RE: mysqldump backup
>-Original Message- >From: Raj Shekhar [mailto:rajl...@rajshekhar.net] >Sent: Friday, May 28, 2010 2:40 PM >To: mysql@lists.mysql.com >Cc: mysql@lists.mysql.com >Subject: Re: mysqldump backup > >In infinite wisdom Angelina Paul wrote: > >> [1 ] >> I looking for a way to corrupt a mysql database forcefully for testing >> purpose >> and then the mysqldump utility will fail for taking backup against it. > >kill -9 MYSQLD_PID while the backup is running should give you an >indication. > [JS] If you know the file name of one of your databases, how about just using the cat (*nix) or copy (Windows) command to trash a little bit of it. Regards, Jerry Schwartz Global Information Incorporated 195 Farmington Ave. Farmington, CT 06032 860.674.8796 / FAX: 860.674.8341 www.the-infoshop.com > >-- >Raj Shekhar >- >If there's anything more important than my ego around, I want it >caught and shot now. > > > >-- >MySQL General Mailing List >For list archives: http://lists.mysql.com/mysql >To unsubscribe:http://lists.mysql.com/mysql?unsub=je...@gii.co.jp -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Using RAND to get a unique ID that has not been used yet
The separate table for the IDs is probably best solution, maybe counting on caching of the table with an index on the id value to speed up the 'where' clause; this checks what numbers are left instead of what numbers have been used; the disadvantage is that you have to manage a second table with a million rows! You could generate a memory table when you open the session, populate it with all possible values and then delete all already assigned values. You would have to do this only once and then all possible unused values would be available. It shouldn't get slower with time (in fact it might speed up as the used rows are progressively deleted). It has the advantage that the random function is called only once: whereas using a single table requires looping until a unique random value is found, and as the table fills this will get really slow. - Original Message - From: "Jerry Schwartz" To: "'Andre Matos'" ; "'Steven Staples'" Cc: Sent: Friday, May 28, 2010 6:51 PM Subject: RE: Using RAND to get a unique ID that has not been used yet -Original Message- From: Andre Matos [mailto:andrema...@mineirinho.org] Sent: Friday, May 28, 2010 1:44 PM To: Steven Staples Cc: mysql@lists.mysql.com Subject: Re: Using RAND to get a unique ID that has not been used yet It seems to be a good approach, although I was trying to get this by querying the table without creating another table to keep the Ids. [JS] That would be a VERY bad idea. My predecessor designed our system that way: it would generate a random key, check to see if that key were in use, and either use it or try again. As you would expect, the whole process get slower and slower as we "ran out" of unique keys. Eventually the whole application became unusable. Regards, Jerry Schwartz Global Information Incorporated 195 Farmington Ave. Farmington, CT 06032 860.674.8796 / FAX: 860.674.8341 www.the-infoshop.com Thanks, Andre -- Andre Matos andrema...@mineirinho.org On 2010-05-28, at 12:15 PM, Steven Staples wrote: If you wanted to use/go that route, then why not select a random limit 1 from that table, and then delete that row? SELECT `column` FROM `table` ORDER BY RAND() LIMIT 1; On a side note, I would use the auto-inc field still, and store this number in another field. Steven Staples -Original Message- From: Jim Lyons [mailto:jlyons4...@gmail.com] Sent: May 28, 2010 11:49 AM To: Andre Matos Cc: mysql@lists.mysql.com Subject: Re: Using RAND to get a unique ID that has not been used yet If your specs are that specific (IDs must be between 1 and 99) then you could create a 99-row table with one integer column and prefill it with the numbers 1 to 99 in random order. Then you could write a function that would select and return the first number in the table, then delete that record so you would not reuse it. Once you've done the work of sorting 99 numbers in random order (which can be done anywhich way) it's easy and you don't have to loop an indeterminant number of times. You would be looping an increasing number of times as you begin to fill up the table. Jim On Fri, May 28, 2010 at 10:38 AM, Andre Matos wrote: Hi All, I have a table that uses auto_increment to generate the Id automatically working fine. However, I need to create a new table where the Id must be a number generated randomly, so I cannot use the auto_increment. MySQL has a function RAND. So I could use something like this: SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable But, let's suppose that the RandId is a number that was already used in the table. Then I need to run the SELECT again and again until I find a number that hasn't been used. Is there a way to have this SELECT to loop until it finds a number that hasn't been used? The RandId must be only numbers and length of 6 (from 1 to 99). No other character is allowed. Thanks for any help! Andre -- Andre Matos andrema...@mineirinho.org -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=jlyons4...@gmail.com -- Jim Lyons Web developer / Database administrator http://www.weblyons.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=sstap...@mnsi.net No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2895 - Release Date: 05/28/10 02:25:00 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=andrema...@mineirinho.org -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=je...@gii.co.jp -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?uns
