[PHP-DB] gzip image files
I create a png dynamically - store the path in mysql.
And want to be able to offer the user a zipped version to download
Unfortunately haven't been able to get it to work up until now !
I'm sure it's something obvious but...
Open the png
$data = fopen('kunden/'.$name.'.png', rb);
encode it
$gzdata = gzencode($data);
where to write
$fp = fopen('kunden/zip/'.$name.'.gz', w);
write it
fwrite($fp, $gzdata);
fclose($fp);
what happens is the name gets included in the gz but written to it is only
kunden/example.png
Can anyone help ??
thanks in advance
regards
keith
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[PHP-DB] Newbie help with cookies/sessions
I'm new to the PHP and Mysql world and I hope I have an problem that can be answered quickly. It seems simple but who knows. Whenever I try to use cookies or start a session I get the following error: Warning: open(/Temp\sess_ba759cb3d78fadb70745ca480f1d8661, O_RDWR) failed: m (2) in Unknown on line 0 Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/Temp) in Unknown on line 0 I tried checking the session.save_path setting the php.ini but I'm not sure if this has to saved to a specific directory or just a valid directory. Any help would be greatly appreciated. Thank you. Kevin -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] gzip image files
Yes, it is.
the return value of fopen is a resource of type file.
var_dump($data); will show that
if you want to read the data use : fread($data,$buf);
but I think its better with file() function. The example from the docs show a better
method:
?php
$data = implode(, bigfile.txt);
$gzdata = gzencode($data, 9);
$fp = fopen(bigfile.txt.gz, w);
fwrite($fp, $gzdata);
fclose($fp);
?
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 4:23 PM
Subject: [PHP-DB] gzip image files
I create a png dynamically - store the path in mysql.
And want to be able to offer the user a zipped version to download
Unfortunately haven't been able to get it to work up until now !
I'm sure it's something obvious but...
Open the png
$data = fopen('kunden/'.$name.'.png', rb);
encode it
$gzdata = gzencode($data);
where to write
$fp = fopen('kunden/zip/'.$name.'.gz', w);
write it
fwrite($fp, $gzdata);
fclose($fp);
what happens is the name gets included in the gz but written to it is only
kunden/example.png
Can anyone help ??
thanks in advance
regards
keith
--
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For additional commands, e-mail: [EMAIL PROTECTED]
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Re: [PHP-DB] gzip image files
and if i use
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
$gzdata = gzencode($data);
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
it writes in the gz file this
Resource id #3
Yes, it is.
the return value of fopen is a resource of type file.
var_dump($data); will show that
if you want to read the data use : fread($data,$buf);
but I think its better with file() function. The example from the docs
show a better method:
?php
$data = implode(, bigfile.txt);
$gzdata = gzencode($data, 9);
$fp = fopen(bigfile.txt.gz, w);
fwrite($fp, $gzdata);
fclose($fp);
?
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 4:23 PM
Subject: [PHP-DB] gzip image files
I create a png dynamically - store the path in mysql.
And want to be able to offer the user a zipped version to download
Unfortunately haven't been able to get it to work up until now !
I'm sure it's something obvious but...
Open the png
$data = fopen('kunden/'.$name.'.png', rb);
encode it
$gzdata = gzencode($data);
where to write
$fp = fopen('kunden/zip/'.$name.'.gz', w);
write it
fwrite($fp, $gzdata);
fclose($fp);
what happens is the name gets included in the gz but written to it is
only
kunden/example.png
Can anyone help ??
thanks in advance
regards
keith
--
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail: [EMAIL PROTECTED]
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[PHP-DB] What software do I need in order to access Oracle database on an NT server from my unix machine?
Hello. I have a unix box which doesn't have anything related to Oracle installed on it. Now I have another remote machine: NT w/ Oracle Server 8. What software/Libraries do i need to install on my linux box in order to access Oracle database on that NT machine? Thanks. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] gzip image files
Of course it will
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
// ok so far so good
$gzdata = gzencode($data);
// here is the error, instead of $data use $contents
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
// this is ok
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: Andrey Hristov [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 5:06 PM
Subject: Re: [PHP-DB] gzip image files
and if i use
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
$gzdata = gzencode($data);
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
it writes in the gz file this
Resource id #3
Yes, it is.
the return value of fopen is a resource of type file.
var_dump($data); will show that
if you want to read the data use : fread($data,$buf);
but I think its better with file() function. The example from the docs
show a better method:
?php
$data = implode(, bigfile.txt);
$gzdata = gzencode($data, 9);
$fp = fopen(bigfile.txt.gz, w);
fwrite($fp, $gzdata);
fclose($fp);
?
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 4:23 PM
Subject: [PHP-DB] gzip image files
I create a png dynamically - store the path in mysql.
And want to be able to offer the user a zipped version to download
Unfortunately haven't been able to get it to work up until now !
I'm sure it's something obvious but...
