When I explain SELECT MAX(o_id)-1 FROM orders,it tell me Select
tables optimized away.What is it meaning?It show me good or bad?
thanks!
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MySQL General
NO effect :-(
From: pow [EMAIL PROTECTED]
To: 王 旭 [EMAIL PROTECTED]
Subject: Re: optimize a sql statement
Date: Mon, 18 Jul 2005 11:51:23 +0800
Do u have composite index on order_line.ol_o_id AND order_line.ol_i_id?
You could try that...
王 旭 wrote:
Now,I make this sql statement to easy.
Follow is the sql statement:
explain SELECT ol_i_id
FROM orders, order_line
WHERE orders.o_id = order_line.ol_o_id and o_id0
ORDER BY SUM(ol_qty)DESC
Follow is the explain output:
Hello.
It is a hard task to answer if we don't see your queries and tables'
structure. Sometimes several small queries could be faster than a big
one. For example, often, query with subqueries or union runs slower than
few queries which use temporary tables.
Octavian Rasnita [EMAIL
Hello.
[EMAIL PROTECTED] gleb]$ perror 12
OS error code 12: Cannot allocate memory
Very often it is ulimits problem. Check if your server has enough memory
as well. The cause of problem sometime might be unofficial binaries. If
nothing helps, switch to binaries from MySQL AB.
Hello.
Building MySQL Server manually could be a thankless and painful work.
You should have the same build environment as MySQL AB team. Use
official binaries.
Peregrine [EMAIL PROTECTED] wrote:
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Hello,
Hello.
Similar questions were asked in the list before. For example
see:
http://lists.mysql.com/mysql/41542
Search in archives at:
http://lists.mysql.com/mysql
From sources I've found that this message appears when optimizing
queries with count(*), min() and max(). The above
Hello!
Peregrine wrote:
[[...]]
While trying to build RPMs for 5.0.9-beta, I have run into this error:
[[...]]
Starting Tests
TESTRESULT
---
alias [ pass ]
Well, if you got this far,
Hello.
I've searched in the archives at:
http://lists.mysql.com/mysql
but the only thing I've found is that the speed difference is rather low. In my
opinion, using UNION is a more flexible solution.
pow [EMAIL PROTECTED] wrote:
Hi everyone,
Take for example two identical
Dear MySQL,
I have need to use VIEWS. (This is to protect my database from
programmers, but that's another story :)
This is available in version 5.0.1, which is not at release level yet.
We are on 4.1.9.
May I ask a couple of questions!
Approximately when will 5.0.1 be available as stable
Hi Ben!
Ben Clewett wrote:
[[...]]
Approximately when will 5.0.1 be available as stable release?
5.0.1 will never change, it is out (and obsolete by now).
You probably refer to the 5.0 family of releases, of which 5.0.9-beta
was published last week.
The 5.0 releases have to pass the beta
Hello all,
This may be a little bit off topic for MySQL newsgroup but here goes.I'm
trying to retrieve variables such as basedir and datadir. PERL/DBI returns 2
rows for each varialbe. The first is the name and the second is a value. Is
there a way to get PERL/DBI to return each variable
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Hash: SHA1
I have a query that uses a subquery that works under mysql 4.1 and
5.0.6, but doesn't work on 5.0.7 or 5.0.9
I am trying to understand why it may be having a problem so I can make a
test case to demonstrate it, and am hoping that someone may have an
Don't look at it as a string, you're not searching on a string. What
you are actually searching on is a range of dates, the first of the
month through the end of the month. That will keep your data in a
date format and use the index.
SELECT ... WHERE date between
Jonathan Mangin wrote:
Hello all,
I'm storing data from a series of tests throughout each
24-hour period. I thought to create a table for each test.
(There are six tests, lots more cols per test, and many
users performing each test.)
But each test is performed no more than once per day by
hi,
we've got an old mysql-3.23.58 and a new mysql-4.1.10a and we'de like to
migrate our data, but it doesn't seems to be so easy:-(
out old server has a latin2 database. after we dump it and try tp import
into the new ones we always got errors or the spical accented hungarian
characters are
Joerg,
I am trying to work out how stable 5.0.x is. Related to why MySQL
advise people to wait for the 'release' status.
You say 5.0.1 is old and obsolete. Yet is not at release stage yet.
This is curious.
Will 5.0.1 be changed before release? For example: Will large errors
(eg,
Hello List,
I've tried to set up a slave from an existing master using innobackup.
The copy of the database was successful, but when I started the
replication, the following error occured:
Illegal mix of collations (latin1_bin,IMPLICIT) and
(utf8_general_ci,COERCIBLE) for operation '='' on
Hi Mihail,
We have nightly process that creates a summary table from multiple tables in
the similar situation.
Best,
Mihail Berman
-Original Message-
From: Михаил Монашёв [mailto:[EMAIL PROTECTED]
Sent: Sunday, July 17, 2005 3:41 AM
To: mysql@lists.mysql.com
Subject: Multitable
Hi,
I think you may be getting confused with the version 5 'releases' available.
It helps to understand the MySQL release cycle a little bit and then it may
become clearer.
