Re: I don't understand why SCSI is preferred.

2006-07-11 Thread Jon Frisby
It's my understanding that the biggest remaining difference has to do with SCSI having far superior command queueing capabilities -- although SATA's command queueing may have closed the gap somewhat -- which provides for much better real-world performance when you have multiple database thr

Re: I don't understand why SCSI is preferred.

2006-07-12 Thread Jon Frisby
This REALLY should be an academic concern. Either you have a system that can tolerate the failure of a drive, or you do not. The frequency of failure rates is pretty much irrelevant: You can train incredibly non-technical (inexpensive) people to respond to a pager and hot-swap a bad driv

Re: I don't understand why SCSI is preferred.

2006-07-12 Thread Jon Frisby
On Jul 12, 2006, at 12:45 PM, Scott Tanner wrote: I am hoping the newer SATA II drives will provide SCSI performance at a reasonable price. It would be interesting to see if anyone has polled ISP's to see what they're using. I know they charge more (or at least they used to) for SCSI d

Re: I don't understand why SCSI is preferred.

2006-07-12 Thread Jon Frisby
On Jul 12, 2006, at 12:56 PM, Daniel da Veiga wrote: On 7/12/06, mos <[EMAIL PROTECTED]> wrote: At 12:42 PM 7/12/2006, you wrote: >On Tuesday 11 July 2006 19:26, mos wrote: > > SCSI drives are also designed to run 24/7 whereas IDE drives are more > > likely to fail if used on a busy server.

Re: I don't understand why SCSI is preferred.

2006-07-12 Thread Jon Frisby
On Jul 12, 2006, at 12:58 PM, Chris White wrote: On Tuesday 11 July 2006 04:18 pm, Brian Dunning wrote: My understanding is that SCSI has a faster transfer rate, for transferring large files. A busy database needs really fast access, for making numerous fast calls all over the disk. Two differ

Re: I don't understand why SCSI is preferred.

2006-07-13 Thread Jon Frisby
We're using Opterons, Linux 2.6.x, and a SiL (Silicon Image) SATA chipset whose particular model number I don't have in front of me. After MUCH MUCH MUCH trial and error we've discovered that: 1) 2.6.16 substantially alleviates the problem but doesn't eliminate it. 2) There is a 3Ware card that

Re: I don't understand why SCSI is preferred.

2006-07-13 Thread Jon Frisby
On Jul 13, 2006, at 3:03 PM, mos wrote: At 03:45 PM 7/12/2006, Jon Frisby wrote: This REALLY should be an academic concern. Either you have a system that can tolerate the failure of a drive, or you do not. The frequency of failure rates is pretty much irrelevant: You can train incredibly

Re: I don't understand why SCSI is preferred.

2006-07-14 Thread Jon Frisby
It was my impression, from the information we've collected that our problem is very specific to Opteron. It's possible that your problem is actually unrelated. :( -JF On Jul 14, 2006, at 7:24 AM, living liquid|Christian Meisinger wrote: We're using Opterons, Linux 2.6.x, and a SiL (Silic

Non-linear degradation in bulk loads?

2005-10-10 Thread Jon Frisby
Everyone, We're trying to do some bulk data loads on several different tables (on several different machines, using several different techniques) and seeing dramatically worse-than-linear performance. We've tried the bulk-INSERT syntax, and the LOAD DATA INFILE syntax. We've done ALTER TABLE ...

RE: Non-linear degradation in bulk loads?

2005-10-10 Thread Jon Frisby
ginal Message- > From: Manoj [mailto:[EMAIL PROTECTED] > Sent: Monday, October 10, 2005 8:51 PM > To: Jon Frisby > Cc: mysql@lists.mysql.com > Subject: Re: Non-linear degradation in bulk loads? > > Not sure but given that you suffer from non-linear > degradation in performan

RE: Non-linear degradation in bulk loads?

