary files generated by the query executor. For example,
|
||||
if a sort needs to be done to satisfy an order by, and the sort
|
||||
if a sort needs to be done to satisfy an ORDER BY, and the sort
|
||||
requires more space than the backend's -S parameter allows, then temp
|
||||
files are created to hold the extra data.
|
||||
|
||||
|
|
@ -648,16 +657,17 @@
|
|||
4.2) What is the exact difference between binary cursors and normal
|
||||
cursors?
|
||||
|
||||
See the declare manual page for a description.
|
||||
See the DECLARE manual page for a description.
|
||||
|
||||
4.3) How do I select only the first few rows of a query?
|
||||
4.3) How do I SELECT only the first few rows of a query?
|
||||
|
||||
See the fetch manual page, or use SELECT ... LIMIT....
|
||||
See the FETCH manual page, or use SELECT ... LIMIT....
|
||||
|
||||
This only prevents all row results from being transferred to the
|
||||
client. The entire query must be evaluated, even if you only want just
|
||||
the first few rows. Consider a query that has an order by. There is no
|
||||
way to return any rows until the entire query is evaluated and sorted.
|
||||
The entire query may have to be evaluated, even if you only want the
|
||||
first few rows. Consider a query that has an ORDER BY. If there is an
|
||||
index that matches the ORDER BY, PostgreSQL may be able to evaluate
|
||||
only the first few records requested, or the entire query may have to
|
||||
be evaluated until the desired rows have been generated.
|
||||
|
||||
4.4) How do I get a list of tables, or other information I see in psql?
|
||||
|
||||
|
|
@ -669,7 +679,7 @@
|
|||
|
||||
4.5) How do you remove a column from a table?
|
||||
|
||||
We do not support alter table drop column, but do this:
|
||||
We do not support ALTER TABLE DROP COLUMN, but do this:
|
||||
SELECT ... -- select all columns but the one you want to remove
|
||||
INTO TABLE new_table
|
||||
FROM old_table;
|
||||
|
|
@ -725,35 +735,36 @@
|
|||
\? to see them.
|
||||
|
||||
Also try the file pgsql/src/tutorial/syscat.source. It illustrates
|
||||
many of the selects needed to get information from the database system
|
||||
many of the SELECTs needed to get information from the database system
|
||||
tables.
|
||||
|
||||
4.9) My queries are slow or don't make use of the indexes. Why?
|
||||
|
||||
PostgreSQL does not automatically maintain statistics. One has to make
|
||||
an explicit vacuum call to update the statistics. After statistics are
|
||||
an explicit VACUUM call to update the statistics. After statistics are
|
||||
updated, the optimizer knows how many rows in the table, and can
|
||||
better decide if it should use indices. Note that the optimizer does
|
||||
not use indices in cases when the table is small because a sequential
|
||||
scan would be faster.
|
||||
|
||||
For column-specific optimization statistics, use vacuum analyze.
|
||||
Vacuum analyze is important for complex multi-join queries, so the
|
||||
For column-specific optimization statistics, use VACUUM ANALYZE.
|
||||
VACUUM ANALYZE is important for complex multi-join queries, so the
|
||||
optimizer can estimate the number of rows returned from each table,
|
||||
and choose the proper join order. The backend does not keep track of
|
||||
column statistics on its own, so vacuum analyze must be run to collect
|
||||
column statistics on its own, so VACUUM ANALYZE must be run to collect
|
||||
them periodically.
|
||||
|
||||
Indexes are not used for order by operations.
|
||||
Indexes are not used for ORDER BY operations.
|
||||
|
||||
When using wild-card operators such as LIKE or ~, indices can only be
|
||||
used if the beginning of the search is anchored to the start of the
|
||||
string. So, to use indices, LIKE searches can should not begin with %,
|
||||
and ~(regular expression searches) should start with ^.
|
||||
and ~(regular expression searches) should start with ^. If you have
|
||||
locale enabled, indexes can't be used for wild-card searches.
|
||||
|
||||
4.10) How do I see how the query optimizer is evaluating my query?
|
||||
|
||||
See the explain manual page.
|
||||
See the EXPLAIN manual page.
|
||||
|
||||
4.11) What is an R-tree index?
|
||||
|
||||
|
|
@ -816,14 +827,60 @@ BYTEA bytea variable-length array of bytes
|
|||
using them. Specifically, the penalty is for access to all columns
|
||||
after the first column of this type.
|
||||
|
||||
4.16) How do I create a serial/auto-incrementing field?
|
||||
4.16.1) How do I create a serial/auto-incrementing field?
