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authorBruce Momjian <bruce@momjian.us>1997-09-14 02:09:10 +0000
committerBruce Momjian <bruce@momjian.us>1997-09-14 02:09:10 +0000
commit973a03744c0368ce163e42797faf6456fe199f47 (patch)
tree40a740c6a245f42e590519c334b70b90d2bd3163 /doc
parentba0b03de2e8ef517010f77709eac6de20371d0f3 (diff)
downloadpostgresql-973a03744c0368ce163e42797faf6456fe199f47.tar.gz
Update README, HISTORY, etc for beta release.
Diffstat (limited to 'doc')
-rw-r--r--doc/FAQ60
-rw-r--r--doc/TODO33
-rw-r--r--doc/bug.template2
3 files changed, 38 insertions, 57 deletions
diff --git a/doc/FAQ b/doc/FAQ
index 95c8721811..873bcb5c85 100644
--- a/doc/FAQ
+++ b/doc/FAQ
@@ -1,8 +1,8 @@
Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Thu Sep 4 01:32:22 EDT 1997
- Version: 6.1.1
+ Last updated: Sat Sep 13 22:00:02 EDT 1997
+ Version: 6.2beta
Current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
@@ -90,6 +90,7 @@ Questions answered:
3.21) What is the meaning of some of the terms used in Postgres?
3.22) What is Genetic Query Optimization?
3.23) How do you remove a column from a table?
+ 3.24) How do SELECT only the first few rows of a query?
4) Questions about extending PostgreSQL
@@ -514,24 +515,7 @@ Section 3: PostgreSQL Features
3.6) What is the exact difference between binary cursors and normal cursors?
- Normal cursors return data back in ASCII format. Since data is stored
- natively in binary format, the system must do a conversion to produce
- the ASCII format. In addition, ASCII formats are often large in size
- than binary format. Once the attributes come back in ASCII, often the
- client application then has to convert it to a binary format to
- manipulate it anyway.
-
- Binary cursors give you back the data in the native binary
- representation. Thus, binary cursors will tend to be a little faster
- since there's less overhead of conversion.
-
- However, ASCII is architectural neutral whereas binary representation
- can differ between different machine architecture. Thus, if your
- client machine uses a different representation than you server
- machine, getting back attributes in binary format is probably not what
- you want. Also, if your main purpose is displaying the data in ASCII,
- then getting it back in ASCII will save you some effort on the client
- side.
+ See the declare manual page for a description.
3.7) What is a R-tree index and what is it used for?
@@ -590,24 +574,12 @@ Section 3: PostgreSQL Features
3.10) How do I do regular expression searches? case-insensitive regexp
searching?
- PostgreSQL supports the SQL LIKE syntax as well as more general
- regular expression searching with the ~ operator. The !~ is the
- negated regexp operator. ~* and !~* are the case-insensitive regular
- expression operators.
+ See the pgbuiltin manual page. Search for regular expression.
3.11) I experienced a server crash during a vacuum. How do I remove the lock
file?
- If the server crashes during a vacuum command, chances are it will
- leave a lock file hanging around. Attempts to re-run the vacuum
- command result in
-
-
- WARN:can't create lock file -- another vacuum cleaner running?
-
- If you are sure that no vacuum is actually running, you can remove the
- file called "pg_vlock" in your database directory (which is
- $PGDATA/base/<dbName>)
+ See the vacuum manual page.
3.12) What is the difference between the various character types?
@@ -638,10 +610,8 @@ BYTEA bytea variable-length array of bytes
3.14) How do I see how the query optimizer is evaluating my query?
- Place the word 'EXPLAIN' at the beginning of the query, for example:
-
- EXPLAIN SELECT * FROM table1 WHERE age = 23;
-
+ See the explain manual page.
+
3.15) How do I create a serial field?
Postgres does not allow the user to specifiy a user column as type
@@ -683,6 +653,7 @@ BYTEA bytea variable-length array of bytes
The default configuration allows only connections from tcp/ip host
localhost. You need to add a host entry to the file pgsql/data/pg_hba.