Re: mysqldump backup
In infinite wisdom Angelina Paul wrote: > [1 ] > I looking for a way to corrupt a mysql database forcefully for testing > purpose > and then the mysqldump utility will fail for taking backup against it. kill -9 MYSQLD_PID while the backup is running should give you an indication. -- Raj Shekhar - If there's anything more important than my ego around, I want it caught and shot now. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Using RAND to get a unique ID that has not been used yet
On Fri, May 28, 2010 at 11:38 AM, Andre Matos wrote: > I have a table that uses auto_increment to generate the Id automatically > working fine. > However, I need to create a new table where the Id must be a number generated > randomly, so I cannot use the auto_increment. You'd be better off using UUID in my opinion. - Perrin -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Using RAND to get a unique ID that has not been used yet
When I mentioned having everything in the Query, I was thinking about this. I don't want to have a loop repeating the query until I get a unique Id. This is ridicules and imagine how many queries I might end up running. No way! Thanks for the warning and feedback! Andre -- Andre Matos andrema...@mineirinho.org On 2010-05-28, at 1:51 PM, Jerry Schwartz wrote: > >> -Original Message- >> From: Andre Matos [mailto:andrema...@mineirinho.org] >> Sent: Friday, May 28, 2010 1:44 PM >> To: Steven Staples >> Cc: mysql@lists.mysql.com >> Subject: Re: Using RAND to get a unique ID that has not been used yet >> >> It seems to be a good approach, although I was trying to get this by querying >> the table without creating another table to keep the Ids. >> > [JS] That would be a VERY bad idea. My predecessor designed our system that > way: it would generate a random key, check to see if that key were in use, > and > either use it or try again. > > As you would expect, the whole process get slower and slower as we "ran out" > of unique keys. Eventually the whole application became unusable. > > Regards, > > Jerry Schwartz > Global Information Incorporated > 195 Farmington Ave. > Farmington, CT 06032 > > 860.674.8796 / FAX: 860.674.8341 > > www.the-infoshop.com > > > > >> Thanks, >> >> Andre >> >> -- >> Andre Matos >> andrema...@mineirinho.org >> >> >> >> >> On 2010-05-28, at 12:15 PM, Steven Staples wrote: >> >>> If you wanted to use/go that route, then why not select a random limit 1 >>> from that table, and then delete that row? >>> >>> SELECT `column` FROM `table` ORDER BY RAND() LIMIT 1; >>> >>> >>> On a side note, I would use the auto-inc field still, and store this number >>> in another field. >>> >>> Steven Staples >>> >>> >>> -Original Message- From: Jim Lyons [mailto:jlyons4...@gmail.com] Sent: May 28, 2010 11:49 AM To: Andre Matos Cc: mysql@lists.mysql.com Subject: Re: Using RAND to get a unique ID that has not been used yet If your specs are that specific (IDs must be between 1 and 99) then you could create a 99-row table with one integer column and prefill it with the numbers 1 to 99 in random order. Then you could write a function that would select and return the first number in the table, then delete that record so you would not reuse it. Once you've done the work of sorting 99 numbers in random order (which can be done anywhich way) it's easy and you don't have to loop an indeterminant number of times. You would be looping an increasing number of times as you begin to fill up the table. Jim On Fri, May 28, 2010 at 10:38 AM, Andre Matos wrote: > Hi All, > > I have a table that uses auto_increment to generate the Id automatically working fine. However, I need to create a new table where the Id must be a number generated randomly, so I cannot use the auto_increment. > > MySQL has a function RAND. So I could use something like this: > > SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable > > But, let's suppose that the RandId is a number that was already used in the table. Then I need to run the SELECT again and again until I find a number that hasn't been used. > > Is there a way to have this SELECT to loop until it finds a number that hasn't been used? > > The RandId must be only numbers and length of 6 (from 1 to 99). No other character is allowed. > > Thanks for any help! > > Andre > > -- > Andre Matos > andrema...