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• PHP and MySQL related Problem

  - by Tareq

  Hi friends, I have a local LAN to my office. Recently I designed a New Software system using PHP, MySQL for my office. My boss wants to see the reports from online. My problem is, my network connection is often failed to my office. But I have to input all time. So, now I want to use two instances of my software. One will be using the LAN and one will be uploaded to my server. My question is, how can I easily keep the both databases up-to-date always? Please help me with this issue. If you want more info please feel free to ask me.

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• table alias (or 'symlink') in mysql

  - by andreash

  Hi there, in MySQL5.1, is there a way to make one table accessible by two different names? I'm thinking about somethink like a symlink on linux filesystems. I know theres the CREATE VIEW myview AS SELECT * FrOM mytable thing, but I don't only need to SELECT from both names, but also delete etc ... You might ask why I want to do this? It's about getting a commercial, closed-source app to work, which is crappily programmed (usually, the table names are all lower-case, but occasionally, they use capitalized names for the same table ...). Oh, that would be another idea: Is there a way to tell MySQL not to care about capitalization of table names (like on Windows filesystems?)? that would also do the trick ... Thanks for your insight! A.

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• MySQL 5.0 Unavailable but still working every monday morning

  - by user1578031

  So I have a MySQL server with 4-5 databases and every monday morning, I can't login with PHPmyAdmin or the cmd line tools or options and the funny thing is the connection can be made later in the day around 3:30 - 4PM. I can't replicate the issues on any dev boxes and cant upgrade to 5.5 for a number of reasons. I want to try and poll the sql databases with a simple script and just connect to it and then disconnect. I'm not very good with SQL but would like to know if anyone could help with a script which I can automate to run sunday every 30mins or so, to see if the issue can be stopped by the database being connected to over the very quiet period of sunday... After this im out of ideas and have to wait for the HW/SW refresh to get 5.5 on there...

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• AWS RDS Mysql with benstalk Hibernate app: Character encoding issue

  - by TeraTon

  I'm running a webapp from amazon rds with tomcat 7 and spring, which uses hibernate as the persistence layer. The application and utf-8 encoding work properly on localhost, but for some reason when I deploy to amazon, the UTF-8 encoding breaks. I use mysql 5.5.27 on amazon rds and the table that we wish to update has collation set to utf8 - utf8_unicode_ci And in hibernate I have set: < prop key="hibernate.connection.charSet"UTF-8 UTF-8 characters get replaced by ??? and this is of course especially bad for passwords and usernames + email as it basically kills them. Anyone else encountered character encoding breaking when deploying to amazon?

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• Howto dianostic problem in MySQL Cluster?

  - by maj

  Hi, I have set up a MySQL cluster following exactly this howto. Page 1 is completed, but the problem I can see the nodes in ndb_mgm for a little while, and then I get ndb_mgm> show; Cluster Configuration --------------------- [ndbd(NDB)] 2 node(s) id=2 (not connected, accepting connect from 192.168.0.101) id=3 (not connected, accepting connect from 192.168.0.102) [ndb_mgmd(MGM)] 1 node(s) id=1 @192.168.0.103 (Version: 5.1.45) [mysqld(API)] 2 node(s) id=4 (not connected, accepting connect from any host) id=5 (not connected, accepting connect from any host) ndb_mgm> So the questions is; How do I diagnostic this problem? Does there exist log files I can look in?

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• Upgrading php, mysql, and apache

  - by Kevin

  I have been looking around and have not found a good answer to my question. I currently have php 5.3.3 installed via yum on my centos 6.3 server. I need to upgrade to php 5.10 or later. It is my understanding that you need to find the correct mysql and apache packages that fit with the php install. Can someone please point me in the direction of a an update guide? Btw I am not looking for "yum update httpd php5" this gets me the old 5.3.3 version. Thanks, Kevin.