+ See the hba_conf manual page.
3.18) How do I find out what indexes or operations are defined in the
database?
@@ -769,11 +740,20 @@ BYTEA bytea variable-length array of bytes
We do not support ALTER TABLE DROP COLUMN, but do this:
- SELECT ... # select all columns but the one you want to remove
+ SELECT ... -- select all columns but the one you want to remove
INTO TABLE new_table
FROM old_table;
DROP TABLE old_table;
ALTER TABLE new_table RENAME TO old_table;
+
+ 3.23) How do SELECT only the first few rows of a query?
+
+ See the fetch manual page.
+
+ This only prevents all row results from being transfered to the
+ client. The entire query must be evaluated, even if you only want just
+ first few rows. Consider a query that has and ORDER BY. There is no
+ way to return any rows until the entire query is evaluated and sorted.
_________________________________________________________________
Section 4: Extending PostgreSQL
@@ -819,4 +799,4 @@ Section 5: Bugs
You can also fill out the "bug-template" file and send it to:
* bugs@postgreSQL.org
- This is the address of the developers mailing list.
+ This is the address of the developers mailing list.
diff --git a/doc/TODO b/doc/TODO
index d5899e09a7..74f4e7b8ea 100644
--- a/doc/TODO
+++ b/doc/TODO
@@ -1,7 +1,7 @@
====================================================
TODO list (FAQ) for PostgreSQL
====================================================
-last updated: Mon Jul 21 18:01:37 EDT 1997
+last updated: Sat Sep 13 22:00:05 EDT 1997
current maintainer: Bruce Momjian (maillist@candle.pha.pa.us)
@@ -25,6 +25,7 @@ Developers who have claimed items are:
Martin is Martin S. Utesch <utesch@aut.tu-freiberg.de>
Oleg is Oleg Bartunov <oleg@sai.msu.su>
Paul is Paul M. Aoki <aoki@CS.Berkeley.EDU>
+ Patrick is Patrick van Kleef <pvk@pobox.com>
Raymond is Raymond Toy <toy@rtp.ericsson.se>
Soo-Ho Ok <shok@detc.dongeui-tc.ac.kr>
Stefan Simkovics <ssimkovi@rainbow.studorg.tuwien.ac.at>
@@ -38,17 +39,15 @@ RELIABILITY
-----------
-Overhaul mdmgr/smgr to fix double unlinking and double opens, cleanup(Erich)
-Overhaul bufmgr/lockmgr/transaction manager(Vadim)
-remove -S (stable memory) option or fix memory manager
Fix CLUSTER
+Remove EXTEND?
Fix all NULL features
allow psql to print nulls meaningfully
Fix compile and security of Kerberos/GSSAPI code (Daniel Kalchev?)
-Dropping a table twice causes corruption, drop/create not rollback-able
COUNT on VIEW always returns zero (maybe because there is no oid for views?)
CREATE VIEW requires super-user priviledge
SELECT a[1] FROM test fails, it needs test.a[1]
INSERT INTO ... SELECT DISTINCT ... generates error on DISTINCT
-pg_database.datdba is oid, should be int4
can lo_export()/lo_import() read/write anywhere, causing a security problem?
Fix UPDATE key_table SET keyval=max(reftab.NUM)+1 WHERE tblname='reftab'
SELECT COUNT(*) FROM TAB1, TAB2 fails
@@ -56,6 +55,14 @@ Tables that start with xinv confused to be large objects
Two and three dimmensional arrays display improperly, missing {}
Add GROUP BY and HAVING to INSERT INTO table SELECT * FROM table2
Make timestamp type recognize DateStyle(Tom)
+SELECT SUM(2+2) FROM table dumps core
+lo_unlink() crashes server
+UPDATE table SET table.value = 3 fails
+Allow variable casts with BETWEEN 'today'::asbtime AND 'today'::abstime
+Prevent auto-table reference, like SELECT table.col WHERE col = 3 (?)