Open the png
$data = fopen('kunden/'.$name.'.png', rb);
encode it
$gzdata = gzencode($data);
where to write
$fp = fopen('kunden/zip/'.$name.'.gz', w);
write it
fwrite($fp, $gzdata);
fclose($fp);
what happens is the name gets included in the gz but written to it is
only
kunden/example.png
Can anyone help ??
thanks in advance
regards
keith
--
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail: [EMAIL PROTECTED]
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To contact the list administrators, e-mail: [EMAIL PROTECTED]
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Re: [PHP-DB] gzip image files
ha it works !
thanks !
now just one last question :-))
how can i name my png in the gz file so that it ends with .png ?
i thought this would work
fwrite($fp, $gzdata.'.png');
but it doesn't ! :-(
Of course it will
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
// ok so far so good
$gzdata = gzencode($data);
// here is the error, instead of $data use $contents
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
// this is ok
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: Andrey Hristov [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 5:06 PM
Subject: Re: [PHP-DB] gzip image files
and if i use
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
$gzdata = gzencode($data);
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
it writes in the gz file this
Resource id #3
Yes, it is.
the return value of fopen is a resource of type file.
var_dump($data); will show that
if you want to read the data use : fread($data,$buf);
but I think its better with file() function. The example from the docs
show a better method:
?php
$data = implode(, bigfile.txt);
$gzdata = gzencode($data, 9);
$fp = fopen(bigfile.txt.gz, w);
fwrite($fp, $gzdata);
fclose($fp);
?
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 4:23 PM
Subject: [PHP-DB] gzip image files
I create a png dynamically - store the path in mysql.
And want to be able to offer the user a zipped version to download
Unfortunately haven't been able to get it to work up until now !
I'm sure it's something obvious but...
Open the png
$data = fopen('kunden/'.$name.'.png', rb);
encode it
$gzdata = gzencode($data);
where to write
$fp = fopen('kunden/zip/'.$name.'.gz', w);
write it
fwrite($fp, $gzdata);
fclose($fp);
what happens is the name gets included in the gz but written to it
is
only
kunden/example.png
Can anyone help ??
thanks in advance
regards
keith
--
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail:
[EMAIL PROTECTED]
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[PHP-DB] [PHP] Coding methods (was RE: [PHP-DB] gzip image files)
When you use the parser scans the string for variables. When ' is used it is not parsed. So you know what $variable to put, concatenate the strings with the variable(s). I think it's a faster method. IMO, yes it seems ugly, but I want to be faster not so readable as a novel. Regards, Andrey Hristov - Original Message - From: Boget, Chris [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Tuesday, November 27, 2001 5:28 PM Subject: [PHP] Coding methods (was RE: [PHP-DB] gzip image files) $filename = 'kunden/'.$name.'.png'; I see this all the time and I'm curious: what takes more computing power (granted, either would be incredibly little I'm sure, just curious which requires more work by PHP)? this: $filename = this . $varname . that; or this: $filename = this $varname that; I would think the latter example but am not sure. Another question, but this is more about personal style: I almost always use the latter method in my coding practices. It looks cleaner and, IMO, is easier to follow especially when there are a number of variables involved. For those that use the former method, why do you? I'm not trying to be judgemental, just curious why people do what they do. In asking, I may actually learn some- thing. :p Chris -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Coding methods (was RE: [PHP-DB] gzip image files)
I use the former method when concatenating say a complex SQL query thru a loop or loops, and me being the person I am like to keep things standard and consistant so I use the same method when I wish to concatenate simpler strings. Russ On Tue, 27 Nov 2001 09:28:37 -0600 Boget, Chris [EMAIL PROTECTED] wrote: $filename = 'kunden/'.$name.'.png'; I see this all the time and I'm curious: what takes more computing power (granted, either would be incredibly little I'm sure, just curious which requires more work by PHP)? this: $filename = this . $varname . that; or this: $filename = this $varname that; I would think the latter example but am not sure. Another question, but this is more about personal style: I almost always use the latter method in my coding practices. It looks cleaner and, IMO, is easier to follow especially when there are a number of variables involved. For those that use the former method, why do you? I'm not trying to be judgemental, just curious why people do what they do. In asking, I may actually learn some- thing. :p Chris #---# Believe nothing - consider everything Russ Michell Anglia Polytechnic University Webteam Room 1C 'The Eastings' East Road, Cambridge e: [EMAIL PROTECTED] w: www.apu.ac.uk/webteam www.theruss.com #---# -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] PHP accessing MySQL
OK, I have found some more time to work on my PHP project. The problem is indicated in the following line: $tables = mysql_list_tables($db_names[$db_num]) or die(Couldn't list databases.); I took the variable $db_num and replaced it with a value of 1 as follows: $tables = mysql_list_tables($db_names[1]) or die(Couldn't list databases.); The output gave me the following results: The value of db_list is: mysql test twignud The value of dbs is: Resource id #2 The value of db_num is: 3 If I replace $db_num with a value of 0, 2 or 3 I get Couldn't list databases. Any ideas anyone? Julie? Miles? Could this have anything to do with mysql user permission? Thanks, jkd Jonathan Duncan [EMAIL PROTECTED] wrote in message 9eekpb$s41$[EMAIL PROTECTED]">news:9eekpb$s41$[EMAIL PROTECTED]... YES!! I just had a feeling the book was wrong. That did get rid of the error. However, it did not completely solve my issue. Now when I run the script I just get the message Couldn't list databases. This just happens to be the die message for the same line of code that I have been looking at: $tables = mysql_list_tables($db_names[$db_num]) or die(Couldn't list databases.); It is almost as if it is not being able to even list the tables from the databases. I am working right now on just listing the tables of a database to see what happens. Thank you, jkd Julie Meloni [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... I believe you want to look at this page: http://www.thickbook.com/books/phpfe_errata.phtml -- ++ | Julie Meloni ([EMAIL PROTECTED]) | || | PHP Essentials and PHP Fast Easy | | http://www.thickbook.com | ++ -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] gzip image files
This writes 'png' at the end of file so the file will be corrupted for every
compressor. If you want to name is foo.bar.gz.png
then:
$fp = fopen('kunden/zip/'.substr($name,0,-4).'.gz'.'.png', w+);
not sure but the substr() have to remove .png from the filename.
