[PHP] Mysql_free_result() doubt
Hi to all, I am little bit confused to use the mysql_free_result($result) function.because i searched google - they told dont use this function to php 4.X and also it says clearly When you are done with a result set, you must free the memory it uses by calling mysql_free_result(). I mean something like when to use or not to use it? I already know that only SELECT queries that retrieve rows require to free resources, but maybe when all data is retrieved the resources are free automatically or we need to call mysql_free_result() to free the memory. and also this function will free only one row at a time or all the rows of the result set . A.suresh - Find out what India is talking about on - Yahoo! Answers India Send FREE SMS to your friend's mobile from Yahoo! Messenger Version 8. Get it NOW
Re: [PHP] Mysql_free_result() doubt
On Tue, September 26, 2006 8:44 am, suresh kumar wrote: I am little bit confused to use the mysql_free_result($result) function.because i searched google - they told dont use this function to php 4.X and also it says clearly When you are done with a result set, you must free the memory it uses by calling mysql_free_result(). I mean something like when to use or not to use it? I already know that only SELECT queries that retrieve rows require to free resources, but maybe when all data is retrieved the resources are free automatically or we need to call mysql_free_result() to free the memory. and also this function will free only one row at a time or all the rows of the result set . PHP is going to free the data when your script ends, so most common uses of MySQL don't even need mysql_free_result, as your page doesn't do anything after it's done with MySQL anyway. In some scripts, you are done with a large result set, and can gain some performance by releasing all the resources tied to that result set. The argument to mysql_free_result is a result resource, and it frees ALL the records, as you call it, and any other resources that result set is using. -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] mysql_free_result() question
Do I mysql_free_result the $Query or the $Result? If it's $Result, would this be the same as just going unset($Result)? mysql_free_result() frees the ressources that the MySQL server allocated for the results of your query. This is in the memory space of the MySQL server, while if you unset($Result), it only frees the MySQL result id (an integer if I remember corretly) in the memory space of your script. So, no, calling unset() is not the same to call mysql_free_result(). I could be wrong, and often am :-), but I believe that PHP4 knows about MySQL resources, and if you don't have any variables capable of accessing them any more (IE, you did unset($result)), then it's smart enough to do the mysql_free_result for you... This is, however, no excuse for you not writing less sloppy code in the first place, now that you are educated enough to know what you are doing. :-) Use mysql_free_result() if the memory de-allocation is important to you. -- WARNING [EMAIL PROTECTED] address is an endangered species -- Use [EMAIL PROTECTED] Wanna help me out? Like Music? Buy a CD: http://l-i-e.com/artists.htm Volunteer a little time: http://chatmusic.com/volunteer.htm -- PHP General 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] mysql_free_result() question
I'm a bit unclear as to which result it is I use this function on. So lets say I; $Query = mysql_query(SELECT something FROM here); $Result = mysql_fetch_assoc($Query); Do I mysql_free_result the $Query or the $Result? If it's $Result, would this be the same as just going unset($Result)? Thanks, Chris -- If you don't find it in the index, look very carefully through the entire catalogue. - Sears, Roebuck, and Co., Consumer's Guide, 1897 -- PHP General 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] mysql_free_result() question
Do I mysql_free_result the $Query or the $Result? If it's $Result, would this be the same as just going unset($Result)? mysql_free_result() frees the ressources that the MySQL server allocated for the results of your query. This is in the memory space of the MySQL server, while if you unset($Result), it only frees the MySQL result id (an integer if I remember corretly) in the memory space of your script. So, no, calling unset() is not the same to call mysql_free_result(). Hope this helps. Kristian -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] mysql_free_result() question
You should call mysql_free_result($Query) !! It all becomes a little clearer if you change the names of the variables as such: $result = mysql_query(select ...); $row = mysql_fetch_assoc($result); That is, mysql_query() returns a result, and mysql_fetch_*() returns a row from such a result. Using mysql_free_result on a row is not advisable. Also, in my terminology, the query would be the string passed to mysql_query(), so you could do like this: $query = select ...; $result = mysql_query($query); $row = ... Regards, Jakob Kruse Chris Cameron [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... I'm a bit unclear as to which result it is I use this function on. So lets say I; $Query = mysql_query(SELECT something FROM here); $Result = mysql_fetch_assoc($Query); Do I mysql_free_result the $Query or the $Result? If it's $Result, would this be the same as just going unset($Result)? Thanks, Chris -- If you don't find it in the index, look very carefully through the entire catalogue. - Sears, Roebuck, and Co., Consumer's Guide, 1897 -- PHP General 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] mysql_free_result
Does php release the memory used by the result set when it is done executing? if so why should I use mysql_free_result() Thanks Randy -- PHP General 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] mysql_free_result
Does php release the memory used by the result set when it is done executing? Correct if so why should I use mysql_free_result() In case you are making multiple queries within the same script and want to keep your runtime memory usage low. -Rasmus -- PHP General 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] mysql_free_result
Does the Mysql_free_result slow down the script at all? Randy -Original Message- From: Rasmus Lerdorf [mailto:[EMAIL PROTECTED]] Sent: Friday, April 20, 2001 8:49 PM To: Randy Johnson Cc: Php-General Subject: Re: [PHP] mysql_free_result Does php release the memory used by the result set when it is done executing? Correct if so why should I use mysql_free_result() In case you are making multiple queries within the same script and want to keep your runtime memory usage low. -Rasmus -- PHP General 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] mysql_free_result
Does the Mysql_free_result slow down the script at all? Sure, calling the function will be slower than not calling it. But not significantly since the same operation will happen automatically. The difference being that you have the option of controlling exactly when you want it to happen. -Rasmus -- PHP General 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]