@mineirinho.org > > > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=jlyons4...@gmail.com > > -- Jim Lyons Web developer / Database administrator http://www.weblyons.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=sstap...@mnsi.net No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2895 - Release Date: 05/28/10 02:25:00 >>> >>> >>> -- >>> MySQL General Mailing List >>> For list archives: http://lists.mysql.com/mysql >>> To unsubscribe: >> http://lists.mysql.com/mysql?unsub=andrema...@mineirinho.org >>> >> >> >> -- >> MySQL General Mailing List >> For list archives: http://lists.mysql.com/mysql >> To unsubscribe:http://lists.mysql.com/mysql?unsub=je...@gii.co.jp > > > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: > http://lists.mysql.com/mysql?unsub=andrema...@mineirinho.org > -- MySQL General Mailing List For lis
RE: Using RAND to get a unique ID that has not been used yet
>-Original Message- >From: Andre Matos [mailto:andrema...@mineirinho.org] >Sent: Friday, May 28, 2010 1:44 PM >To: Steven Staples >Cc: mysql@lists.mysql.com >Subject: Re: Using RAND to get a unique ID that has not been used yet > >It seems to be a good approach, although I was trying to get this by querying >the table without creating another table to keep the Ids. > [JS] That would be a VERY bad idea. My predecessor designed our system that way: it would generate a random key, check to see if that key were in use, and either use it or try again. As you would expect, the whole process get slower and slower as we "ran out" of unique keys. Eventually the whole application became unusable. Regards, Jerry Schwartz Global Information Incorporated 195 Farmington Ave. Farmington, CT 06032 860.674.8796 / FAX: 860.674.8341 www.the-infoshop.com >Thanks, > >Andre > >-- >Andre Matos >andrema...@mineirinho.org > > > > >On 2010-05-28, at 12:15 PM, Steven Staples wrote: > >> If you wanted to use/go that route, then why not select a random limit 1 >> from that table, and then delete that row? >> >> SELECT `column` FROM `table` ORDER BY RAND() LIMIT 1; >> >> >> On a side note, I would use the auto-inc field still, and store this number >> in another field. >> >> Steven Staples >> >> >> >>> -Original Message- >>> From: Jim Lyons [mailto:jlyons4...@gmail.com] >>> Sent: May 28, 2010 11:49 AM >>> To: Andre Matos >>> Cc: mysql@lists.mysql.com >>> Subject: Re: Using RAND to get a unique ID that has not been used yet >>> >>> If your specs are that specific (IDs must be between 1 and 99) >>> then you could create a 99-row table with one integer column and >>> prefill it with the numbers 1 to 99 in random order. >>> >>> Then you could write a function that would select and return the first >>> number in the table, then delete that record so you would not reuse >>> it. >>> >>> Once you've done the work of sorting 99 numbers in random order >>> (which can be done anywhich way) it's easy and you don't have to loop >>> an indeterminant number of times. You would be looping an increasing >>> number of times as you begin to fill up the table. >>> >>> Jim >>> >>> On Fri, May 28, 2010 at 10:38 AM, Andre Matos >>> wrote: Hi All, I have a table that uses auto_increment to generate the Id automatically >>> working fine. However, I need to create a new table where the Id must be a >>> number generated randomly, so I cannot use the auto_increment. MySQL has a function RAND. So I could use something like this: SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable But, let's suppose that the RandId is a number that was already used in >>> the table. Then I need to run the SELECT again and again until I find a >>> number that hasn't been used. Is there a way to have this SELECT to loop until it finds a number that >>> hasn't been used? The RandId must be only numbers and length of 6 (from 1 to 99). No >>> other character is allowed. Thanks for any help! Andre -- Andre Matos andrema...@mineirinho.org -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: >>> http://lists.mysql.com/mysql?unsub=jlyons4...@gmail.com >>> >>> >>> >>> -- >>> Jim Lyons >>> Web developer / Database administrator >>> http://www.weblyons.com >>> >>> -- >>> MySQL General Mailing List >>> For list archives: http://lists.mysql.com/mysql >>> To unsubscribe:http://lists.mysql.com/mysql?unsub=sstap...@mnsi.net >>> >>> No virus found in this incoming message. >>> Checked by AVG - www.avg.com >>> Version: 9.0.819 / Virus Database: 271.1.1/2895 - Release Date: 05/28/10 >>> 02:25:00 >> >> >> -- >> MySQL General Mailing List >> For list archives: http://lists.mysql.com/mysql >> To unsubscribe: >http://lists.mysql.com/mysql?unsub=andrema...@mineirinho.org >> > > >-- >MySQL General Mailing List >For list archives: http://lists.mysql.com/mysql >To unsubscribe:http://lists.mysql.com/mysql?unsub=je...@gii.co.jp -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Using RAND to get a unique ID that has not been used yet