Basically, version 5 is in alpha and beta stages at the moment which means
that the developers are very actively working on
hi,
how to create a log file of the updates done on the data in visual basic or
in mysql for a particular record
for example
i have a purchase order record in which my junior changes say rate without
my knowledge how will i know what has been changed
p rao
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MySQL General Mailing List
For
Ben Clewett wrote:
Joerg,
I am trying to work out how stable 5.0.x is. Related to why MySQL
advise people to wait for the 'release' status.
You say 5.0.1 is old and obsolete. Yet is not at release stage yet.
This is curious.
Will 5.0.1 be changed before release? For example: Will
Kevin,
What you are overlooking is that 4294967298 is outside the range of Java's
int--it's 0x10002. So, when it's converted to int, the high order bit
gets discarded, and you are left with a result of 2. JDBC behaves as would
be expected.
public class TestLong {
final public static
Bill,
Thank you for this. While that is true, the problem is that the number
in the database is actually 2 and not 4294967298. It seems the
connector/j is sticking that highest bit in there itself, or misbehaving
in some other way.
Apparently it has been fixed just hasn't been released
Make sure your disks are all redundant -- get two of each and mirror
them. You'll thank yourself when a drive dies.
If the database server has any uptime requirements, I recommend going
hotswap for everything -- you'll thank yourself again when you can
swap the drive out during core business
enable the bin log in mysql. It doesn't log transactions i.e. what it
was, what it became, but the update will be logged
prathima rao wrote:
hi,
how to create a log file of the updates done on the data in visual basic or
in mysql for a particular record
for example
i have a purchase order
Brent Baisley wrote:
Don't look at it as a string, you're not searching on a string. What
you are actually searching on is a range of dates, the first of the
month through the end of the month. That will keep your data in a date
format and use the index.
SELECT ... WHERE date between
Is it possible for mysqld to reload its configuration files without
doing an explicit stop/start? I've searched the online documentation
plus my copy of the DuBois book to no avail.
The fact that the Debian init scripts don't do a proper config reload
(just the GRANT tables) does not give me
Does it posible to set a user previlage to table wise!! Rather then a Whole
Database.
--
Aiby
Please keep this on the list.
Chris Fonnesbeck wrote:
Something seems rather screwed up; I was starting from scratch by
revoking all privileges from joe and deleting him. I got the
following:
mysql REVOKE ALL PRIVILEGES ON *.* FROM 'joe'@'localhost';
Query OK, 0 rows affected (0.00 sec)
Good Morning:
I have finally gotten my MySQL server up and running. However, I am
having a bit of difficulty getting connected.
I am using Dreamweaver to construct PHP pages for dynamic data, and
phpMyAdmin to manage the databases, however when I try to connect by
either method, I get a message
[EMAIL PROTECTED] wrote:
mysql create function betatouni returns string soname 'libbeta2.so';
ERROR 1026 (HY000): Error writing file 'mysql.func' (errno: 121)
Using perror from Linux, I saw:
$ perror 121
Error code 121: Remote I/O error
You probably have communications problems.
Maybe you
How do I rename a database? The help online is pretty ambigous.
--
Power to people, Linux is here.
Here is one way.
Some time ago I set up a table named count with one field named count
and built 5000 rows of incrementing values .
I think I originally populated it by originally createing it with a 2nd
field
CREATE TABLE `count` (
`count` int(10) unsigned NOT NULL auto_increment,
On Mon, Jul 18, 2005 at 10:33:49AM +0300, Gleb Paharenko wrote:
[EMAIL PROTECTED] gleb]$ perror 12
OS error code 12: Cannot allocate memory
Very often it is ulimits problem. Check if your server has enough memory
as well. The cause of problem sometime might be unofficial binaries. If
James Black [EMAIL PROTECTED] wrote on 07/18/2005 08:42:31 AM:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
I have a query that uses a subquery that works under mysql 4.1 and
5.0.6, but doesn't work on 5.0.7 or 5.0.9
I am trying to understand why it may be having a problem so I can make
Aiby [EMAIL PROTECTED] wrote on 07/18/2005 11:15:26 AM:
Does it posible to set a user previlage to table wise!! Rather then a
Whole
Database.
--
Aiby
Yes! You can even determine permissions for specific columns, if you
really want to.
Details here:
Scott Hamm [EMAIL PROTECTED] wrote on 07/18/2005 12:01:49 PM:
How do I rename a database? The help online is pretty ambigous.
--
Power to people, Linux is here.
I wouldn't say ambiguous. I would rather say indirect.
Renaming a database is nearly the same thing as moving tables to a new
A database in MySQL is simply a directory.
So just rename the directory with appropriate tool for your platform.
On my test box this becomes
mysql show databases;
++
| Database
|
++
| information_schema |
|
lois
|
| mailprint |
|
I am getting two different results for the same set of commands on two
different versions of MySQL.
Can anyone explain what the issue is?
CREATE TABLE `testdecimal` (
`rate` decimal(7,4) NOT NULL default '0.'
