how include Setup Connections and Parser?
var mysql = require('mysql');
var pool = mysql.createPool({
host : 'localhost',
user : 'medb',
password : '123458',
database : 'test',
connectionLimit: 100
});
What would be next ?
Hi this is complete step to get mysql connection with pool request.
var mysql = require('mysql');
//Setup Connections and Parser
var pool = mysql.createPool({
host : 'localhost',
user : 'me',
password : '12345',
database : 'A2014',
connectionLimit: 100
});
pool.getConnection(function(err, connection) {
connection.query( 'select count(9) from mytbl;', function(err, rows) {
connection.release();
});
pool.end();
});
Related
I'm trying to connect to an external mysql database from nodejs using util.pomisify. Below is my code
var http = require('http');
var mysql = require('mysql');
var async = require('async');
var util = require('util');
var dbCon = mysql.createPool({
host : '169.255.58.96',
user : 'username',
password : 'password',
database : 'database',
acquireTimeout : 1000000,
connectTimeout : 1000000,
waitForConnections : true,
queueLimit : 0
});
var query = util.promisify(dbCon.query).bind(dbCon);
But I get time out error. Then I try to connect to the database directly without using util.promisify
var mysqliQuery = dbCon.getConnection((err, connected) => {
console.log('Connecting to Database');
if(!err)
console.log('Database Connected');
else
console.log(err.code);
});
But I still get the ERTIMEDOUT message... Please can someone tell me what I'm doing wrong?
You can try this as a connection creation
const mysql = require('mysql');
const db = mysql.createConnection({
host : '169.255.58.96',
user : 'username',
password : 'password',
database : 'database',
acquireTimeout : 1000000,
connectTimeout : 1000000,
waitForConnections : true,
queueLimit : 0
});
and to make sure if you are connected or not use this:
db.connect((error)=>{
if (error){
console.log(error)
} else {
console.log("Connected..")
}
});
I want to connect my database with nodejs but it's not connecting and giving an Error: connect ETIMEDOUT.
My code is...
var con = mysql.createConnection({
host: hostname,
user: user,
password: pass,
database: database_name,
});
con.connect(function (error) {
if (error) console.log("Not Connected: " + error);
else console.log("connected");
});
const mysql = require('mysql');
const dbPool = mysql.createPool({
connectionLimit : 10,
port : 'port of your Db',
host : 'host of your Db,
user : 'user of your Db,
password : 'password of your Db,
database : 'database name,
dateStrings : true,
debug : false
});
I'm using connection pooling in NodeJS with MySQL. There are several connections remain in processlist in Sleep state, which results too many connection in the end even if site does not have heavy traffic.
Here is sample code as I'm using it:
var pool = mysql.createPool({
host: '127.0.0.1',
user: '***',
password: '***',
database: '****'
});
pool.getConnection(function (err, connection) {
connection.query("SELECT * from test", function (error, data) {
connection.release();
if (error) {
console.log(error);
} else {
// perform further process
}
});
});
Is connection not released at proper location? Suggest if there could be any improvement in code above.
That is what pool does, you can add connection limit...
var pool = mysql.createPool({
connectionLimit : 10,
host: '127.0.0.1',
user: '***',
password: '***',
database: '****'
});
I'm getting error :
error:Error: Handshake inactivity timeout
I connected mysql to node by like this.
Install mysql
npm install mysql
var mysql = require('mysql');
let connection = mysql.createConnection({
host: 'localhost',
user: 'root',
port: '8888', /* port on which phpmyadmin run */
password: 'root',
database: 'dbname',
socketPath: '/Applications/MAMP/tmp/mysql/mysql.sock' //for mac and linux
});
connection.connect(function(err) {
if (err) {
return console.error('error: ' + err.message);
}
console.log('Connected to the MySQL server.');
});
You can use node-mysql, It very easy to use. I have used once, Here is the example :-
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'localhost',
user : 'me',
password : 'secret',
database : 'my_db'
});
connection.connect();
connection.query('SELECT 1 + 1 AS solution', function(err, rows, fields) {
if (err) throw err;
console.log('The solution is: ', rows[0].solution);
});
connection.end();
Use Connection Pool:
var mysql = require('mysql');
var pool = mysql.createPool({
host : 'example.org',
user : 'bob',
password : 'secret'
});
pool.getConnection(function(err, connection) {
// Use the connection
connection.query( 'SELECT something FROM sometable', function(err, rows) {
// And done with the connection.
connection.release();
// Don't use the connection here, it has been returned to the pool.
});
});
What does the connection.connect() do in node-mysql library?
My code looks like this
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'ap-cdbr-azure-east-a.cloudapp.net',
user : '<user>',
password : '<password>',
database : '<database>',
});
connection.connect();
Later I run the query.
Even if I remove connection.connect() the code works as is. Some examples have it, some don't. What is the specific purpose for connect() ?
The recommended way to establish a connection is this:
var mysql = require('mysql');
var connection = mysql.createConnection({
host : 'example.org',
user : 'bob',
password : 'secret',
});
connection.connect(function(err) {
// connected! (unless `err` is set)
});
However, a connection can also be implicitly established by invoking a query:
var mysql = require('mysql');
var connection = mysql.createConnection(...);
connection.query('SELECT 1', function(err, rows) {
// connected! (unless `err` is set)
});
Depending on how you like to handle your errors, either method may be appropriate. Any type of connection error (handshake or network) is considered a fatal error.
Courtesy: https://github.com/felixge/node-mysql