Regards,
Andrey
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: Andrey Hristov [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 5:30 PM
Subject: Re: [PHP-DB] gzip image files
ha it works !
thanks !
now just one last question :-))
how can i name my png in the gz file so that it ends with .png ?
i thought this would work
fwrite($fp, $gzdata.'.png');
but it doesn't ! :-(
Of course it will
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
// ok so far so good
$gzdata = gzencode($data);
// here is the error, instead of $data use $contents
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
// this is ok
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: Andrey Hristov [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 5:06 PM
Subject: Re: [PHP-DB] gzip image files
and if i use
$filename = 'kunden/'.$name.'.png';
$data = fopen($filename, r);
$contents = fread($data, filesize($filename));
fclose($data);
$gzdata = gzencode($data);
$fp = fopen('kunden/zip/'.$name.'.gz', w);
fwrite($fp, $gzdata);
fclose($fp);
it writes in the gz file this
Resource id #3
Yes, it is.
the return value of fopen is a resource of type file.
var_dump($data); will show that
if you want to read the data use : fread($data,$buf);
but I think its better with file() function. The example from the docs
show a better method:
?php
$data = implode(, bigfile.txt);
$gzdata = gzencode($data, 9);
$fp = fopen(bigfile.txt.gz, w);
fwrite($fp, $gzdata);
fclose($fp);
?
Regards,
Andrey Hristov
IcyGEN Corporation
http://www.icygen.com
BALANCED SOLUTIONS
- Original Message -
From: Keith Whyman [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 4:23 PM
Subject: [PHP-DB] gzip image files
I create a png dynamically - store the path in mysql.
And want to be able to offer the user a zipped version to download
Unfortunately haven't been able to get it to work up until now !
I'm sure it's something obvious but...
Open the png
$data = fopen('kunden/'.$name.'.png', rb);
encode it
$gzdata = gzencode($data);
where to write
$fp = fopen('kunden/zip/'.$name.'.gz', w);
write it
fwrite($fp, $gzdata);
fclose($fp);
what happens is the name gets included in the gz but written to it
is
only
kunden/example.png
Can anyone help ??
thanks in advance
regards
keith
--
PHP Database Mailing List (http://www.php.net/)
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
To contact the list administrators, e-mail:
[EMAIL PROTECTED]
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Re: [PHP-DB] Problem with SQL query on several tables
Thanks, but I want wo JOIN data from three tables and then to order all data by datestamp. Can I Do It ? Thanks, Rosen Andrey Hristov wrote in message 071401c17759$f5873c80$0b01a8c0@ANDreY... Mysql says that in the join there are some columns with namer datestamp so you have to choose by which you want to order. Think about making LEFT JOIN. select * from f1 LEFT JOIN f2 ON f1.some_field=f2.some_field LEFT JOIN f3 ON f2.some_field=f3.some_field roder by f1.datestamp; Regards, Andrey Hristov IcyGEN Corporation http://www.icygen.com BALANCED SOLUTIONS - Original Message - From: Rosen [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, November 27, 2001 5:34 PM Subject: [PHP-DB] Problem with SQL query on several tables Hi, I'm trying to execute SQL query: select * from f1,f2,f3 order by datestamp MySQL returns me an error: 1052 - Column: 'datestamp' in order clause is ambigious The tables f1,f2,f3 have some structure. The field datestamp is type datetime. Why I can't order query on 'datestamp' ? Thanks, Rosen -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] Re: What software do I need in order to access Oracle database on an NT server from my unix machine?