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• MySQL Cluster transaction isolation level - READ_COMMITTED

  - by Doori Bar

  I'm learning by mostly reading the documentation. Unfortunately, http://dev.mysql.com/doc/refman/5.1/en/set-transaction.html#isolevel_read-committed doesn't say anything, while it says everything. Confused? Me too. ndb engine supports only "READ_COMMITTED" transaction isolation level. A. It starts by saying "sets and reads its own fresh snapshot", which I translate to: The transaction is having a separated 'zone' which whatever it stores there - is what it reads back. B. While out-side of the transaction, the old-values are unlocked. C. It continues with: "for locking reads" sentence - No idea what it means. Question: they claim only READ_COMMITTED transaction isolation level is supported, but while handling a BLOB or a TEXT, they say the isolation is now "locked for reading" too. So is it a contradiction? can a transaction LOCK for reading just as well while handling something other than BLOB/TEXT? (such as integers)

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• Regular expression in mySQL [migrated]

  - by Rayne

  I have a mysql table that has 2 columns - Column 1 contains a string value, and Column 2 contains the number of times that string value occurred. I'm trying to find the string abc.X.def, where the beginning of the string is "abc.", followed by one or more characters, then the string ".def". There could be more characters following ".def". How can I find such strings, then add the occurrence of such strings and display the results? For example, if I have abc.111.def23 1 abc.111.def 2 abc.22.def444 1 abc.111.def 1 Then I will get abc.111.def23 1 abc.111.def 3 abc.22.def444 1 Thank you.

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• Connect to my virtualbox mysql server

  - by WebweaverD

  I wonder if someone here could help me, this is my set up: I am on a windows 7 machine running a ubuntu virtualbox as my local web server and database server (mysql). I have just got hold of a copy of Komodo which i am running on my windows machine which I would like to hook up to my database. The fields it needs are hostname, port, socket, username and password. I know the username/password but am unsure how to find out what to put for the other fields. The ubuntu vb has an ip of 192.168.0.10, which is in my hosts file as http://swishprint.dev I hope I have asked this in the right place, any help much appreciated.

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• MySQL Procedure causing Dead Lock

  - by Phanindra

  I am using MySQL server 5.1.45. And I am having a procedure with huge business logic. With less number of invocation of this procedure, my application is working fine, but when the number of invocations are getting increased this procedure is throwing Lock wait timeout exception. My Question is will Procedure creates temporary tables dynamically..? As in my procedure I am using Truncate statement which may cause to release all transactions. I am not DBA, please help me out of this.

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• phpmyadmin or other mysql gui - edit whole table from one screen

  - by lorem

  Let's say I have table in database. I'd like to be able to view all data from this table and be able to edit every field from single screen. I tried to do this in phpmyadmin but I'm not sure how... I can see all data but I have to click edit on single field and then I'm sent to next screen, can't really edit everything at once. How do I do this in phpmyadmin or other mysql gui? I'm on Linux, my server too. I'd like each field in table to be editable text field - maybe this will show better what I'm searching for.

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• Specific apache + mysql settings for a light-weight site

  - by Good Person

  I have a small website with a Joomla and a Moodle set up. It seems that both of these are very slow. The server (CentOS release 5.5 (Final)) is a virtual dedicated server with about 2GB of ram. I don't expect to ever get more than 10-15 people on at the same time (and if that is high) What settings could I change in either apache, mysql, or even the OS to increase the performance of my site? I'm not concerned about running out of resources if I get too many visitors. If you need more specific data leave a comment and I'll edit the question.

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• Mysql process goes over 100% of CPU usage

  - by Temnovit

  Hello! I'm experiencing some problems with my LAMP server. Recently, everything became very slow, even though visitor count on my websites didn't change to much. When I run top command, it sais that mysql process has taken over 150-200% of CPU. How's that possible, I always thought that 100% is a maximum? I'm running Ubuntu 9.04 server edition with 1,5 GB RAM my.cnf settings: key_buffer = 64M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 myisam-recover = BACKUP max_connections = 200 table_cache = 512 table_definition_cache = 512 thread_concurrency = 2 read_buffer_size = 1M sort_buffer_size = 4M join_buffer_size = 1M query_cache_limit = 1M # the maximum size of individual query results query_cache_size = 128M Here is the output of MySQLTuner: The top command: What could be the cause of this problem? Can I make changes to my my.cnf to prevent server from hanging?