>-Original Message- >From: Jim Lyons [mailto:jlyons4...@gmail.com] >Sent: Friday, May 28, 2010 11:49 AM >To: Andre Matos >Cc: mysql@lists.mysql.com >Subject: Re: Using RAND to get a unique ID that has not been used yet > >If your specs are that specific (IDs must be between 1 and 99) >then you could create a 99-row table with one integer column and >prefill it with the numbers 1 to 99 in random order. > >Then you could write a function that would select and return the first >number in the table, then delete that record so you would not reuse >it. > >Once you've done the work of sorting 99 numbers in random order >(which can be done anywhich way) it's easy and you don't have to loop >an indeterminant number of times. You would be looping an increasing >number of times as you begin to fill up the table. > [JS] You don't have to go to the trouble of sorting the "number" table in any order, random or anything else. Just select a random record from that table. Since you'll have the number of that record, you can delete it. Regards, Jerry Schwartz Global Information Incorporated 195 Farmington Ave. Farmington, CT 06032 860.674.8796 / FAX: 860.674.8341 www.the-infoshop.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Using RAND to get a unique ID that has not been used yet
It seems to be a good approach, although I was trying to get this by querying the table without creating another table to keep the Ids. Thanks, Andre -- Andre Matos andrema...@mineirinho.org On 2010-05-28, at 12:15 PM, Steven Staples wrote: > If you wanted to use/go that route, then why not select a random limit 1 > from that table, and then delete that row? > > SELECT `column` FROM `table` ORDER BY RAND() LIMIT 1; > > > On a side note, I would use the auto-inc field still, and store this number > in another field. > > Steven Staples > > > >> -Original Message- >> From: Jim Lyons [mailto:jlyons4...@gmail.com] >> Sent: May 28, 2010 11:49 AM >> To: Andre Matos >> Cc: mysql@lists.mysql.com >> Subject: Re: Using RAND to get a unique ID that has not been used yet >> >> If your specs are that specific (IDs must be between 1 and 99) >> then you could create a 99-row table with one integer column and >> prefill it with the numbers 1 to 99 in random order. >> >> Then you could write a function that would select and return the first >> number in the table, then delete that record so you would not reuse >> it. >> >> Once you've done the work of sorting 99 numbers in random order >> (which can be done anywhich way) it's easy and you don't have to loop >> an indeterminant number of times. You would be looping an increasing >> number of times as you begin to fill up the table. >> >> Jim >> >> On Fri, May 28, 2010 at 10:38 AM, Andre Matos >> wrote: >>> Hi All, >>> >>> I have a table that uses auto_increment to generate the Id automatically >> working fine. However, I need to create a new table where the Id must be a >> number generated randomly, so I cannot use the auto_increment. >>> >>> MySQL has a function RAND. So I could use something like this: >>> >>> SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable >>> >>> But, let's suppose that the RandId is a number that was already used in >> the table. Then I need to run the SELECT again and again until I find a >> number that hasn't been used. >>> >>> Is there a way to have this SELECT to loop until it finds a number that >> hasn't been used? >>> >>> The RandId must be only numbers and length of 6 (from 1 to 99). No >> other character is allowed. >>> >>> Thanks for any help! >>> >>> Andre >>> >>> -- >>> Andre Matos >>> andrema...@mineirinho.org >>> >>> >>> >>> >>> >>> -- >>> MySQL General Mailing List >>> For list archives: http://lists.mysql.com/mysql >>> To unsubscribe: >> http://lists.mysql.com/mysql?unsub=jlyons4...@gmail.com >>> >>> >> >> >> >> -- >> Jim Lyons >> Web developer / Database administrator >> http://www.weblyons.com >> >> -- >> MySQL General Mailing List >> For list archives: http://lists.mysql.com/mysql >> To unsubscribe:http://lists.mysql.com/mysql?unsub=sstap...@mnsi.net >> >> No virus found in this incoming message. >> Checked by AVG - www.avg.com >> Version: 9.0.819 / Virus Database: 271.1.1/2895 - Release Date: 05/28/10 >> 02:25:00 > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: > http://lists.mysql.com/mysql?unsub=andrema...@mineirinho.org > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Using RAND to get a unique ID that has not been used yet