|
||||
|
||||
PostgreSQL supports a serial data type. It auto-creates a sequence and
|
||||
index on the column. See the create_sequence manual page for more
|
||||
information about sequences. You can also use each row's oid field as
|
||||
a unique value. However, if you need to dump and reload the database,
|
||||
you need to use pg_dump's -o option or copy with oids option to
|
||||
preserve the oids.
|
||||
PostgreSQL supports SERIAL data type. It auto-creates a sequence and
|
||||
index on the column. For example, this...
|
||||
CREATE TABLE person (
|
||||
id SERIAL,
|
||||
name TEXT
|
||||
);
|
||||
|
||||
...is automatically translated into this...
|
||||
CREATE SEQUENCE person_id_seq;
|
||||
CREATE TABLE person (
|
||||
id INT4 NOT NULL DEFAULT nextval('person_id_seq'),
|
||||
name TEXT
|
||||
);
|
||||
CREATE UNIQUE INDEX person_id_key ON person ( id );
|
||||
|
||||
See the create_sequence manual page for more information about
|
||||
sequences. You can also use each row's oid field as a unique value.
|
||||
However, if you need to dump and reload the database, you need to use
|
||||
pg_dump's -o option or COPY WITH OIDS option to preserve the oids.
|
||||
|
||||
For more details, see Bruce Momjian's chapter on Numbering Rows.
|
||||
|
||||
4.16.2) How do I get the back the generated SERIAL value after an insert?
|
||||
|
||||
Probably the simplest approach is to to retrieve the next SERIAL value
|
||||
from the sequence object with the nextval() function before inserting
|
||||
and then insert it explicitly. Using the example table in 4.16.1, that
|
||||
might look like this:
|
||||
$newSerialID = nextval('person_id_seq');
|
||||
INSERT INTO person (id, name) VALUES ($newSerialID, 'Blaise Pascal');
|
||||
|
||||
You would then also have the new value stored in $newSerialID for use
|
||||
in other queries (e.g., as a foreign key to the person table). Note
|
||||
that the name of the automatically-created SEQUENCE object will be
|
||||
named <table>_<serialcolumn>_seq, where table and serialcolumn are the
|
||||
names of your table and your SERIAL column, respectively.
|
||||
|
||||
Similarly, you could retrieve the just-assigned SERIAL value with the
|
||||
currval() function after it was inserted by default, e.g.,
|
||||
INSERT INTO person (name) VALUES ('Blaise Pascal');
|
||||
$newID = currval('person_id_seq');
|
||||
|
||||
Finally, you could use the oid returned from the INSERT statement to
|
||||
lookup the default value, though this is probably the least portable
|
||||
approach. In perl, using DBI with Edmund Mergl's DBD::Pg module, the
|
||||
oid value is made available via $sth->{pg_oid_status} after
|
||||
$sth->execute().
|
||||
|
||||
4.16.3) Wouldn't use of currval() and nextval() lead to a race condition
|
||||
with other concurrent backend processes?
|
||||
|
||||
No. That has been handled by the backends.
|
||||
|
||||
4.17) What is an oid? What is a tid?
|
||||
|
||||
|
|
@ -858,9 +915,9 @@ BYTEA bytea variable-length array of bytes
|
|||
|
||||
Some of the source code and older documentation use terms that have
|
||||
more common usage. Here are some:
|
||||
* table, relation, class
|
||||
* row, record, tuple
|
||||
* attribute, field, column
|
||||
* table, class
|
||||
* column, field, attribute
|
||||
* retrieve, select
|
||||
* replace, update
|
||||
* append, insert
|
||||
|
|
@ -913,10 +970,27 @@ BYTEA bytea variable-length array of bytes
|
|||
|
||||
but this makes the column default to the time of table creation, not
|
||||
the time of row insertion. Instead do:
|
||||
create table test (x int, modtime timestamp default text 'now');
|
||||
CREATE TABLE test (x int, modtime timestamp default now() );
|
||||
|
||||
The casting of the value to text prevents the default value from being
|
||||
computed at table creation time, and delays it until insertion time.
|
||||
The calling of the function now() prevents the default value from
|
||||
being computed at table creation time, and delays it until insertion
|
||||
time. We believe this will not be a problem in post-6.5.* releases.
|
||||
|
||||
4.23) Why are my subqueries using IN so slow?