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• MySQL server simple insert/update/delete queries are taking a long time to execute

  - by ElGabbu

  We have a VPS hosting server with a MySQL server running on it. We host several databases for client's websites. Recently we have noticed that insert/update and delete queries are taking a long time to execute sometimes as close as 30 seconds. I use the following command to see these queries being executed: watch -n1 mysqladmin proc stat We have still not been able to track the root of this problem. I would apprecite if anyone had any pointers as to what we can check or improve to resolve the issue. Thanks

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• Open table cache in MySQL

  - by vvanscherpenseel

  I have my open table cache set to 1800 and I have a total of 1112 tables. MySQL Tuning Primer reports that 100% of my table cache is used yet my table cache hit rate is 5%. I understand that this happens due to concurrent connections all opening tables. I think I should raise the cache limit. I understand that the cache size is limited by the file descriptor limit of my operating system, but are there any other practical limitations I should be aware of? Searching Google or this very website yields mostly posts explaining the connection-factor or come up with indecisive answers. My question: can I safely increase the open table cache limit? Is there a maximum?

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• postfix + mysql, user unknown

  - by stoned

  I have installed postfix with dovecot and postfix admin and all seemed well at the beginning. I can log in with thunderbird and check the mailboxes (all empty now) and TRY to send mail, even TLS works. The problem comes when I try to send mail. This is the output of mail.log when I try to send mail from an address to the same address: Nov 23 16:41:55 mailforge postfix/local[6322]: 297792467C: to=, relay=local, delay=0.01, delays=0/0/0/0.01, dsn=5.1.1, status=bounced (unknown user: "test") Nov 23 16:41:55 mailforge postfix/qmgr[6293]: 297792467C: removed To me it looks like as if postfix tries to look for the user "test" while in the mysql database users are named as [email protected] . Where should I change this behaviour?

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• Configure phpMyAdmin to connect to another MySql server

  - by Spirit

  I have installed WAMP server on my laptop and for the sake of simplicity I want to configure phpMyAdmin to connect to a mysql server on another machine so that I can dump the database tables. If this is possible (and i believe it is), does any1 knows where is phpMyAdmin settings file located? The location of wamp on my laptop is C:\wamp. I've noticed in C:\wamp\apps\phpmyadmin3.5.1 but there are a lot of php scripts in there. Which one of this should I modify?

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• Installing old version of mysql

  - by Peter

  I'm trying to troubleshoot a database import problem and want to duplicate the environment onto another server. This will require installing an older version of mysql, but the packages that are listed are only showing a recent version. I'm currently running debian wheezy 7.1 and what was installed was the packaged 5.5.31. What is the official way to install an older copy? I guess I could hunt around Google and hope to find some files of the same version to install from source, but this doesn't seem like a reliable method.

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• setting my mysql server - limiting domains that can connect

  - by Alex

  I am trying to setup a mysql server on my machine. I would like to limit the domains that it listens for connections to. My understanding is that you can either have it listen to 1 ip or all ip's. Therefore, if i want to connect remotely I have to say all ips. Then I would like to block all domains but the ones I know should actually be connecting.. I believe this is done through windows firewall. However, how do i do this by domain instead of IP?

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• MySQL max_user_connections

  - by Sheriffen

  We're releasing a site in a couple of weeks that has been developed on a local machine but now when were testing on dev server we get MySQL error 'max_user_connections'. We have talked to the host company (biggest in sweden) and they say that we don't close our connections properly. But the thing is that we user the EXACT same code on another host where it works. And I also added echo "closed"; in the database_close function so that now in the very bottom of very page there is "closed". To me this means that we do close the connection, anyone got any idea of what could be wrong? We connect through the PHP PDO function and closes it by setting it to 'null', all according to the manual.

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• Linux filesystem suggestion for MySQL with a 100% SELECT workload

  - by gmemon

  I have a MySQL database that contains millions of rows per table and there are 9 tables in total. The database is fully populated, and all I am doing is reads i.e., there are no INSERTs or UPDATEs. Data is stored in MyISAM tables. Given this scenario, which linux file system would work best? Currently, I have xfs. But, I read somewhere that xfs has horrible read performance. Is that true? Should I shift the database to an ext3 file system? Thanks

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• How to handle monetary values in PHP and MySql?