If you wanted to use/go that route, then why not select a random limit 1 from that table, and then delete that row? SELECT `column` FROM `table` ORDER BY RAND() LIMIT 1; On a side note, I would use the auto-inc field still, and store this number in another field. Steven Staples > -Original Message- > From: Jim Lyons [mailto:jlyons4...@gmail.com] > Sent: May 28, 2010 11:49 AM > To: Andre Matos > Cc: mysql@lists.mysql.com > Subject: Re: Using RAND to get a unique ID that has not been used yet > > If your specs are that specific (IDs must be between 1 and 99) > then you could create a 99-row table with one integer column and > prefill it with the numbers 1 to 99 in random order. > > Then you could write a function that would select and return the first > number in the table, then delete that record so you would not reuse > it. > > Once you've done the work of sorting 99 numbers in random order > (which can be done anywhich way) it's easy and you don't have to loop > an indeterminant number of times. You would be looping an increasing > number of times as you begin to fill up the table. > > Jim > > On Fri, May 28, 2010 at 10:38 AM, Andre Matos > wrote: > > Hi All, > > > > I have a table that uses auto_increment to generate the Id automatically > working fine. However, I need to create a new table where the Id must be a > number generated randomly, so I cannot use the auto_increment. > > > > MySQL has a function RAND. So I could use something like this: > > > > SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable > > > > But, let's suppose that the RandId is a number that was already used in > the table. Then I need to run the SELECT again and again until I find a > number that hasn't been used. > > > > Is there a way to have this SELECT to loop until it finds a number that > hasn't been used? > > > > The RandId must be only numbers and length of 6 (from 1 to 99). No > other character is allowed. > > > > Thanks for any help! > > > > Andre > > > > -- > > Andre Matos > > andrema...@mineirinho.org > > > > > > > > > > > > -- > > MySQL General Mailing List > > For list archives: http://lists.mysql.com/mysql > > To unsubscribe: > http://lists.mysql.com/mysql?unsub=jlyons4...@gmail.com > > > > > > > > -- > Jim Lyons > Web developer / Database administrator > http://www.weblyons.com > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe:http://lists.mysql.com/mysql?unsub=sstap...@mnsi.net > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.819 / Virus Database: 271.1.1/2895 - Release Date: 05/28/10 > 02:25:00 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Using RAND to get a unique ID that has not been used yet
If your specs are that specific (IDs must be between 1 and 99) then you could create a 99-row table with one integer column and prefill it with the numbers 1 to 99 in random order. Then you could write a function that would select and return the first number in the table, then delete that record so you would not reuse it. Once you've done the work of sorting 99 numbers in random order (which can be done anywhich way) it's easy and you don't have to loop an indeterminant number of times. You would be looping an increasing number of times as you begin to fill up the table. Jim On Fri, May 28, 2010 at 10:38 AM, Andre Matos wrote: > Hi All, > > I have a table that uses auto_increment to generate the Id automatically > working fine. However, I need to create a new table where the Id must be a > number generated randomly, so I cannot use the auto_increment. > > MySQL has a function RAND. So I could use something like this: > > SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable > > But, let's suppose that the RandId is a number that was already used in the > table. Then I need to run the SELECT again and again until I find a number > that hasn't been used. > > Is there a way to have this SELECT to loop until it finds a number that > hasn't been used? > > The RandId must be only numbers and length of 6 (from 1 to 99). No other > character is allowed. > > Thanks for any help! > > Andre > > -- > Andre Matos > andrema...@mineirinho.org > > > > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/mysql?unsub=jlyons4...@gmail.com > > -- Jim Lyons Web developer / Database administrator http://www.weblyons.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Using RAND to get a unique ID that has not been used yet
Hi All, I have a table that uses auto_increment to generate the Id automatically working fine. However, I need to create a new table where the Id must be a number generated randomly, so I cannot use the auto_increment. MySQL has a function RAND. So I could use something like this: SELECT FLOOR(RAND() * COUNT(*)) AS RandId FROM mytable But, let's suppose that the RandId is a number that was already used in the table. Then I need to run the SELECT again and again until I find a number that hasn't been used. Is there a way to have this SELECT to loop until it finds a number that hasn't been used? The RandId must be only numbers and length of 6 (from 1 to 99). No other character is allowed. Thanks for any help! Andre -- Andre Matos andrema...@mineirinho.org -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Strange behavior by MySQL Stored Procedure