|
||||
|
||||
Currently, we join subqueries to outer queries by sequential scanning
|
||||
the result of the subquery for each row of the outer query. A
|
||||
workaround is to replace IN with EXISTS. For example, change:
|
||||
SELECT *
|
||||
FROM tab
|
||||
WHERE col1 IN (SELECT col2 FROM TAB2)
|
||||
|
||||
to:
|
||||
SELECT *
|
||||
FROM tab
|
||||
WHERE EXISTS (SELECT col2 FROM TAB2 WHERE col1 = col2)
|
||||
|
||||
We hope to fix this limitation in a future release.
|
||||
_________________________________________________________________
|
||||
|
||||
Extending PostgreSQL
|
||||
|
|
|
|||
|
|
@ -19,8 +19,8 @@
|
|||
<title id="BOWMAN93-full">
|
||||
The Practical <acronym>SQL</acronym> Handbook
|
||||
</title>
|
||||
<titleabbrev id="BOWMAN93">
|
||||
Bowman et al, 1993
|
||||
<titleabbrev id="BOWMAN96">
|
||||
Bowman et al, 1996
|
||||
</titleabbrev>
|
||||
<subtitle>
|
||||
Using Structured Query Language
|
||||
|
|
@ -28,7 +28,7 @@
|
|||
<edition>3</edition>
|
||||
<authorgroup>
|
||||
<author>
|
||||
<firstname>Judity</firstname>
|
||||
<firstname>Judith</firstname>
|
||||
<surname>Bowman</surname>
|
||||
</author>
|
||||
<author>
|
||||
|
|
@ -37,7 +37,7 @@
|
|||
</author>
|
||||
<author>
|
||||
<firstname>Marcy</firstname>
|
||||
<surname>Damovsky</surname>
|
||||
<surname>Darnovsky</surname>
|
||||
</author>
|
||||
</authorgroup>
|
||||
<isbn>0-201-44787-8</isbn>
|
||||
|
|
@ -46,7 +46,7 @@
|
|||
<publishername>Addison-Wesley</publishername>
|
||||
</publisher>
|
||||
<copyright>
|
||||
<year>1997</year>
|
||||
<year>1996</year>
|
||||
<holder>Addison-Wesley Longman, Inc.</holder>
|
||||
</copyright>
|
||||
<!--
|
||||
|
|
|
|||
|
|
@ -1,6 +1,405 @@
|
|||
<chapter id="release">
|
||||
<title>Release Notes</title>
|
||||
|
||||
<sect1>
|
||||
<title>Release 7.0</title>
|
||||
<!--
|
||||
<docinfo>
|
||||
<authorgroup>
|
||||
<author>
|
||||
<firstname>Bruce</firstname>
|
||||
<surname>Momjian</surname>
|
||||
</author>
|
||||
</authorgroup>
|
||||
<date>2000-04-01</date>
|
||||
</docinfo>
|
||||
-->
|
||||
|
||||
|
||||
|
||||
<para>
|
||||
This release shows the continued growth of PostgreSQL. There are more
|
||||
changes in 7.0 than in any previous release. Don't be concerned this is
|
||||
a dot-zero release. We do our best to put out only solid releases, and
|
||||
this one is no exception.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Major changes in this release:
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>
|
||||
Foreign Keys
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Foreign keys are now implemented, with the exception of PARTIAL MATCH
|
||||
foreign keys. Many users have been asking for this feature, and we are
|
||||
pleased to offer it.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>
|
||||
Optimizer Overhaul
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Continuing on work started a year ago, the optimizer has been
|
||||
overhauled, allowing improved query execution and better performance
|
||||
with less memory usage.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>
|
||||
Updated psql
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
<application>psql</application>, our interactive terminal monitor, has been
|
||||
updated with a variety of new features. See the psql manual page for details.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>
|
||||
Upcoming Features
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
In 7.1, we plan to have outer joins, storage for very long rows, and a
|
||||
write-ahead logging system.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</para>
|
||||
|
||||
<sect2>
|
||||
<title>Migration to v7.0</title>
|
||||
|
||||
<para>
|
||||
A dump/restore using <application>pg_dump</application>
|
||||
is required for those wishing to migrate data from any
|
||||
previous release of <productname>Postgres</productname>.
|
||||
For those upgrading from 6.5.*, you can use
|
||||
<application>pg_upgrade</application> to upgrade to this
|
||||
release.