2005-10-11 Thread Jon Frisby
> Two solutions: 1) sort the rows to be inserted on the key > 'email' before inserting. > > 2) Or: > > http://dev.mysql.com/doc/mysql/en/innodb-tuning.html > " > If you have UNIQUE constraints on secondary keys, starting from MySQL > 3.23.52 and 4.0.3, you can speed up table imports by > tempor

RE: Non-linear degradation in bulk loads?

2005-10-14 Thread Jon Frisby
STATUS\G > > when the inserts happen slowly. > > What is your my.cnf like? > > Regards, > > Heikki > Innobase/Oracle > > - Alkuperäinen viesti - > Lähettäjä: "Jon Frisby" <[EMAIL PROTECTED]> > Vastaanottaja: "Heikki Tuuri" &l

RE: Non-linear degradation in bulk loads?

2005-10-17 Thread Jon Frisby
on the box sits at around 6-7, with a large (>50%) > amount of time spent in wait state, but actual disk > throughput to our software RAID array (No longer on a SAN...) > is quite low -- 6-9k blocks/s out, 1-6k blocks/s in. > " > > Regards, > > Heikki > >

RE: Non-linear degradation in bulk loads?

2005-10-17 Thread Jon Frisby
l 1GB * > 3 log files. 8 I/O threads. > > Load on the box sits at around 6-7, with a large (>50%) > amount of time spent in wait state, but actual disk > throughput to our software RAID array (No longer on a SAN...) > is quite low -- 6-9k blocks/s out, 1-6k blocks/s in. >

RE: Non-linear degradation in bulk loads?

2005-10-17 Thread Jon Frisby
er pool, and our usual 1GB * > 3 log files. 8 I/O threads. > > Load on the box sits at around 6-7, with a large (>50%) > amount of time spent in wait state, but actual disk > throughput to our software RAID array (No longer on a SAN...) > is quite low -- 6-9k blocks/s ou

RE: Non-linear degradation in bulk loads?

2005-10-17 Thread Jon Frisby
r? > > Regards, > > Heikki > Oracle/Innobase > > - Alkuperäinen viesti - > Lähettäjä: "Jon Frisby" <[EMAIL PROTECTED]> > Vastaanottaja: "Heikki Tuuri" <[EMAIL PROTECTED]>; > > Lähetetty: Monday, October 17, 2005 8:46 PM &g

RE: Non-linear degradation in bulk loads?

2005-10-17 Thread Jon Frisby
dummy programs that occupy a few GB of memory. > > Regards, > > Heikki > Oracle/Innobase > > - Alkuperäinen viesti - > Lähettäjä: "Jon Frisby" <[EMAIL PROTECTED]> > Vastaanottaja: "Heikki Tuuri" <[EMAIL PROTECTED]>; > >

RE: Turning tables on their side

2005-10-19 Thread Jon Frisby
You want a Pivot Table. Excel will do this nicely (assuming you have 65536 rows or less), but SQL does not provide a mechanism to do this. If you want a web based interface you can look at Jtable. (I *think* that's what it's called -- it's a Java web app that provides an HTML pivot table interfac

RE: Turning tables on their side

2005-10-19 Thread Jon Frisby
Create an Excel spreadsheet. Import the raw data, structured as-is, into a worksheet. Select all the relevant columns. Go to Data -> "Pivot Table and Pivot Chart Report". Click "Finish". From the "PivotTable Field List", drag the respondant ID into the box labeled "Drop Row Fields Here", then

RE: Input on Materialized Views

2005-10-21 Thread Jon Frisby
> Better, mark this view (or particular rows if it's not too > expensive) as "dirty" and recompute it only on access, you > may spare few cycles... That sort of depends on what you're going for. Typically materialized views are used for summarizations of hypercubes for OLAP systems (data marts

Re: BINARY(N) as primary key?

2006-11-08 Thread Jon Frisby
I'm curious to know why simply having a UNIQUE constraint on the column is inadequate... -JF On Nov 7, 2006, at 6:47 PM, Michael Fischer wrote: Any thoughts on using BINARY(N) or CHAR(N) as a primary key? Performance issues? In mysql, in general? Yes, in the context of the application, th

Re: BINARY(N) as primary key?