  - by Songo

  I've inherited a huge pile of legacy code written in PHP on top of a MySQL database. The thing I noticed is that the application uses doubles for storage and manipulation of data. Now I came across of numerous posts mentioning how double are not suited for monetary operations because of the rounding errors. However, I have yet to come across a complete solution to how monetary values should be handled in PHP code and stored in a MySQL database. Is there a best practice when it comes to handling money specifically in PHP? Things I'm looking for are: How should the data be stored in the database? column type? size? How should the data be handling in normal addition, subtraction. multiplication or division? When should I round the values? How much rounding is acceptable if any? Is there a difference between handling large monetary values and low ones? Note: A VERY simplified sample code of how I might encounter money values in everyday life: $a= $_POST['price_in_dollars']; //-->(ex: 25.06) will be read as a string should it be cast to double? $b= $_POST['discount_rate'];//-->(ex: 0.35) value will always be less than 1 $valueToBeStored= $a * $b; //--> any hint here is welcomed $valueFromDatabase= $row['price']; //--> price column in database could be double, decimal,...etc. $priceToPrint=$valueFromDatabase * 0.25; //again cast needed or not? I hope you use this sample code as a means to bring out more use cases and not to take it literally of course. Bonus Question If I'm to use an ORM such as Doctrine or PROPEL, how different will it be to use money in my code.

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• C++ scoping error

  - by Pat Murray

  I have the following code: #include "Student.h" #include "SortedList.h" using namespace std; int main() { // points to the sorted list object SortedList *list = new SortedList; //This is line 17 // array to hold 100 student objects Student create[100]; int num = 100000; // holds different ID numbers // fills an array with 100 students of various ID numbers for (Student &x : create) { x = new Student(num); num += 100; } // insert all students into the sorted list for (Student &x : create) list->insert(&x); delete list; return 0; } And I keep getting the compile time error: main.cpp: In function ‘int main()’: main.cpp:17: error: ‘SortedList’ was not declared in this scope main.cpp:17: error: ‘list’ was not declared in this scope main.cpp:17: error: expected type-specifier before ‘SortedList’ main.cpp:17: error: expected `;' before ‘SortedList’ main.cpp:20: error: ‘Student’ was not declared in this scope main.cpp:20: error: expected primary-expression before ‘]’ token main.cpp:20: error: expected `;' before ‘create’ main.cpp:25: error: expected `;' before ‘x’ main.cpp:31: error: expected primary-expression before ‘for’ main.cpp:31: error: expected `;' before ‘for’ main.cpp:31: error: expected primary-expression before ‘for’ main.cpp:31: error: expected `)' before ‘for’ main.cpp:31: error: expected `;' before ‘x’ main.cpp:34: error: type ‘<type error>’ argument given to ‘delete’, expected pointer main.cpp:35: error: expected primary-expression before ‘return’ main.cpp:35: error: expected `)' before ‘return’ My Student.cpp and SortedList.cpp files compile just fine. They both also include .h files. I just do not understand why I get an error on that line. It seems to be a small issue though. Any insight would be appreciated. UPDATE1: I originally had .h files included, but i changed it when trying to figure out the cause of the error. The error remains with the .h files included though. UPDATE2: SortedList.h #ifndef SORTEDLIST_H #define SORTEDLIST_H #include "Student.h" /* * SortedList class * * A SortedList is an ordered collection of Students. The Students are ordered * from lowest numbered student ID to highest numbered student ID. */ class SortedList { public: SortedList(); // Constructs an empty list. SortedList(const SortedList & l); // Constructs a copy of the given student object ~SortedList(); // Destructs the sorted list object const SortedList & operator=(const SortedList & l); // Defines the assignment operator between two sorted list objects bool insert(Student *s); // If a student with the same ID is not already in the list, inserts // the given student into the list in the appropriate place and returns // true. If there is already a student in the list with the same ID // then the list is not changed and false is returned. Student *find(int studentID); // Searches the list for a student with the given student ID. If the // student is found, it is returned; if it is not found, NULL is returned. Student *remove(int studentID); // Searches the list for a student with the given student ID. If the // student is found, the student is removed from the list and returned; // if no student is found with the given ID, NULL is returned. // Note that the Student is NOT deleted - it is returned - however, // the removed list node should be deleted. void print() const; // Prints out the list of students to standard output. The students are // printed in order of student ID (from smallest to largest), one per line private: // Since Listnodes will only be used within the SortedList class, // we make it private. struct Listnode { Student *student; Listnode *next; }; Listnode *head; // pointer to first node in the list static void freeList(Listnode *L); // Traverses throught the linked list and deallocates each node static Listnode *copyList(Listnode *L); // Returns a pointer to the first node within a particular list }; #endif #ifndef STUDENT_H #define STUDENT_H Student.h #ifndef STUDENT_H #define STUDENT_H /* * Student class * * A Student object contains a student ID, the number of credits, and an * overall GPA. */ class Student { public: Student(); // Constructs a default student with an ID of 0, 0 credits, and 0.0 GPA. Student(int ID); // Constructs a student with the given ID, 0 credits, and 0.0 GPA. Student(int ID, int cr, double grPtAv); // Constructs a student with the given ID, number of credits, and GPA.\ Student(const Student & s); // Constructs a copy of another student object ~Student(); // Destructs a student object const Student & operator=(const Student & rhs); // Defines the assignment operator between two student objects // Accessors int getID() const; // returns the student ID int getCredits() const; // returns the number of credits double getGPA() const; // returns the GPA // Other methods void update(char grade, int cr); // Updates the total credits and overall GPA to take into account the // additions of the given letter grade in a course with the given number // of credits. The update is done by first converting the letter grade // into a numeric value (A = 4.0, B = 3.0, etc.). The new GPA is // calculated using the formula: // // (oldGPA * old_total_credits) + (numeric_grade * cr) // newGPA = --------------------------------------------------- // old_total_credits + cr // // Finally, the total credits is updated (to old_total_credits + cr) void print() const; // Prints out the student to standard output in the format: // ID,credits,GPA // Note: the end-of-line is NOT printed after the student information private: int studentID; int credits; double GPA; }; #endif