|
||||
</para>
|
||||
</sect2>
|
||||
|
||||
<sect2>
|
||||
<title>Detailed Change List</title>
|
||||
<para>
|
||||
<programlisting>
|
||||
Bug Fixes
|
||||
---------
|
||||
Prevent function calls with more than maximum number of arguments (Tom)
|
||||
Many fixes for CASE (Tom)
|
||||
Fix SELECT coalesce(f1,0) FROM int4_tbl GROUP BY f1 (Tom)
|
||||
Fix SELECT sentence.words[0] FROM sentence GROUP BY sentence.words[0] (Tom)
|
||||
Fix GROUP BY scan bug (Tom)
|
||||
Improvements in SQL grammar processing (Tom)
|
||||
Fix for views involved in INSERT ... SELECT ... (Tom)
|
||||
Fix for SELECT a/2, a/2 FROM test_missing_target GROUP BY a/2 (Tom)
|
||||
Fix for subselects in INSERT ... SELECT (Tom)
|
||||
Prevent INSERT ... SELECT ... ORDER BY (Tom)
|
||||
Fixes for relations greater than 2GB, including vacuum
|
||||
Improve communication of system table changes to other running backends (Tom)
|
||||
Improve communication of user table modifications to other running backends (Tom)
|
||||
Fix handling of temp tables in complex situations (Bruce, Tom)
|
||||
Allow table locking when tables opened, improving concurrent reliability (Tom)
|
||||
Properly quote sequence names in pg_dump (Ross J. Reedstrom)
|
||||
Prevent DESTROY DATABASE while others accessing
|
||||
Prevent any rows from being returned by GROUP BY if no rows processed (Tom)
|
||||
Fix SELECT COUNT(1) FROM table WHERE ...' if no rows matching WHERE (Tom)
|
||||
Fix pg_upgrade so it works for MVCC(Tom)
|
||||
Fix for SELECT ... WHERE x IN (SELECT ... HAVING SUM(x) > 1) (Tom)
|
||||
Make TABLE optional keyword in LOCK TABLE (Bruce)
|
||||
Fix for "f1 datetime DEFAULT 'now'" (Tom)
|
||||
Fix problems with CURRENT_DATE used in DEFAULT (Tom)
|
||||
Allow comment-only lines, and ;;; lines too. (Tom)
|
||||
Improve recovery after failed disk writes, disk full (Hiroshi)
|
||||
Fix cases where table is mentioned in FROM but not joined (Tom)
|
||||
Allow HAVING clause without aggregate functions (Tom)
|
||||
Fix for "--" comment and no trailing newline, as seen in Perl
|
||||
Improve pg_dump failure error reports (Bruce)
|
||||
Allow sorts and hashes to exceed 2GB file sizes (Tom)
|
||||
Fix for pg_dump dumping of inherited rules (Tom)
|
||||
Fix for NULL handling comparisons (Tom)
|
||||
Fix inconsistent state caused by failed CREATE/DROP commands (Hiroshi)
|
||||
Fix for dbname with dash
|
||||
Prevent DROP INDEX from interfering with other backends (Tom)
|
||||
Fix file descriptor leak in verify_password()
|
||||
Fix for "Unable to identify an operator =$" problem
|
||||
Fix ODBC so no segfault if CommLog and Debug enabled (Dirk Niggemann)
|
||||
Fix for recursive exit call (Massimo)
|
||||
Fix for extra-long timezones (Jeroen van Vianen)
|
||||
Make pg_dump preserve primary key information (Peter E)
|
||||
Prevent databases with single quotes (Peter E)
|
||||
Prevent DROP DATABASE inside transaction (Peter E)
|
||||
ecpg memory leak fixes (Stephen Birch)
|
||||
Fix for SELECT null::text, SELECT int4fac(null) and SELECT 2 + (null) (Tom)
|
||||
Y2K timestamp fix (Massimo)
|
||||
Fix for VACUUM 'HEAP_MOVED_IN was not expected' errors (Tom)
|
||||
Fix for views with tables/columns containing spaces (Tom)
|
||||
Prevent permissions on indexes (Peter E)
|
||||
Fix for spinlock stuck problem when error is generated (Hiroshi)
|
||||
Fix ipcclean on Linux
|
||||
Fix handling of NULL constraint conditions (Tom)
|
||||
Fix memory leak in odbc driver (Nick Gorham)
|
||||
Fix for permission check on UNION tables (Tom)
|
||||
Fix to allow SELECT 'a' LIKE 'a' (Tom)
|
||||
Fix for SELECT 1 + NULL (Tom)
|
||||
Fixes to CHAR
|
||||
Fix log() on numeric type (Tom)
|
||||
Remove ':' and ';' operators
|
||||
|
||||
Enhancements
|
||||
------------
|
||||
New CLI interface include file sqlcli.h, based on SQL3/SQL98
|
||||
Remove all limits on query length, row length limit still exists (Tom)
|
||||