2006-11-08 Thread Jon Frisby
l Fischer wrote: On Wed, Nov 08, Jon Frisby wrote: On Nov 7, 2006, at 6:47 PM, Michael Fischer wrote: Any thoughts on using BINARY(N) or CHAR(N) as a primary key? Performance issues? In mysql, in general? Yes, in the context of the application, there is a very good reason for doing th

RE: Switching to InnoDB turns out dissapointing

2005-03-01 Thread Jon Frisby
> > set-variable =innodb_log_buffer_size=32M > > The log buffer is too big. Is there a performance penalty associated with making the log buffer size too large, or is just not beneficial? -JF -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http:/

RE: Is mySQL right for me??

2003-12-09 Thread Jon Frisby
>From what you describe, I have to wonder if a database is even truly appropriate for the situation at all. How large is the data set in question? If it's very small, save for actual image data (which could be stored as files) the question becomes how often and under what circumstances the data w

RE: Zeos, MySQL problem

2003-12-15 Thread Jon Frisby
You can disable connection timeouts at the MySQL server level. You should check the docs to be sure, but I think the relevant variable is "wait_timeout" -- setting it to 0 should disable connection timeouts. -JF > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >

RE: DB Performance - Celeron vs. P4

2003-08-14 Thread Jon Frisby
Is the workload I/O bound, CPU bound, or memory bound? On Linux, you can get a sense of this as follows: Run "top" and "vmstat 5" on your MySQL box, and with them running have your system perform whatever slow operations you are concerned about. The key numbers here are the "swap used" "% iowai

RE: Production release of MySql 4.1

2004-06-30 Thread Jon Frisby
As I understand it, the particular cycle a release is in depends on how long it's been since a major bug was reported. So an alpha becomes a beta if nobody reports a major bug after N days, and a beta becomes a production release if goes N days without a major bug report. Thus, even if 4.1.3 is r

RE: Best table structure

2004-06-30 Thread Jon Frisby
The current approach is better. Having one row with 81 columns will be harder to deal with in terms of writing code to display it. The size of the table will be roughly the same either way -- either you have a few very big rows, or many small rows, but that shouldn't be a huge issue if you index

ANN: EasySQL 0.0.1

2004-07-26 Thread Jon Frisby
Sorry for the intrusion... EasySQL is a meta-language for MySQL that provides a more sophisticated environment for pure-SQL coding than MySQL provides on its own, eliminating the need for external languages such as Perl in many instances. The first version of EasySQL features iteration across r

Optimizer strangeness in 4.0.20.

2004-08-17 Thread Jon Frisby
The following behavior occurs in MySQL 4.0.20 with both InnoDB and MyISAM tables. It happens on the prmary-key index as well as other indexed columns. The behavior does NOT occur in 3.23.56 and 3.23.58. This is just setup... mysql> select @x := 1; mysql> explain SELECT @x := IF(MAX(id) > @x, MA

RE: MySQL with Intel Compiler

2004-08-24 Thread Jon Frisby
We've seen this problem too. In our case we definitely had a mysql user, and the mysql user definitely existed. From one prompt we could start the gcc-compiled MySQL correctly, but not the Intel-compiled MYSQL. We were able to fix the problem by setting LD_LIBRARY_PATH=/lib. -JF > -Origina

RE: Will series of limited selects return entire table?

2004-10-12 Thread Jon Frisby
If you include an ORDER BY clause, and the contents of the table are not modified, then yes. Unexpected insertion of a row in the "middle" of the table (as ordered by your ORDER BY clause) may cause a row to be seen twice (if it happens at an index below the point your queries have reached) as it

RE: Mysql Online Backup.