AFAIK, you need to install the oracle 8 client for linux onto your machine. Unfortunately, it can't be downloaded alone. you need the entire Oracle 8 database release for Linux, available at www.oracle.com Hope I'm not wrong. Please correct me there's an error Regards, Philippe Lallous [EMAIL PROTECTED] a écrit dans le message news: [EMAIL PROTECTED] Hello. I have a unix box which doesn't have anything related to Oracle installed on it. Now I have another remote machine: NT w/ Oracle Server 8. What software/Libraries do i need to install on my linux box in order to access Oracle database on that NT machine? Thanks. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] Re: Table Locking...
Hi Ashley, Insert records into a table with a primary key that you define, not an autoincrement field. When 2 people try to insert a record with the same primary key, one will fail, the other will succeed. The one that fails will poll the database until the other record successfully completes the insert. Regards, John Ashley M. Kirchner [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... (PHP-DB folks, ignore this top question - unless you want to answer) Which type of DB/Table provides table locking while a process is altering data? I don't care for locking while using SELECTs, but I do need locking when something's being INSERTed or UPDATEd, so I won't get two processes trying to do the same darned thing at the same time. (MySQL folks, ignore this bottom question - unless you want to answer) I'm somewhat lost on how to do the following: I'm trying to go through a table and check for a particular information. If it doesn't exist, then go ahead and issue an INSERT with the relevant data. The next time another process comes along, it'll obviously find the information and issue an UPDATE instead. But, what happens if I get two processes running at the same time, trying to find information that does not exist yet? If both issue a SELECT and find the information not there, both will try to issue an INSERT, where really I want one of those processes to wait for the first one to finish doing whatever it needs to do, prior to continuing. (all of this is being done in PHP by the way). Does anyone have any suggestions for this scenario (or am I just blowing smoke out my arse and there's something else, internally, that I'm not aware of?) When (and how) to issue some sort of wait state for one process while the other's finishing what it needs to do, then restart the second process (which should re-check for existing information, and not blindly issue another INSERT right after the first one). -- W | I haven't lost my mind; it's backed up on tape somewhere. + Ashley M. Kirchner mailto:[EMAIL PROTECTED] . 303.442.6410 x130 IT Director / SysAdmin / WebSmith . 800.441.3873 x130 Photo Craft Laboratories, Inc.. 3550 Arapahoe Ave. #6 http://www.pcraft.com . . .. Boulder, CO 80303, U.S.A. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] oracle connection drop hangs app
Hi,
While writing an app that regularly checks an oracle database for new
entries I run into problems when the database server suddenly goes
offline (the network connection can't be trusted).
The call right after such a connection loss just hangs the application.
Here is a little example to illustrate ...
?
ob_implicit_flush();
$cnn = OCILogon( 'scot', 'tiger' );
function valid_cnn( $cnn ) {
return ( trim( OCIServerVersion($cnn) ) != '' );
}
while( true ) {
print valid_cnn( $cnn ) ? OK\n : DOWN\n;
sleep(1);
}
?
Running it results in a nice collection of OK's and a hangup when I
disconnect the network. Plugging the network back in resumes the series
of OK's after a while ... But the desired behaviour ( DOWN ) won't
appear.
Did anyone of you encountered a similar situation ? How did you solve
this ? ... Any ideas are good, since I'm a bit stuck and any lead might
help to a probably very simple solution (that I just can see rigth now)
Thanks in advance,
Christophe VG
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[PHP-DB] Re: ?? If Table Exists, Drop Table, then Create Table ??