+Remove un-needed malloc() calls and replace with palloc().
+SELECT * FROM table WHERE int4_column = '1' fails
+Allow INSERT INTO table SELECT id, count(*) FROM table2 GROUP BY id
ENHANCEMENTS
------------
@@ -66,16 +73,15 @@ Add full ANSI SQL capabilities (Stefan)
column constraints (using rules), PRIMARY KEY during table creation
add DEFAULT, RESTRAINT, and CHECK capabilities
report "Not implemented" if valid syntax is supplied
- add NOT NULL to CREATE statement
- add OUTER joins, left and right
+ add OUTER joins, left and right (Thomas)
make VIEWs updateable where possible
add UNIONS, INTERSECTS, SUBTRACTS
add temporary tables
- add assertions
- add domains
add sql3 recursive unions
add the concept of dataspaces
allow conversion type casts on SELECT target fields
+ add DECIMAL, NUMERIC, DOUBLE PRECISION, BIT, BIT VARYING
+ NCHAR (as distinguished from ordinary varchar),
Allow compression of large fields or a compressed field type
Fix the rules system(Jan?,Soo-Ho)
robust
@@ -92,7 +98,6 @@ Large objects
Better interface for adding to pg_group
Make MONEY/DECIMAL have a defined precision
Add support for tables >2G, or test current version
-Incorporate the PERL PG95 interface library into source tree(Edmund)
Threaded version of the server or libpq
Allow libpq to cancel query requests
Add REGEX internationalization
@@ -122,13 +127,13 @@ Add STDDEV/VARIANCE() function for standard deviation computation/variance
Add table/column/function discription table indexed by oid
add pg_type attribute to identify types that need length (bpchar, varchar)
add UNIQUE capability to non-btree indexes
-make pg_dumpall preserve table ownership, not just database ownership
make large objects have their own reltype
make number of backends a config parameter, storage/sinvaladt.h:MaxBackendId
certain indexes will not shrink, i.e. oid indexes with many inserts
make NULL's come out at the beginning or end depending on the ORDER BY direction
change the library/backend interface to use network byte order
allow unix domain sockets for local connections for performance and security
+Make operators for float8/int4 arithmetic
PERFORMANCE
-----------
@@ -136,9 +141,6 @@ Optimizing disjunctive queries
Fix bushy-plans (Martin)
Other optimizer bugs
Is fsync use optimized?
-Multi-representational types, a la Illustra. For example, have a
- text type that is stored in-tuple when less than 8K and in large
- objects, when greater than 8K.
Use indexes in ORDER BY
Profile engine in INSERT's and other operations
Cache most recent query plan(s?)
@@ -146,16 +148,15 @@ Allow compression of log and meta data
Allow LIKE/wildcard matches to use indexes if the wildcard character is not first
Add FILLFACTOR to index creation
Allow indexes to be used with OR clauses(Vadim)
-Change pg_attribute.attnvals name to attdispursion and change type float4
- update pg_statistic table to remove operator column
+update pg_statistic table to remove operator column
DOCUMENTATION
-------------
Update usermanual source(many)
remove time-travel in documentation(Bruce)
added features used in grammer but not in docs, like :: and CAST
-add DECLARE manual page
update libpq++ manual page
+Add pg_password manual page
PORTABILITY
-----------
diff --git a/doc/bug.template b/doc/bug.template
index 577e07eb1c..3e6aa858ab 100644
--- a/doc/bug.template
+++ b/doc/bug.template
@@ -27,7 +27,7 @@ System Configuration
Operating System (example: Linux 2.0.26 ELF) :
- PostgreSQL version (example: PostgreSQL-6.1) : PostgreSQL-6.1
+ PostgreSQL version (example: PostgreSQL-6.2) : PostgreSQL-6.2
Compiler used (example: gcc 2.7.2) :