2003-08-27 Thread Jon Frisby
> > The advantage of other methods is that you avoid all sorts of nasty > > locking on various parts of your database. The advantage of > the Hot Copy > > product that Innobase Oy sell is that it doesn't place any > locks on your > > InnoDB table space when it runs. > > Wouldn't that break the A

RE: Questions abou innodb

2003-09-08 Thread Jon Frisby
> 1) can you join a MyISAM table to an innodb table in a select? Absolutely. > 2) Under 'Restrictions...' in the manual, it says: > When you restart the MySQL server, InnoDB may reuse an old > value for an > AUTO_INCREMENT column. > Under what circumstances does this occur? If you perform an I

RE: Questions abou innodb

2003-09-09 Thread Jon Frisby
SET AUTOCOMMIT=0; -- Disable automatic COMMITs after each statement. -- Tx #1. Do your work here. COMMIT; -- or ROLLBACK if there was an error. -- Tx #2. Do more work here. COMMIT; -- etc... Keep in mind that errors can result in either the offending statement being rolled back (leaving the rest

RE: Distributing a DB

2003-09-09 Thread Jon Frisby
By "partitioning", you mean having one table divided across N partitions? Such a feat isn't directly possible with MySQL, however you can create N tables instead of 1, and use a table of Type=RAID on the master to "unify" them for purposes of queries that need to access data from many partitions.

RE: Distributing a DB

2003-09-09 Thread Jon Frisby
> I've read about using symbolic links, but only for using > multiple data > directories, not splitting a file (not to mention, across > more than one node). Symlinks wont work for splitting a file... > Since MySQL doesn't directly support this, any ideas on doing > it at the OS > level t

RE: MySQL 4.1 Date Comparing

2003-09-09 Thread Jon Frisby
This should work, but will not use any index on date_field: SELECT field FROM table WHERE DATE_FORMAT(date_field, "%Y-%m-%d") = '2003-10-10'; This is better and will allow an index to be used if appropriate: SELECT field FROM table WHERE date_field >= "2003-10-10 00:00:00" AND date_field < DATE_A

RE: mysql dump speed

2003-09-11 Thread Jon Frisby
Use the --opt option when performing the dump. It can make a tremendous difference. -JF > -Original Message- > From: dan orlic [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 11, 2003 12:31 PM > To: [EMAIL PROTECTED] > Subject: mysql dump speed > > > I have a bit of an issue wit

RE: Does Null == ""?

2003-09-15 Thread Jon Frisby
> The application is payroll/personnel. A programmer is tasked with > creating forms for data entry on new employees, including > supervisor. > If the user doesn't enter a new employee's supervisor, the > application > accepts it, figuring that it is not yet known, and stores > NULL for the

RE: Does Null == ""?

2003-09-16 Thread Jon Frisby
> Even if I grant you that, the DB designer should have produced the > documentation. I'm willing to place the blame on both people; either > one could have avoided the problem. But, the DBD (data > administrator, > if you prefer) is more likely to have been *aware* of the > problem in the

RE: Re Does NULL == ""?

2003-09-16 Thread Jon Frisby
The performance benefit to be had with NOT NULL columns comes from the fact that a NOT NULL column can be of fixed length (allowing for fixed length records). Using NOT NULL probably wont offer any benefit on a VARCHAR column, since VARCHAR columns are not of fixed length to begin with. -JF > --

RE: Does Null == ""?

2003-09-16 Thread Jon Frisby
> I didn't know that. What *does* it do if you specify a > string literal that's smaller than the CHAR(20) field, then? > Pad it with binary zeros? MySQL returns a properly trimmed string, although it will allocate a fixed amount of space for the storage. Other databases pad with blank spaces

HDS SAN + DMP + MySQL = ?