In article [EMAIL PROTECTED], [EMAIL PROTECTED] SNIP Is there anything like the first line from mySQL? I need to check if a table exists and drop it if it does so it can be recreated. I do not have access to any admin facilities on my host so I need to be able to do this in a script I can modify. Found it... 'In MySQL Version 3.22 or later, you can use the keywords IF EXISTS to prevent an error from occurring for tables that don't exist.' DROP TABLE [IF EXISTS] tbl_name [, tbl_name,...] [RESTRICT | CASCADE] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Problem with SQL query on several tables
It sounds to me like what you're trying to do is APPEND data from three similarly structured tables into one entity ordered by a column common to all 3 tables called datestamp. If I'm mistaken, then please ignore all of the following: Approach #1 (mysql) Create a temporary table with the columns you need to process, indexed by datestamp, and append the data from the 3 tables-- then query the temp table. Approach #2 (php) Create an associative array (hash table) in php then append the data from the 3 tables, order as desired, and process. Which you choose would depend on which you find simpler-- the mysql approach would probably take a more time, but be easier to reuse on successive pages. ib Rosen wrote: Thanks, but I want wo JOIN data from three tables and then to order all data by datestamp. Can I Do It ? Thanks, Rosen Andrey Hristov wrote in message 071401c17759$f5873c80$0b01a8c0@ANDreY... Mysql says that in the join there are some columns with namer datestamp so you have to choose by which you want to order. Think about making LEFT JOIN. select * from f1 LEFT JOIN f2 ON f1.some_field=f2.some_field LEFT JOIN f3 ON f2.some_field=f3.some_field roder by f1.datestamp; Regards, Andrey Hristov IcyGEN Corporation http://www.icygen.com BALANCED SOLUTIONS - Original Message - From: Rosen [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, November 27, 2001 5:34 PM Subject: [PHP-DB] Problem with SQL query on several tables Hi, I'm trying to execute SQL query: select * from f1,f2,f3 order by datestamp MySQL returns me an error: 1052 - Column: 'datestamp' in order clause is ambigious The tables f1,f2,f3 have some structure. The field datestamp is type datetime. Why I can't order query on 'datestamp' ? Thanks, Rosen -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Oracle, PHP4, BSD
le jeu 08-11-2001 à 23:52, D. Witten a écrit : These are pretty basic questions, but I would appreciate help: I need to access Oracle (already running on a separate server) via PHP4 from a FreeBSD Server. 1) Can this be done? (if so...) I don't think so. But if the BSD can run linux prog, then you may try to install oracle (client part) on your server via the oracle java installer : OUI. It come with oracle. 2) Where do I find instructions? technet.oracle.com product : 8i, some howto exists. 3) Where do I get php_oci8 with php 4) Do I HAVE to install code from Oracle (the Oracle client, etc) on my server? (if so,,,) see 1) 5) Where do I get that client software? Thanks Dave Witten -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP-DB] Oracle, PHP4, BSD
Dave, This is easily accomplished via ODBC. Check out the PHP ODBC HOWTO's at www.iodbc.org, and let me know if you have further questions. Best regards, Andrew Hill Director of Technology Evangelism OpenLink Software http://www.openlinksw.com Universal Data Access Data Integration Technology Providers -Original Message- From: B. PERRINE [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 27, 2001 2:20 PM To: [EMAIL PROTECTED] Subject: Re: [PHP-DB] Oracle, PHP4, BSD le jeu 08-11-2001 à 23:52, D. Witten a écrit : These are pretty basic questions, but I would appreciate help: I need to access Oracle (already running on a separate server) via PHP4 from a FreeBSD Server. 1) Can this be done? (if so...) I don't think so. But if the BSD can run linux prog, then you may try to install oracle (client part) on your server via the oracle java installer : OUI. It come with oracle. 2) Where do I find instructions? technet.oracle.com product : 8i, some howto exists. 3) Where do I get php_oci8 with php 4) Do I HAVE to install code from Oracle (the Oracle client, etc) on my server? (if so,,,) see 1) 5) Where do I get that client software? Thanks Dave Witten -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Re: What software do I need in order to access Oracledatabase on an NT server from my unix machine?
le mar 27-11-2001 à 17:19, Philippe Saladin a écrit : AFAIK, you need to install the oracle 8 client for linux onto your machine. Unfortunately, it can't be downloaded alone. you need the entire Oracle 8 database release for Linux, available at www.oracle.com Hope I'm not wrong. Please correct me there's an error Regards, Philippe I confirm. B. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Problem with Oracle connection
le ven 23-11-2001 à 02:18, Jonathan B. Bayer a écrit : -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hello php-db, We have a RedHat 7.1 server with a stock install. I recompiled PHP from the source RPM in order to add oracle support. It mostly works, but we are having a problem where it apparently randomly loses the connection to the database. It is an oracle database which is on the local network; another system (a Sun) doesn't have this problem, so that rules out the database. Does anybody have any experience with this happening? Thanks in advance. JBB I guess you are using php-4.0.6, I met this problem on a Debian with this PHP version. B. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP-DB] Problem with SQL query on several tables
Thanks, but I want wo JOIN data from three tables and then to order all data by datestamp. There must be more than one column called datestamp, this is why mysql is telling you it's ambiguous. So you need to tell it which table's datestamp column you wish to use. for example your new query could be: select * from f1,f2,f3 order by f1.datestamp Also, presumably all the tables have a column which relates to one of the other columns in some way? If so, and I can't reason the point in doing it if there is not, maybe you should look at the JOIN syntax from the mysql manual. If nothing else it will give you a better understanding of joining tables and the problems you may face. M: Can I Do It ? Thanks, Rosen Andrey Hristov wrote in message 071401c17759$f5873c80$0b01a8c0@ANDreY... Mysql says that in the join there are some columns with namer datestamp so you have to choose by which you want to order. Think about making LEFT JOIN. select * from f1 LEFT JOIN f2 ON f1.some_field=f2.some_field LEFT JOIN f3 ON f2.some_field=f3.some_field roder by f1.datestamp; Regards, Andrey Hristov IcyGEN Corporation http://www.icygen.com BALANCED SOLUTIONS - Original Message - From: Rosen [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Tuesday, November 27, 2001 5:34 PM Subject: [PHP-DB] Problem with SQL query on several tables Hi, I'm trying to execute SQL query: select * from f1,f2,f3 order by datestamp MySQL returns me an error: 1052 - Column: 'datestamp' in order clause is ambigious The tables f1,f2,f3 have some structure. The field datestamp is type datetime. Why I can't order query on 'datestamp' ? Thanks, Rosen -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] Oracle 8i and PHP 4.