) ENGINE=MyISAM;
INSERT INTO testdecimal SET rate=1468;
select * from
On 7/16/05, Jonathan Mangin [EMAIL PROTECTED] wrote:
Hello all,
I'm storing data from a series of tests throughout each
24-hour period. I thought to create a table for each test.
(There are six tests, lots more cols per test, and many
users performing each test.)
select test1.date,
Thanks for replying. Some doc pages pertaining to this are:
http://dev.mysql.com/doc/mysql/en/dynamic-system-variables.html
http://dev.mysql.com/doc/mysql/en/system-variables.html
Unfortunately I need to change some that are not dynamic. Many (most?)
servers offer this functionality; it would
Hello.
I don't know a general way to force MySQL Server to reread it's
configuration file, however you could dynamically change lots
of variables using SET @@global.xx syntax. FLUSH command could be
helpful as well. See:
http://dev.mysql.com/doc/mysql/en/system-variables.html
I have notices some slow queries showing up in my slow query log lately.
Two of these queries are relatively simple queries using the index of
their respective tables. Both of these tables are very large and I
suspect this to be the problem. This problem appears to have started
within the last
In the last episode (Jul 18), shantanu oak said:
I am getting two different results for the same set of commands on
two different versions of MySQL. Can anyone explain what the issue
is?
CREATE TABLE `testdecimal` (
`rate` decimal(7,4) NOT NULL default '0.'
) ENGINE=MyISAM;
INSERT
Hi Ben, all!
Ben Clewett wrote ((re-ordered into posting sequence)):
Joerg Bruehe wrote:
Hi Ben!
Ben Clewett wrote:
[[...]]
Approximately when will 5.0.1 be available as stable release?
5.0.1 will never change, it is out (and obsolete by now).
[[...]]
I am trying to work out how
Is because 7 is the size of the record, and 4 is the size of the decimals
so:
Decimal(7,4) can allocate only 999.
If you want to allocate 1468 then you must declare as decimal(8,4) to 4
decimals and 4 integers in version 5 is the same as oracle
The first parameter is the total number
hi,
we've got an old mysql-3.23.58 and a new mysql-4.1.10a and we'de
like to
migrate our data, but it doesn't seems to be so easy:-(
out old server has a latin2 database. after we dump it and try tp
import
into the new ones we always got errors or the spical accented
hungarian
characters
Hello.
Illegal mix of collations (latin1_bin,IMPLICIT) and
(utf8_general_ci,COERCIBLE) for operation '='' on query. Default
What default charset do your slave's tables have? The coercibility
value of system constants has changed in 4.1.11. Though it seems not
related to your problem I
I need to use crystal reports with MySQL database. We have MySQL
query browser to query audit database of meta directory. Can I use ODBC
connection for my crystal report with MySQL database? If yes, then please
let me know what ODBC driver I need to install? OR how can I make
connection to
Hello.
See:
http://dev.mysql.com/doc/mysql/en/access-denied.html
Tim Holmes [EMAIL PROTECTED] wrote:
Good Morning:
I have finally gotten my MySQL server up and running. However, I am
having a bit of difficulty getting connected.
I am
shantanu oak [EMAIL PROTECTED] wrote on 07/18/2005 01:17:57 PM:
I am getting two different results for the same set of commands on two
different versions of MySQL.
Can anyone explain what the issue is?
CREATE TABLE `testdecimal` (
`rate` decimal(7,4) NOT NULL default '0.'
)
Hello.
What about using SELECT @@global.xxx? It returns only one column. See:
mysql select @@global.old_passwords;
++
| @@global.old_passwords |
++
| 1 |
++
[EMAIL PROTECTED] wrote:
Hi,
You simply install the MyODBC interface and away you go. You simply create a
connect and Us crystal as if it was a connection to the other windows
database. hahaha
I have included the link below:
http://dev.mysql.com/downloads/connector/odbc/3.51.html
Scott.
[EMAIL PROTECTED]
www.Wilty.ca
There is a limit, but that is really limited to the hardware you are
running it on. You need to figure out what part of your system is
bottlenecking (disk I/O, RAM, CPU, or network I/O). Perhaps you have
to little RAM and/or your mysql configuration variables are not set
optimally. Too
Hi Gleb,
Please check, if putting of these lines into my.cnf solves the
problem:
[dbdmysql]
default-character-set = ujis
Yupe! It works. Thank you very much :)
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On Monday 18 July 2005 02:09am, Gleb Paharenko wrote:
Hello.
Building MySQL Server manually could be a thankless and painful work.
You should have the same build environment as MySQL AB team. Use
official binaries.
Thank you for your advice, though you have not attempted to answer my
On 7/18/05, Michael Stassen [EMAIL PROTECTED] wrote:
Hmmm... In that case, I have more questions. Log in as root and run
SHOW VARIABLES LIKE '%pass%';
DESC user password;
and post the results.
Also, was this a brand new installation, or an upgrade? If an upgrade, from
what
On Monday 18 July 2005 03:06am, Joerg Bruehe wrote:
Hello!
Peregrine wrote:
[[...]]
While trying to build RPMs for 5.0.9-beta, I have run into this error:
[[...]]
Starting Tests
TESTRESULT
---
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