2004-03-26 Thread Jon Frisby
Everyone, We're looking to get an HDS SAN solution (95xx series I believe) at my present employer, and our only remaining concern is the reliability of MySQL when used in conjunction with dynamic multipathing software (under Linux). We use 3.23.x mostly, some 4.0.x -- almost all our data is in Inn

RE: EJB - Entity Beans

2004-06-09 Thread Jon Frisby
Boyd, First off, I should note that I haven't actually used EJB since about 1.1 or so and have only been casually keeping up with some of the specs. Therefore, some of what I say may be a bit out of date. Please ingest large granules of salt while reading this. What you're referring to is actual

RE: Mysql Replication

2002-11-21 Thread Jon Frisby
read AND alter data then it must connect to the master. -JF > -Original Message- > From: Massimo Bandinelli [mailto:[EMAIL PROTECTED]] > Sent: Thursday, November 21, 2002 1:48 AM > To: Jon Frisby > Cc: [EMAIL PROTECTED] > Subject: R: Mysql Replication > > >

RE: CREATE TABLE and CHECK clausole

2002-12-03 Thread Jon Frisby
I've attempted to get the CHECK clause to work as well, and have had no luck. I don't think it's actually supported by MySQL yet. -JF > -Original Message- > From: R. Hannes Niedner [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, December 03, 2002 7:42 AM > To: Achille M. Luongo; MySQL Maili

RE: relational is relational is relational, but ...

2002-12-03 Thread Jon Frisby
What you're asking for is the ON CHANGE CASCADE behavior of FOREIGN KEYs, and I don't know if InnoDB supports this. However, from a DB design standpoint, it is generally considered MASSIVELY unwise for your PRIMARY KEY value to have any "business-meaning". If it has no "business-meaning", it neve

RE: RE: relational is relational is relational, but ...

2002-12-09 Thread Jon Frisby
> -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Monday, December 09, 2002 6:00 PM > To: Jon Frisby > Subject: Re: RE: relational is relational is relational, but ... > > > Your message cannot be posted because it appears to be

RE: Riddle Me This...

2002-12-26 Thread Jon Frisby
What you want is the FULL OUTER JOIN syntax which MySQL doesn't support. SELECT fruit_table.date, fruit, vegetable FROM fruit_table FULL OUTER JOIN vegetable_table ON (fruit_table.date = vegetable_table.date); (I'm assuming that NULL is acceptable instead of the empty string for the empty cells i

RE: InnoDB tables

2002-04-09 Thread Jon Frisby
FOREIGN KEYs by themselves make it faster and easier to validate that your code is correctly maintaining referrential integrity. They also let O/R mappers do more of the work in generating code for accessing your data (Blatant Plug: http://freshmeat.net/projects/easyorm/ -- EasyORM is an O/R mapp

RE: MySQL and stored procedures -> v4.1 :(

2002-04-12 Thread Jon Frisby
> Checked my own version and found it to be "Ver 11.16 Distrib 3.23.49". > > He, version 11??? Quit confused, but after a sanity check with reality > I realized I must be using version 3.23. Anyhow, check the status of > next version and found out that version 4.0 is in alpha mode... The "Ver 11.1

RE: MySQL and stored procedures -> v4.1 :(

2002-04-15 Thread Jon Frisby
> > I'll trust a MySQL alpha release before the final production releases of > > most vendors. In fact, we're using 4.0.1 in our production > environment with > > great success. > Its your system, and if you think it worth the risc, it is of course you > decision to do so to, ;) but I would never

RE: MySQL and stored procedures -> v4.1 :(

2002-04-15 Thread Jon Frisby
> But I did ask for a release date of version 4.1. When it's ready. > A nice thing with a stored procedure is that you can lower the load > impact made by heavy queries on the database by using cursors to soften > the performance hit they are likely to make - e.g. make the query behave > like a

RE: MySQL and stored procedures -> v4.1 :(

2002-04-15 Thread Jon Frisby
> > When it's ready. > > That's a tautological answer. You've already stated your lack of belief in the reliability of deadlines, so what did you expect? If someone had responded with "4.1 will be done on 5/1/2002" you'd respond that the only way that would happen would be if it were horribly bu

RE: WHERE codition test

2002-04-16 Thread Jon Frisby
String literals in a truth test such as you set up are coerced to integers. (A la C's 'atoi()' function.) The following returns all rows from a table: SELECT * FROM test WHERE '1'; // String becomes 1 SELECT * FROM test WHERE '1a'; // String becomes 1 SELECT * FROM tes