Is it possible to have nested transactions in PHP and Oracle 8i by using Oci8 dll ? Thanx, Daniel
Re: [PHP-DB] Storing JPEG's in MySQL -- Is it possible?
Please show your script, so that we can answer you better. CK Raju On Tuesday 27 November 2001 16:37, PaulC wrote: Hi, I've wrote a bit of code to upload a file, and store it in a MySQL longblob field. If I upload a GIF, and store it in MySQL I am able to retrieve it fine using a PHP script. However, a JPEG uploads, but cannot be retrieved successfully. (I get a broken image symbol in IE) Does anybody know why this is??? Thanks, Paul -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] Configure with Postgres/MySQL of different machine
The different machine has nothing to do with the config, and everything to do with the connect. It is in the connect string that you specify which machine for PHP to connect to Postgres. Joe Nelson wrote: I'm trying to configure php so that it will have support for both MySQL and Postgres. Normally that would not be a problem, however, both MySQL and Postgres will be on a different machine. How can I configure PHP to use the servers on the other machine? Everything I've seen shows how to do it when it's all on one machine. This is what I ran: ./configure \ --enable-track-vars \ --with-gd \ --with-mysql \ --with-pgsql \ --with-apxs=/usr/sbin/apxs --with-config-file-path=/etc Any help or pointers would be appreciated. Thanks. Joe -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] query to check valid emails
what's the LIKE query to see if an email address is valid?
For example, in PHP it's something like
if
(eregi(^[0-9a-z]([-_.]?[0-9a-z])*@[0-9a-z]([-.]?[0-9a-z])*\\.[a-z]{2,3}$,$
email,$check)) {
echo valid;
}
i want to sort through rows in a db and look for invalid email addresses
so like, select * from tbl where email like ???
Thanks!
- Noah
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Re: [PHP-DB] Re: [PEAR-DEV] Re: Common DB Abstraction Layer: Re: [PEAR-DEV]Adoption of Metabase
Stig S. Bakken wrote: Joao Prado Maia wrote: On Wed, 21 Nov 2001, Martin Jansen wrote: On Wed, 21 Nov 2001 09:19:44 -0500 (EST), Joao Prado Maia wrote: If PEAR::DB is not abstracting the database what is the purpose of such a library ? To ease the life of lot's of programmers. I probably used a bad choice of words. What I really meant was: What is the objective of PEAR::DB as a database abstraction library ? To abstract as much as possible like Metabase already does, or to provide a unified API to databases and leave the implementation related to database specific to the user himself ? It's okay to choose the latter, but I believe we should have a unique position on something like this, so we know what we are working for. A statement like this will be very helpful when people come to the mailing list saying that PEAR::DB doesn't abstract LOB's or any other exotic feature, as we can just reply that's not our objective. Anyway, I think this is a good discussion. PEAR DB's objective was to provide a common API. This is why I did not choose Metabase for PEAR in the first place, IMHO it was too huge and After almost two years PEAR-DB is still catching up with Metabase features, for instance, sequences, limits in select queries, etc... When PEAR-DB catches up on the current Metabase features it will not be smaller than Metabase. The difference is that it will take even a longer while to catch up than it already took today. What is worse is that it is under-documented and subject of permanent API changes. Take for instance, the recent changes on the way to specify limits to select queries. First, they decide that setting the query limits should be coupled actual query execution. Then they realize that setting the limits of prepared queries have to be done before executing the query. So, the latest solution is doing exactly as it is done with Metabase! If this already like this with limits in select queries, I can imagine how it will be like when somebody finally decides that PEAR-DB needs an interface for handling BLOBs. I guess it will be something like everybody jumping in with their own ideais on how to store and retrieve data from BLOBs, leading to several incompatible versions of the API functions to do that. You have to admit that this is silly. The real problem is that this experimental character of PEAR-DB is annoying to most users because they do not have a stable API to rely on, nor do they have an expectation on when PEAR-DB API will ever be stable and properly documented. So for a lot of people, PEAR-DB is as good as non-existing. My proposal to wrap PEAR-DB around Metabase is exactly to address this current PEAR-DB deficiencies and stop the PHP bad fame of lacking of a database abstraction layer. Metabase API is stable and througly documented. Metabase manual not only documents the features and the functions, but also has a pedagogical approach because it explains clearly with some detail complex concepts like prepared queries, transctions, blobs, etc... Regards, Manuel Lemos -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP-DB] inserting mysql data using php array???
meaning
INSERT INTO table (first_name,middle_name,last_name,suffix)
VALUES($an_array)
no. that is not possible.
you do actually have to write it out..