Hello Manasi, If possible can you please send in the code that you mentioned (procedure or trigger). Please give a detailed technical explanation explaining the query which you used from command line and the query used in the procedure. Please mention the table structure, show table status and few records from the query executed. Cheers, Anirudh Sundar 9594506474 DataVail Mumbai. On Fri, May 28, 2010 at 5:44 PM, Manasi Save < manasi.s...@artificialmachines.com> wrote: > Dear All, > > I have one stored procedure Which inserts data into one table. > > But sometimes it does not insert record. This happens when I called it from > java application. But If I called same query from mysql command line. It > executes successfully. > > Also I have one procedure which only retrieves data from table. and it only > gives one row sometime even if there are 10 rows available in for matching > condition. This too happen when I called it from Java application and if I > called it from mysql command line it gives me proper result set of 10 rows. > > I am not able to understand Is it something known for mysql? Or am I doing > something wrong? > > Any input will be a great help. > > -- > Thanks and Regards, > Manasi Save > >
Re: Strange behavior by MySQL Stored Procedure
2010/5/28 Manasi Save : [...] > Or am I doing something wrong? probably; you better send us another e-mail writing at least: - mysql version you are using - mysql Connector/J version you are using - piece of java code you are using to call the stored procedure - source of the stored procedure (or part of it) ... probably, a subset of all of these infos will not be enough to understand the problem. In any case, if you have troubles using the mysql jdbc driver but no problem using the mysql CLI and you suspect a Connector/J bug, maybe you better write to the "mysql java" support mailing list: http://lists.mysql.com/java Greetings, Mattia. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: mysqldump backup
I looking for a way to corrupt a mysql database forcefully for testing purpose and then the mysqldump utility will fail for taking backup against it. On Fri, May 28, 2010 at 8:06 AM, Anand.S wrote: > redirect your standard errors to some log file.. > > mysqldump --all-databases --flush-logs --master-data=2 > > /bk01/all_databases_`date +%a`.sql 2> /tmp/test.log > > i follow the above syntax for logging the errors in my script. > > Thanks > Anand > > On Fri, May 28, 2010 at 5:44 PM, Angelina Paul wrote: > >> Could you please inform me how to test the mysql databases backup failure >> by >> using the mysqldump utility. I written a unix script for sending status >> notification against ten mysql databases. I need to test the nine >> databases >> backups have completed successfully and one failed due some reason. >> >> Thanks for your help. >> > >
Tab Ahead Doesn't Work As User
Is it normal behavior for MySQL command type ahead not to work unless you have a database selected? I notice that using the tab 'type ahead' has no response unless I use a specific database. Is this normal behavior? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: mysqldump backup
redirect your standard errors to some log file.. mysqldump --all-databases --flush-logs --master-data=2 > /bk01/all_databases_`date +%a`.sql 2> /tmp/test.log i follow the above syntax for logging the errors in my script. Thanks Anand On Fri, May 28, 2010 at 5:44 PM, Angelina Paul wrote: > Could you please inform me how to test the mysql databases backup failure > by > using the mysqldump utility. I written a unix script for sending status > notification against ten mysql databases. I need to test the nine databases > backups have completed successfully and one failed due some reason. > > Thanks for your help. >
mysqldump backup
Could you please inform me how to test the mysql databases backup failure by using the mysqldump utility. I written a unix script for sending status notification against ten mysql databases. I need to test the nine databases backups have completed successfully and one failed due some reason. Thanks for your help.
Strange behavior by MySQL Stored Procedure
Dear All, I have one stored procedure Which inserts data into one table. But sometimes it does not insert record. This happens when I called it from java application. But If I called same query from mysql command line. It executes successfully. Also I have one procedure which only retrieves data from table. and it only gives one row sometime even if there are 10 rows available in for matching condition. This too happen when I called it from Java application and if I called it from mysql command line it gives me proper result set of 10 rows. I am not able to understand Is it something known for mysql? Or am I doing something wrong? Any input will be a great help. --Thanks and Regards, Manasi Save