RE: WHERE codition test

2002-04-16 Thread Jon Frisby
> Neither I, it seams strange. This value has to be stored in some kind > of pointer to an object or char * in the program it self. I would first > assume that the content of the pointer is tested, but that cant be true > since the content in this case is the number 65. You're assuming a very low

RE: WHERE codition test

2002-04-16 Thread Jon Frisby
OTECTED]] > Sent: Tuesday, April 16, 2002 11:07 AM > To: Mysql List > Subject: RE: WHERE codition test > > > On 16 Apr 2002, at 10:58, Jon Frisby wrote: > > > String literals in a truth test such as you set up are coerced > to integers. > > (A la C's '

RE: Large Tables

2002-04-30 Thread Jon Frisby
It has been my (unfortunate) experience that OLAP type applications are not MySQL's strong point. Large dataset applications involving queries that perform aggregations, and scan most/all of the dataset tend to take a very very long time to execute on MySQL even when using a star-schema (although

RE: Good color coded SQL editor for MySQL?

2002-04-30 Thread Jon Frisby
I'm rather fond of GTE (GWD Text Editor) myself -- http://www.gwdsoft.com -JF > -Original Message- > From: Jerry [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, April 30, 2002 6:37 AM > To: MySQL General List > Subject: Good color coded SQL editor for MySQL? > > > Does anyone know of a goo

RE: Deleting from multiple tables

2002-05-23 Thread Jon Frisby
> [snip] > I am using MySQL with a PHP front end. Is there a better way to delete > from multiple tables than the following? > $result=mysql_query("DELETE FROM team WHERE team_id = '$team_id'"); > $result=mysql_query("DELETE FROM conflicts WHERE team_id = > '$team_id'"); > $resu

Not using indexes???

2002-06-07 Thread Jon Frisby
Please excuse me if this is something blindingly obvious, but having now encountered this in several circumstances, but I have been unable to find a resolution in the docs (perhaps I just missed it?). In actuality we encountered the problem when doing some nasty joins, but the problem seems reall

RE: Not using indexes???

2002-06-07 Thread Jon Frisby
> * Mysql, after reading the query, decides wether using an index would be > better than just a table row scan. Hence, it's MySql's decision MySQL is making the wrong decision. As stated below, it's doing a table scan when it only needs to look at some 2,800 rows out of 970,000 rows. In addit

RE: Not using indexes???

2002-06-10 Thread Jon Frisby
> E.g. the non-equivalence operator is the same. MySQL will use indexes > for "foo>0", but not "foo<>0", which ask for the same result (presumed > foo is an unsigned column). Perhaps I was a bit unclear... Using "foo > 0" does *NOT* use an index. Using "foo > 0 AND foo < somevalue" *DOES* use an

RE: MySQL AB: Need documentation clarification

2002-06-10 Thread Jon Frisby
> Indexes are only used if they significantly reduce the number of reads > required vs a full table scan (I believe 30% is mysql's threshhold). > An IS NOT NULL clause may very well use an index if almost all of the > records have NULL in that particular field. A != clause is a bit > harder, sinc

RE: Sub-selects

2002-06-20 Thread Jon Frisby
In MySQL 4.0.x: DELETE order_details FROM order_details LEFT OUTER JOIN order_header ON (order_details.order_number = order_header.order_number) WHERE order_header.order_number IS NULL; -JF > -Original Message- > From: Gurhan Ozen [mailto:[EMAIL PROTECTED]] > Sent: Thursday, June 20, 200

Nasty LIMIT/multi-table DELETE bug?

2002-06-21 Thread Jon Frisby
I just discovered a very scary behavior. We're using MySQL 4.0.1 on Linux, both tables are InnoDB, AUTO_COMMIT is on (default) and these queries are being issues from the MySQL interactive console. If I do a query of the form: SELECT transaction_report.*, confirmed FROM transaction_

RE: Rand slowness.