INSERT INTO table (first_name,middle_name,last_name,suffix)
VALUES('$name[0]', '$name[1]', '$name[2]', $name[3])
I dont understand why you have these in arrays if they are only simple text
inputs. it'd be much easier to understand your code visually if you had the
name of each field actually descriptive of the content in it. It is also
not valid html to have [ ]'s in the name parameter, I believe.
- Original Message -
From: Ubaidul Khan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 9:45 AM
Subject: [PHP-DB] inserting mysql data using php array???
Hi
I am running Apache 1.3.20 with MySQL 3.23.41, and PHP 4.0.6, on Linux
Mandrake 8.1. I am trying to access a MySQL database from a PHP script. I
have a html form, that takes input in an array (ie. name[0], name[1],
name[2], name[3], these fields represent first_name, middle_initial,
last_name, and suffix in the database). What I would really like to do is,
take this array of data and insert each element in the corresponding column,
in the database. Is it possible to insert each element of the array into
the database, using an array, instead of typing out each value?
--
Thanks
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RE: [PHP-DB] inserting mysql data using php array???
I actually have an easy way to do INSERTs like this.
First I create the array:
$MyArray[field] = value;
$MyArray[name] = Jonathan;
$MyArray[age] = 123;
$MyArray[email] = $email_address;
and then I define this function somewhere in a function library:
function Array2Query($dbArray)
{
foreach($dbArray as $dbField = $dbValue)
{
$dbQuery .= $dbField='$dbValue',;
}
$dbQuery = substr($dbQuery,0,strlen($dbQuery)-1);
return $dbQuery;
}
and then I just create the query:
$Query = INSERT INTO table SET . Array2Query($MyArray);
$Result = mysql_query($Query);
Hope it helps.
- Jonathan
-Original Message-
From: justin gruenberg [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, November 27, 2001 2:59 PM
To: [EMAIL PROTECTED]
Subject: Re: [PHP-DB] inserting mysql data using php array???
meaning
INSERT INTO table (first_name,middle_name,last_name,suffix)
VALUES($an_array)
no. that is not possible.
you do actually have to write it out..
INSERT INTO table (first_name,middle_name,last_name,suffix)
VALUES('$name[0]', '$name[1]', '$name[2]', $name[3])
I dont understand why you have these in arrays if they are only simple text
inputs. it'd be much easier to understand your code visually if you had the
name of each field actually descriptive of the content in it. It is also
not valid html to have [ ]'s in the name parameter, I believe.
- Original Message -
From: Ubaidul Khan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 27, 2001 9:45 AM
Subject: [PHP-DB] inserting mysql data using php array???
Hi
I am running Apache 1.3.20 with MySQL 3.23.41, and PHP 4.0.6, on Linux
Mandrake 8.1. I am trying to access a MySQL database from a PHP script. I
have a html form, that takes input in an array (ie. name[0], name[1],
name[2], name[3], these fields represent first_name, middle_initial,
last_name, and suffix in the database). What I would really like to do is,
take this array of data and insert each element in the corresponding column,
in the database. Is it possible to insert each element of the array into
the database, using an array, instead of typing out each value?
--
Thanks
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[PHP-DB] Re: Common DB Abstraction Layer:
Hello, Tomas V.V.Cox wrote: Manuel Lemos wrote: Hello, John Lim wrote: Each designer has a different point of view, like Tomas has written a really excellent oci8 select limit emulation, but looking at the code, it's so complicated that i decided not to incorporate it in ADODB because I value simplicity. I know Tomas' code works in theory, and its really impressive that you even considered UNIONs, Tomas, but I just like simple code that I can keep in my head. But it does not work with computed columns like those that apply functions (COUNT, SUM, SUBSTRING, etc...). The code assumes that you are actually selecting only real table fields. I think it also does not work with columns with table name prefixes. That's partially true. But it's a common practise to use column aliases in conyunction with functions (and a must for assoc fetchs) and this is supported by the code I wrote, for ex: select count(field) as count from foo; That would work, but you require people to change their queries. I guess that does not work as general practice because. Also if Oracle name a sum(foo) column as sum will be trivial to add it. Any way I said it later, a real SQL parser will be the solution. Stig came with the idea time ago and nowadays it will help a lot in many other cases. I think that for Oracle there is a better solution that does not require Oracle to fully run queries that may return millions of rows, when you just want to return the first. That solution is to use server side cursors. Regards, Manuel Lemos -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] PHP Oracle (oci8)