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• C++ error message output format

  - by sub

  If I want to trigger an error in my interpreter I call this function: Error( ErrorType type, ErrorSeverity severity, const char* msg, int line ); However, with that I can only output Name error: Undefined variable in line 1 instead of Name error: Undefined variable 'someVariableName' in line 1 I'm working entirely with strings (except for the error messages as they all are constant at the moment), so sprintf won't work. What is the best way to create an efficient error function that can output a constant message combined with a string that describes which object, e.g.: a non-existing variable, triggered the error?

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• mysqldb interfaceError

  - by Johanna

  I have a very weird probleme with mysqldb (mysql module for python). I have a file with queries for inserting records in tables. If I call the functions from the file, it works just fine. But when I try to call one of the functions from another file it throws me a _mysql_exception.InterfaceError: (0, '') I really don't get what I'm doing wrong here.. I call the function from buildDB.py : import create create.newFormat("HD", 0,0,0) The function newFormat(..) is in create.py (imported) : from Database import Database db = Database() def newFormat(name, width=0, height=0, fps=0): format_query = "INSERT INTO Format (form_name, form_width, form_height, form_fps) VALUES ('"+name+"',"+str(width)+","+str(height)+","+str(fps)+");" db.execute(format_query) And the class Databse is the following : import MySQLdb from MySQLdb.constants import FIELD_TYPE class Database(): def __init__(self): server = "localhost" login = "seq" password = "seqmanager" database = "Sequence" my_conv = { FIELD_TYPE.LONG: int } self.conn = MySQLdb.connection(host=server, user=login, passwd=password, db=database, conv=my_conv) # self.cursor = self.conn.cursor() def close(self): self.conn.close() def execute(self, query): self.conn.query(query) (I put only relevant code) Traceback : Z:\sequenceManager\mysql>python buildDB.py D:\ProgramFiles\Python26\lib\site-packages\MySQLdb\__init__.py:34: DeprecationWa rning: the sets module is deprecated from sets import ImmutableSet INSERT INTO Format (form_name, form_width, form_height, form_fps) VALUES ('HD',0 ,0,0); Traceback (most recent call last): File "buildDB.py", line 182, in <module> create.newFormat("HD") File "Z:\sequenceManager\mysql\create.py", line 52, in newFormat db.execute(format_query) File "Z:\sequenceManager\mysql\Database.py", line 19, in execute self.conn.query(query) _mysql_exceptions.InterfaceError: (0, '') The warning has never been a problem before so I don't think it's related.

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