Update jdbc protocol to 2.0 (Jens Glaser jens@jens.de)
|
||||
Add TRUNCATE command to quickly truncate relation (Mike Mascari)
|
||||
Fix to give super user and createdb user proper update catalog rights (Peter E)
|
||||
Allow ecpg bool variables to have NULL values (Christof)
|
||||
Issue ecpg error if NULL value is returned to variable with no NULL
|
||||
indicator (Christof)
|
||||
Allow ^C to cancel COPY command (Massimo)
|
||||
Add SET FSYNC and SHOW PG_OPTIONS commands(Massimo)
|
||||
Improve CREATE FUNCTION to allow type conversion specification
|
||||
(Bernie Frankpitt)
|
||||
Add CmdTuples() to libpq++(Vince)
|
||||
New CREATE CONSTRAINT TRIGGER and SET CONSTRAINTS commands(Jan)
|
||||
Allow CREATE FUNCTION WITH clause to be used for all language types
|
||||
configure --enable-debug adds -g (Peter E)
|
||||
configure --disable-debug removes -g (Peter E)
|
||||
Allow more complex default expressions (Tom)
|
||||
First real FOREIGN KEY constraint trigger functionality (Jan)
|
||||
Add FOREIGN KEY ... MATCH FULL ... ON DELETE CASCADE (Jan)
|
||||
Add FOREIGN KEY ... MATCH <unspecified> referential actions (Don Baccus)
|
||||
Allow WHERE restriction on ctid (physical heap location) (Hiroshi)
|
||||
Move pginterface from contrib to interface directory, rename to pgeasy (Bruce)
|
||||
Add DEC and SESSION_USER as reserved words
|
||||
Require SELECT DISTINCT target list to have all ORDER BY columns (Tom)
|
||||
Add Oracle's COMMENT ON command (Mike Mascari <mascarim@yahoo.
|
||||
libpq's PQsetNoticeProcessor function now returns previous hook(Peter E)
|
||||
Prevent PQsetNoticeProcessor from being set to NULL (Peter E)
|
||||
Make USING in COPY optional (Bruce)
|
||||
Allow subselects in the target list (Tom)
|
||||
Allow subselects on the left side of comparison operators (Tom)
|
||||
New parallel regression test (Jan)
|
||||
Change backend-side COPY to write files with permissions 644 not 666 (Tom)
|
||||
Force permissions on PGDATA directory to be secure, even if it exists (Tom)
|
||||
Added psql LastOid variable to return last inserted oid (Peter E)
|
||||
Allow concurrent vacuum and remove pg_vlock vacuum lock file (Tom)
|
||||
Add permissions check so only Postgres superuser or table owner can
|
||||
vacuum (Peter E)
|
||||
New libpq functions to allow asynchronous connections: PQconnectStart(),
|
||||
PQconnectPoll(), PQresetStart(), PQresetPoll(), PQsetenvStart(),
|
||||
PQsetenvPoll(), PQsetenvAbort (Ewan Mellor)
|
||||
New libpq PQsetenv() function (Ewan Mellor)
|
||||
create/alter user extension (Peter E)
|
||||
New postmaster.pid and postmaster.opts under $PGDATA (Tatsuo)
|
||||
New scripts for create/drop user/db (Peter E)
|
||||
Major psql overhaul(Peter E)
|
||||
Add const to libpq interface(Peter E)
|
||||
New libpq function PQoidValue (Peter E)
|
||||
Show specific non-aggregate causing problem with GROUP BY (Tom)
|
||||
Make changes to pg_shadow recreate pg_pwd file (Peter E)
|
||||
Add aggregate(DISTINCT ...) (Tom)
|
||||
Allow flag to control COPY input/output of NULLs (Peter E)
|
||||
Make postgres user have a password by default (Peter E)
|
||||
Add CREATE/ALTER/DROP GROUP (Peter E)
|
||||
All administration scripts now support --long options (Peter E, Karel)
|
||||
Vacuumdb script now supports --alldb option (Peter E)
|
||||
ecpg new portable FETCH syntax
|
||||
Add ecpg EXEC SQL IFDEF, EXEC SQL IFNDEF, EXEC SQL ELSE, EXEC SQL ELIF
|
||||
and EXEC SQL ENDIF directives
|
||||
Add pg_ctl script to control backend startup (Tatsuo)
|
||||
Add postmaster.opts.default file to store startup flags (Tatsuo)
|
||||
Allow --with-mb=SQL_ASCII
|
||||
Increase maximum number of index keys to 16 (Bruce)
|
||||
Increase maximum number of function arguments to 16 (Bruce)
|
||||
Allow user configuration of maximum number of index keys and arguments
|
||||
(Bruce)
|
||||
Allow unprivileged users to change their passwords (Peter E)
|
||||