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hello php-db, We have a RedHat Linux 7.1 system running PHP 4.0.4. It connects to an oracle database which is sitting behind a firewall. When a persistent connection is opened from apache, it apparently times out over the firewall and gets disconnected. For various reasons the firewall can't be changed to eliminate this timeout. For some reason there is a problem in that PHP doesn't recognize that the connection is down and merrily continues working until it gets a database error. Restarting apache solves the problem temporarily, but it always reappears. I also tried php 4.0.6 with no difference in the result. Does anybody have any ideas? On an related note, in the changelog for 4.1 it mentions about a fix for a differnet database problem. Has anybody back-ported this fix, and if so, where would I find it? Thanks in advance. JBB Jonathan B. Bayer mailto:[EMAIL PROTECTED] -BEGIN PGP SIGNATURE- Version: GnuPG v1.0.6 (MingW32) Comment: For info see http://www.gnupg.org iEYEARECAAYFAjwEJfoACgkQxQhxe/20cF4laQCgzsTgodmvs4Dc2CmHsg9ADKRs U0kAnAuPl041oWQ4SgwleCXQEtbBBo3t =nksA -END PGP SIGNATURE- -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] date format question
hi, i'm wondering if anyone could help me in formatting a date so it is 5 hours ahead of the server time. here's the code i'm using but it doesn't seem to work: $date = date(F dS, Y g:i:s A, mktime(date(g)+5,date(i),date(s),date(m),date(d),date(Y)) ); i've already looked in the manual and around the net for stuff, but wasn't able to find anything for what i needed. if anyone could help out, i'd appreciate it. thanks, Matt
RE: [PHP-DB] date format question
try H as your hour format (date(H)+5) although out of interest, at 9:51am, using either g or H gives me 2:51 pm HTH /beau // -Original Message- // From: Matt Nigh [mailto:[EMAIL PROTECTED]] // Sent: Wednesday, 28 November 2001 9:48 AM // To: php-db // Subject: [PHP-DB] date format question // // // hi, // i'm wondering if anyone could help me in formatting a date // so it is 5 hours ahead of the server time. // here's the code i'm using but it doesn't seem to work: // // $date = date(F dS, Y g:i:s A, // mktime(date(g)+5,date(i),date(s),date(m),date(d),da // te(Y)) ); // // i've already looked in the manual and around the net for // stuff, but wasn't able to find anything for what i needed. // if anyone could help out, i'd appreciate it. // // thanks, // // // Matt // -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] Oracle row limit support
Manuel Lemos wrote: But it does not work with computed columns like those that apply functions (COUNT, SUM, SUBSTRING, etc...). The code assumes that you are actually selecting only real table fields. I think it also does not work with columns with table name prefixes. That's partially true. But it's a common practise to use column aliases in conyunction with functions (and a must for assoc fetchs) and this is supported by the code I wrote, for ex: select count(field) as count from foo; That would work, but you require people to change their queries. I guess that does not work as general practice because. Also if Oracle name a sum(foo) column as sum will be trivial to add it. I ran a query without the column alias and seems that Oracle names that column with the entire name for ex: sum(foo). If that is true the support could be completed. I'll try it when get some free time or if some kind guy could send the output of this: $db = DB::connect(oci8://...); print_r($db-getRow(select count(somefield) from table, DB_FETCHMODE_ASSOC)); here, would be so great :-) Tomas V.V.Cox -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
[PHP-DB] Re: Table Locking...
Hi. Please stop cross-posting and use the appropriate forum. On Wed, Nov 21, 2001 at 03:27:23PM -0700, [EMAIL PROTECTED] wrote: (PHP-DB folks, ignore this top question - unless you want to answer) Which type of DB/Table provides table locking while a process is altering data? ISAM and MyISAM. BDB has page locking. InnoDB has row locking. I don't care for locking while using SELECTs, but I do need locking when something's being INSERTed or UPDATEd, so I won't get two processes trying to do the same darned thing at the same time. Well, the above was about implicit locking. If you use LOCK TABLE, you will always get the whole table locked, I think. (MySQL folks, ignore this bottom question - unless you want to answer) I'm trying to go through a table and check for a particular information. If it doesn't exist, then go ahead and issue an INSERT with the relevant data. The next time another process comes along, it'll obviously find the information and issue an UPDATE instead. But, what happens if I get two processes running at the same time, trying to find information that does not exist yet? You will get concurrency problems. More serious answer: There are several solutions to this problem. One is the beforementioned LOCK TABLE. If both issue a SELECT and find the information not there, both will try to issue an INSERT, where really I want one of those processes to wait for the first one to finish doing whatever it needs to do, prior to continuing. (all of this is being done in PHP by the way). Does anyone have any suggestions for this scenario (or am I just blowing smoke out my arse and there's something else, internally, that I'm not aware of?) No. You have to program your application to take care of this. How should MySQL know that are want to issue a INSERT after the SELECT? When (and how) to issue some sort of wait state for one process while the other's finishing what it needs to do, then restart the second process (which should re-check for existing information, and not blindly issue another INSERT right after the first one). Another method is assure uniqueness via keys and to simply issue the INSERT and retry with an UPDATE if the INSERT failed (because the row already existed). In this case you don't need LOCK TABLE. Bye, Benjamin. -- [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