2002-06-27 Thread Jon Frisby
L List [mailto:[EMAIL PROTECTED]] > Sent: Thursday, June 27, 2002 2:44 PM > To: Jon Frisby > Cc: mysql > Subject: Re: Rand slowness. > > > I tried this, but it seems to be ignoring the LIMIT 3, since it > is returning > all the rows. > > > > Try: > >

RE: MySQL/InnoDB-4.0.2 is released

2002-07-12 Thread Jon Frisby
Does your my.cnf file contain any comments that begin after a configuration option? I had similar problems setting up 4.0.2, but stripping such comments fixed it. E.G.: set-variable = innodb_mirrored_log_groups=1 # Some comment here... MySQL 4.0.2 complains about the set-variable statement

MySQL 4.0.2 replication going bonkers?

2002-07-15 Thread Jon Frisby
We recently set up a 4.0.2 slave, which worked fine -- we loaded our data snapshot (taken via mysqldump) and were able to perform complex queries without problems... However, as soon as we tried to get this machine to act as a slave to a 4.0.1 server it crashed. Immediately upon executing "SLAVE

RE: MySQL 4.0.2 replication going bonkers?

2002-07-15 Thread Jon Frisby
This seems to have not gotten through... Perhaps the spam filter ate it? (sql, query) -JF > -Original Message- > From: Jon Frisby [mailto:[EMAIL PROTECTED]] > Sent: Monday, July 15, 2002 4:27 PM > To: [EMAIL PROTECTED] > Subject: MySQL 4.0.2 replication going bonkers? &g

RE: Primary and Foreign Keys in MySQL

2002-07-24 Thread Jon Frisby
I'm assuming you have AUTO_INCREMENT columns in each table? Try this: INSERT INTO TABLE1(...) VALUES(...); SELECT @t1id := LAST_INSERT_ID(); INSERT INTO TABLE1A(table1_id, ...) VALUES(@t1id, ); INSERT INTO TABLE1B(table1_id, ...) VALUES(@t1id, ); ... -JF > -Original Message- >

4.0.2 Replication problem w/ AUTO_INCREMENT columns?

2002-07-26 Thread Jon Frisby
Hello all, We're experiencing a bit of difficulty replicating from a 4.0.2 master on Linux to a 4.0.2 slave on Linux. Most of our tables, including the one that's giving us headaches are InnoDB. My colleague encountered the problem, his description follows: > It seems to barf on auto_increment

RE: max() null bug with funny column name

2002-07-26 Thread Jon Frisby
Have you tried "SELECT MAX(`timestamp`) FROM minutely_inbound_handovers;"? -JF > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Friday, July 26, 2002 6:48 AM > To: [EMAIL PROTECTED] > Subject: max() null bug with funny column name > > > >Description: > >

RE: Fw: Complex SQL assistance

2002-07-27 Thread Jon Frisby
> SQL does not exist in a vacuum. > You have to run a client. > The client is part of or runs under some scripting language ( perl , > php, sh, command.com ) > which in turn runs on an operating system. > You have to somehow pass values that you want to select, update, > or insert. > So it really

RE: Jon Frisby---MySQL help needed

2002-07-29 Thread Jon Frisby
> Whatever you have suggested so far hasn't worked. I thought that > maybe something > is missing in my stating the problem and implementing your > suggested solutions. > So here is a more expanded picture of the queries: > > $sth=$dbh->prepare("INSERT INTO TABLE1 (id,var1,var2) VALUES (?,?,?)");

RE: InnoDB Question

2002-09-05 Thread Jon Frisby
> This implies that I have to preguess how large each data file will be. Correct. However, all InnoDB tables will share this space automatically. (Corrolary: A single table will automatically span several InnoDB data files if need be.) > Now, I understand with MyISAM tables that they just "gr

Documentation correction...

2002-09-22 Thread Jon Frisby
Section 6.5.3 of the MySQL documentation has some slight mistakes: Under the "create_definition:" section, the following line appears: or CHECK (expr) But this syntax doesn't appear to actually be supported yet (it produces an error rather than being silently ignored). Under the "type:" s

RE: Documentation correction...