With password authentication enabled, new users without passwords can't
|
||||
connect (Peter E)
|
||||
Disallow dropping a user who owns a database (Peter E)
|
||||
Add initdb --enable-multibyte option (Peter E)
|
||||
Add option for initdb to prompts for superuser password (Peter E)
|
||||
Allow complex type casts like col::numeric(9,2) and col::int2::float8 (Tom)
|
||||
Updated user interfaces on initdb, initlocation, pg_dump, ipcclean
|
||||
(Peter E)
|
||||
New pg_char_to_encoding() and pg_encoding_to_char() functions (Tatsuo
|
||||
Libpq non-blocking mode (Alfred Perlstein)
|
||||
Improve conversion of types in casts that don't specify a length
|
||||
New plperl internal programming language (Mark Hollomon)
|
||||
Allow COPY IN to read file that do not end with a newline (Tom)
|
||||
Indicate when long identifiers are truncated (Tom)
|
||||
Allow aggregates to use type equivalency (Peter E)
|
||||
Add Oracle's to_char(), to_date(), to_datetime(), to_timestamp(), to_number()
|
||||
conversion functions (Karel Zak <zakkr@zf.jcu.cz>)
|
||||
Add SELECT DISTINCT ON (expr [, expr ...]) targetlist ... (Tom)
|
||||
Check to be sure ORDER BY is compatible with the DISTINCT operation (Tom)
|
||||
Add NUMERIC and int8 types to ODBC
|
||||
Improve EXPLAIN results for Append, Group, Agg, Unique (Tom)
|
||||
Add ALTER TABLE ... ADD FOREIGN KEY (Stephan Szabo)
|
||||
Allow SELECT .. FOR UPDATE in PL/pgSQL (Hiroshi)
|
||||
Enable backward sequential scan even after reaching EOF (Hiroshi)
|
||||
Add btree indexing of boolean values, >= and <= (Don Baccus)
|
||||
Print current line number when COPY FROM fails (Massimo)
|
||||
Recognize special case of POSIX time zone: "GMT+8" and "GMT-8" (Thomas)
|
||||
Add DEC as synonym for "DECIMAL (Thomas)
|
||||
Add SESSION_USER as SQL92 keyword, same as CURRENT_USER (Thomas)
|
||||
Implement column aliases (aka correlation names) and more join syntax
|
||||
(Thomas)
|
||||
Allow queries like SELECT a FROM t1 tx (a) (Thomas)
|
||||
Allow queries like SELECT * FROM t1 NATURAL JOIN t2 (Thomas)
|
||||
Make INTERVAL reserved word allowed as a column identifier (Thomas)
|
||||
Implement REINDEX command (Hiroshi)
|
||||
Accept ALL in aggregate function SUM(ALL col) (Tom)
|
||||
Prevent GROUP BY from using column aliases (Tom)
|
||||
New psql \encoding option (Tatsuo)
|
||||
Allow PQrequestCancel() to terminate when in waiting-for-lock state (Hiroshi)
|
||||
Allow negation of a negative number in all cases
|
||||
Add ecpg descriptors (Christof, Michael)
|
||||
Allow CREATE VIEW v AS SELECT f1::char(8) FROM tbl
|
||||
Allow casts with length, like foo::char(8)
|
||||
New libpq functions PQsetClientEncoding(), PQclientEncoding() (Tatsuo)
|
||||
Add support for SJIS user defined characters (Tatsuo)
|
||||
Larger views/rules supported
|
||||
Make libpq's PQconndefaults() thread-safe (Tom)
|
||||
Disable // as comment to be ANSI conforming, should use --
|
||||
Allow column aliases on views CREATE VIEW name (collist)
|
||||
Fixes for views with subqueries (Tom)
|
||||
Allow UPDATE table SET fld = (SELECT ...) (Tom)
|
||||
|
||||
Types
|
||||
-----
|
||||
Many array fixes (Tom)
|
||||
Allow bare column names to be subscripted as arrays (Tom)
|
||||
Improve type casting of int and float constants (Tom)
|
||||
Cleanups for int8 inputs, range checking, and type conversion (Tom)
|
||||
Fix for SELECT timespan('21:11:26'::time) (Tom)
|
||||
Fix for netmask('x.x.x.x/0') is 255.255.255.255 instead of 0.0.0.0
|
||||
(Oleg Sharoiko)
|
||||
Add btree index on NUMERIC(Jan)
|
||||
Perl fix for large objects containing NUL characters (Douglas Thomson)
|
||||
ODBC fix for for large objects (free)
|
||||
Fix indexing of cidr data type
|
||||
Fix for Ethernet MAC addresses (macaddr type) comparisons
|
||||
Fix for date/time types when overflows happened in computations (Tom)
|
||||
Allow array on int8 (Peter E)
|
||||
Fix for rounding/overflow of NUMERIC type, like NUMERIC(4,4) (Tom)
