mysql-connector

问题 connectionString = "SERVER=localhost;DATABASE=NT;UID=" + dbuser + ";PASSWORD=" + dbpass + ";"; connection = new MySqlConnection(connectionString); OpenConnection(); //open connection to database private bool OpenConnection() { try { connection.Open(); return true; } catch (MySqlException ex) { //The two most common error numbers when connecting are as follows: //0: Cannot connect to server. //1045: Invalid user name and/or password. switch (ex.Number) { case 0: Console.WriteLine(" >>>> Cannot

问题 In my repository setup, I have the following: [mysql-connectors-community] name=MySQL Connectors Community baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/6/$basearch/ enabled=1 gpgcheck=1 gpgkey=file:/etc/pki/rpm-gpg/RPM-GPG-KEY-mysql Because my machine is a 64 bit machine, my basesearch is x86_64 ( see below yum-debug-dump output ): yum-debug-dump version 1 %%%%SYSTEM INFO uname: 2.6.32-573.12.1.el6.x86_64, x86_64 rpm ver: RPM version 4.8.0 python ver: 2.6.6 (r266:84292, Aug

问题 Always when I want to use programme that using mysql database, it forces me to install MySQL connector or mysql-connector-java.jar Why do I need MySQL connector and how does it work?? simple and logical explanation please!! 回答1: JDBC is a library used by your Java programs to access relational databases. You can use it to access Oracle, Informix, Microsoft SQL Server, PostgreSQL, DB2, and other makes of database server, as well as MySQL. The MySQL connector is a library for, well, connecting

问题 As far as I can tell, I have installed the MySQL Connector/Python (v1.2.3) module without a problem. This is on CentOS 5.4 using Python 2.7.7 (Anaconda distribution, although the same happens on a vanilla installation). I'm able to import it and initialize a connection with a MySQL server (v4.1.20). This server is accessed over the LAN, not locally. The is_connected() method asserts that I'm properly connected >>> import mysql.connector >>> cnx = mysql.connector.connect(<MySQL database

问题 It's been 2 days already that I am trying to understand why is this happening, however I do not have enough debugging skills to understand why is this occurring. I need to use the sql::ConnectOptionsMap so I can pass my desired connection options such as charset, etc. A simple example taken: sql::ConnectOptionsMap connection_properties; connection_properties["hostName"] = sql::SQLString("localhost"); connection_properties["userName"] = sql::SQLString("username"); connection_properties[

问题 For the past several weeks I've been working with Java and I know that this question may be dumb... I created a console application which is using the MySQL Connector to update records in a database, the problem is that when I deploy it to a jar file and run it I get that the MySQL Connector is missing. I used JDeveloper for this deployment and from the jar export settings I marked that this library needs to be exported too. I am not sure what could be the issue and any input will be welcomed

问题 Version 6.4.4: Using the most basic implementation of MySqlConnection, the following code takes 2-5 seconds per connection when preloading the connection pool to reach the "Min Pool Size" configured in my connection string. Any ideas why it is taking so long, how to fix, or workarounds? Connection String: <add name="users" connectionString="server=192.168.1.2;User Id=dbuser;password=dbpassword;database=users;Pooling=true;Min Pool Size=10;Max Pool Size=50;Persist Security Info=True;" /> Code

问题 I need to write a c/c++ application that connects to a mysql database. I have been trying to install the c & c++ connectors to be able to do this, however I keep getting undefined reference errors. Below is how I set it up, can anyone tell me what I've done wrong? I'm using WINDOWS 7 64 bit with Netbeans IDE and cygwin compiler. What I've done: I downloaded and installed win x64 version of c & c++ connectors from mysql.com I followed the tutorial Here. From the "Hello World" heading on (Just

问题 I've used jdbcpool 7.0.47 on grails app with version 2.2.4. When i checked the threaddump it shows that lots of "MySQL Statement Cancellation Timer" are in waiting state. I've also tried moving the jdbc connector to tomcat/lib but it start to give some date issues with mysql. So any other way to kill those threads 回答1: Ok evaluating all the params of connection pooling it seems validationQueryTimeOut was causing all this issue. After removing that param everything is normal. Now my working

问题 I am using following code: MySqlTransaction trnData = pconDB.BeginTransaction(); MySqlCommand cmdData = new MySqlCommand(); cmdData.Connection = pconDB; cmdData.CommandTimeout = plngQueryTimeOut; cmdData.CommandType = CommandType.Text; cmdData.CommandText = "CALL spsOME( 4, 'DATA', 389552022,@intOutReturn);"; cmdData.Transaction = trnData; plngRecordsCount = cmdData.ExecuteNonQuery(); Isn't CALL statement possible directly from .net library? The same query is working on workbench. 回答1: Change