2002-09-23 Thread Jon Frisby
IGNED] [ZEROFILL] -JF > -Original Message- > From: Jon Frisby [mailto:[EMAIL PROTECTED]] > Sent: Sunday, September 22, 2002 1:12 PM > To: mysql > Subject: Documentation correction... > > > Section 6.5.3 of the MySQL documentation has some slight mistakes: > > Und

ANN: DataDiff 0.1.0.

2002-09-29 Thread Jon Frisby
Please accept my apologies for consuming bandwidth with such a blatant plug. I just released a utility that will compare the rows of corresponding tables in two MySQL databases and return any rows which differ. In addition, it can optionally ignore any DATE/TIME/DATETIME/TIMESTAMP columns in com

ANN: DataDiff 0.1.0.

2002-09-29 Thread Jon Frisby
Please accept my apologies for consuming bandwidth with such a blatant plug. I just released a utility that will compare the rows of corresponding tables in two MySQL databases and return any rows which differ. In addition, it can optionally ignore any DATE/TIME/DATETIME/TIMESTAMP columns in

RE: Rounding floats

2002-10-23 Thread Jon Frisby
Another alternative for storage of currency values is to use the DECIMAL type, which allows you to explicitly specify scale and precision. You're still constrained to a maximum precision that matches that of DOUBLE, and you get the inefficiency of storing values as strings but you don't have to wor

Vague error message...

2002-10-23 Thread Jon Frisby
A colleague asked me what was wrong with this query: mysql> select user.id, email, count(click.id) as c from user, click where when_signup >= '2002-11-10' and click.user_id = user.id group by c; ERROR 1056: Can't group on 'c' Of course, it's logically impossible to group by the result of an exp

RE: Multi-table delete is broken in MySQL 4.0.2

2002-11-01 Thread Jon Frisby
If you do: SELECT * FROM MyChannels, MyPackages; Then you should also get nothing because what you're asking the database to do is to perform a cartesian cross of the rows in both tables. Since there's no row in one of the tables, the cross will contain no rows. Ideally one could do: DELETE FR

RE: hierarchical Structure in Mysql

2002-11-06 Thread Jon Frisby
IIRC, "SQL For Smarties" has some excellent advice on how to handle tree structures in an SQL database efficiently, by treating nodes as sets ("set" in the mathematical sense). You can efficiently do queries along the lines of "get me everything in category X or any of it's sub(-sub)-categories."

Replication and temp tables...

2002-11-07 Thread Jon Frisby
Using 4.0.2 for both server and client, replicating the following query seems to have caused a crash on the client: CREATE TEMPORARY TABLE tmp1 ( day DATE NOT NULL, campaign_id INT NOT NULL, clicks INT, clicked FLOAT, approved FLOAT, users_raw INT, users_coreg INT,

RE: Replication and temp tables...

2002-11-08 Thread Jon Frisby
into that table that happen each day... -JF > -Original Message- > From: Heikki Tuuri [mailto:Heikki.Tuuri@;innodb.com] > Sent: Friday, November 08, 2002 12:22 AM > To: [EMAIL PROTECTED] > Subject: Re: Replication and temp tables... > > > Jon, > >

RE: simple query turned ugly

2002-11-14 Thread Jon Frisby
> SELECT papers.id, > concat(a1.first_name,' ',a1.middle_name,' ',a1.last_name) > as author1, > concat(a2.first_name,' ',a2.middle_name,' ',a2.last_name) > as author2, > concat(a3.first_name,' ',a3.middle_name,' ',a3.last_name) > as author3, > concat(a4.first_name,' ',a4.middle_name,' ',

RE: memory leak

2002-11-19 Thread Jon Frisby
Yeah, I've experienced the same thing -- if I leave my computer unattended it just saps memory until I start getting complaints from Windows about VM usage. Same deal -- W2K with all the updates. -JF > -Original Message- > From: Jon Finanger [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, N