|
||||
Allow NUMERIC arrays
|
||||
Fix bugs in NUMERIC ceil() and floor() functions (Tom)
|
||||
Make char_length()/octet_length including trailing blanks (Tom)
|
||||
Made abstime/reltime use int4 instead of time_t (Peter E)
|
||||
New lztext data type for compressed text fields
|
||||
Revise code to handle coercion of int and float constants (Tom)
|
||||
New C-routines to implement a BIT and BIT VARYING type in /contrib
|
||||
(Adriaan Joubert)
|
||||
NUMERIC now accepts scientific notation (Tom)
|
||||
NUMERIC to int4 rounds (Tom)
|
||||
Convert float4/8 to NUMERIC properly (Tom)
|
||||
Allow type conversion with NUMERIC (Thomas)
|
||||
Make ISO date style (2000-02-16 09:33) the default (Thomas)
|
||||
Add NATIONAL CHAR [ VARYING ]
|
||||
Allow NUMERIC round and trunc to accept negative scales (Tom)
|
||||
New TIME WITH TIME ZONE type (Thomas)
|
||||
Add MAX()/MIN() on time type (Thomas)
|
||||
Add abs(), mod(), fac() for int8 (Thomas)
|
||||
Add round(), sqrt(), cbrt(), pow()
|
||||
Rename NUMERIC power() to pow()
|
||||
Improved TRANSLATE() function
|
||||
Allow X=-Y operators (Tom)
|
||||
Add exp() and ln() as NUMERIC types
|
||||
Allow SELECT float8(COUNT(*)) / (SELECT COUNT(*) FROM int4_tbl) FROM int4_tbl
|
||||
GROUP BY f1; (Tom)
|
||||
|
||||
Performance
|
||||
-----------
|
||||
Prevent exponential space consumption with many AND's and OR's (Tom)
|
||||
Collect attribute selectivity values for system columns (Tom)
|
||||
Reduce memory usage of aggregates (Tom)
|
||||
Fix for LIKE optimization to use indexes with multi-byte encodings (Tom)
|
||||
Fix r-tree index optimizer selectivity (Thomas)
|
||||
Improve optimizer selectivity computations and functions (Tom)
|
||||
Optimize btree searching for cases where many equal keys exist (Tom)
|
||||
Enable fast LIKE index processing only if index present (Tom)
|
||||
Re-use free space on index pages with duplicates (Tom)
|
||||
Improve hash join processing (Tom)
|
||||
Prevent descending sort if result is already sorted(Hiroshi)
|
||||
Allow commuting of index scan query qualifications (Tom)
|
||||
Prefer index scans in cases where ORDER BY/GROUP BY is required (Tom)
|
||||
Allocate large memory requests in fix-sized chunks for performance (Tom)
|
||||
Fix vacuum's performance by reducing memory allocation requests (Tom)
|
||||
Implement constant-expression simplification (Bernard Frankpitt, Tom)
|
||||
Allow more than first column to be used to determine start of index scan
|
||||
(Hiroshi)
|
||||
Prevent quadruple use of disk space when doing internal sorting (Tom)
|
||||
Faster sorting by calling fewer functions (Tom)
|
||||
Create system indexes to match all system caches (Bruce, Hiroshi)
|
||||
Make system caches use system indexes(Bruce)
|
||||
Make all system indexes unique(Bruce)
|
||||
Improve pg_statistics management for VACUUM speed improvement (Tom)
|
||||
Flush backend cache less frequently (Tom, Hiroshi)
|
||||
COPY now reuses previous memory allocation, improving performance (Tom)
|
||||
Improve optimization cost estimation (Tom)
|
||||
Improve optimizer estimate of range queries x > lowbound AND x < highbound (Tom)
|
||||
Use DNF instead of CNF where appropriate (Tom, Taral)
|
||||
Further cleanup for OR-of-AND WHERE-clauses (Tom)
|
||||
Make use of index in OR clauses (x = 1 AND y = 2) OR (x = 2 AND y = 4) (Tom)
|
||||
Smarter optimizer computations for random index page access (Tom)
|
||||
New SET variable to control optimizer costs (Tom)
|
||||
Optimizer queries based on LIMIT, OFFSET, and EXISTS qualifications (Tom)
|
||||
Reduce optimizer internal housekeeping of join paths for speedup (Tom)
|
||||
Major subquery speedup (Tom)
|
||||
|
||||
Source Tree Changes
|
||||
-------------------
|
||||
Fix for linux PPC compile
|
||||
New generic expression-tree-walker subroutine (Tom)
|
||||
Change form() to varargform() to prevent portability problems.
|
||||
Improved range checking for large integers on Alpha's
|
||||
Clean up #include in /include directory (Bruce)
|
||||
Add scripts for checking includes (Bruce)
|
||||
Remove un-needed #include's from *.c files (Bruce)
|
||||
Change #include's to use <> and "" as appropriate (Bruce)
|
||||
Enable WIN32 compilation of libpq
|
||||
Alpha spinlock fix from Uncle George <gatgul@voicenet.com>
|
||||
Overhaul of optimizer data structures (Tom)
|
||||
Fix to cygipc library (Yutaka Tanida)
|
||||
Allow pgsql to work on newer Cygwin snapshots(Dan)
|
||||
New catalog version number (Tom)
|
||||
Add Linux ARM.
|
||||
Rename heap_replace to heap_update
|
||||
Update for QNX (Kardos, Dr. Andreas)
|
||||
New platform-specific regression handling (Tom)
|
||||
Rename oid8 -> oidvector and int28 -> int2vector (Bruce)
|
||||
Included all yacc and lex files into the distribution (Peter E.)
|
||||
Remove lextest, no longer needed (Peter E)
|
||||
Fix for libpq and psql on Win32 (Magnus)
|
||||
Internally change datetime and timespan into timestamp and interval (Thomas)
|
||||
Fix for plpgsql on BSDI
|
||||
Add SQL_ASCII test case to the regression test (Tatsuo)
|
||||
configure --with-mb now deprecated (Tatsuo)
|
||||
NT fixes
|
||||
NetBSD fixes Johnny C. Lam <lamj@stat.cmu.edu>
|
||||
Fixes for Alpha compiles
|
||||
New multibyte encodings
|
||||
</programlisting>
|
||||
</para>
|
||||
</sect2>
|
||||
</sect1>
|
||||
|
||||
<sect1>
|
||||
<title>Release 6.5.3</title>
|
||||
<!--
|
||||
|
|
@ -169,8 +568,8 @@ Add Win1250 (Czech) support (Pavel Behal)
|
|||
</sect1>
|
||||
|
||||
|
||||
<sect1>
|
||||
<title>Release 6.5</title>
|
||||
<sect1>
|
||||
<title>Release 6.5</title>
|
||||
<!--
|
||||
<docinfo>
|
||||
<authorgroup>
|
||||
|
|
@ -442,7 +841,7 @@ Fix for memory leak in executor with fjIsNull
|
|||
Fix for aggregate memory leaks(Erik Riedel)
|
||||
Allow username containing a dash GRANT permissions
|
||||
Cleanup of NULL in inet types
|
||||
Clean up system table bugs(Tom)
|
||||
Clean up system table bugs(Tom)
|
||||
Fix problems of PAGER and \? command(Masaaki Sakaida)
|
||||
Reduce default multi-segment file size limit to 1GB(Peter)
|
||||
Fix for dumping of CREATE OPERATOR(Tom)
|
||||
|
|
|
|||
|
|
@ -5,7 +5,6 @@ doc/Machine-specific FAQ's
|
|||
doc/bug.template
|
||||
update include/version.h.in after release, including subversion
|
||||
update pgaccess
|
||||
update odbc
|
||||
update src/interfaces/jdbc/postgresql/jdbc1/DatabaseMetaData.java
|
||||
update src/interfaces/jdbc/postgresql/jdbc2/DatabaseMetaData.java
|
||||
update pg_upgrade to handle new version, or disable
|
||||
|
|
@ -18,3 +17,4 @@ update documentation
|
|||
man pages
|
||||
sgml docs
|
||||
update VERSION numbers of interfaces
|
||||
update ports list
|
||||
|
|
|
|||
|
|
@ -4,7 +4,7 @@
|
|||
|
||||
# Usage $0 [-r 'revision pattern'] file
|
||||
|
||||
# cvs log -d '>1999-06-14 00:00:00 GMT' > log
|
||||
# cvs log -d '>1999-06-14 00:00:00 GMT' . > log
|
||||
# pgcvslog -r '\.2\.[0-9]*$' log
|
||||
|
||||
if [ "X$1" = "X-r" ]
|
||||
|
|
|
|||
Loading…
Reference in New Issue