My. SQL : : My. SQL 5. Reference Manual : : 5. Using Option Files. Using Option Files. Most My. SQL programs can read startup options from option files. Option files provide. For the My. SQL server, My.
In table items, ~ represents the current user's home directory (the value of $HOME). SYSCONFDIR represents the directory specified with the SYSCONFDIR option to CMake when MySQL was built. By default, this. Closing all the connections in a pool. When you are done using the pool, you have to end all the connections or the Node.js event loop will stay active until the connections are closed by the MySQL server. This is typically.
SQL provides a number of. To determine whether a program reads option files, invoke it with. For. mysqld, use. If the program reads. The . mylogin. cnf file that contains login. See. Section 5. 6.
My. SQL Configuration Utilityâ€. A “login pathâ€. Client programs specify which login path. To specify an alternate file name, set the. MYSQL_TEST_LOGIN_FILE environment variable.
Mysql Defaults Extra File Option In Excel
This variable is used by the mysql- test- run. My. SQL clients such. On Windows, My. SQL programs read startup options from the following.
File Name. Purpose%PROGRAMDATA%\My. SQL\My. SQL Server. PROGRAMDATA%\My. SQL\My. SQL. Server 5. 7\my. Global options%WINDIR%\my. WINDIR%\my. cnf. Global options.
はじめに. MySQLの文字について; 知っておきたいコマンド. よく使うmysqlコマンドについて. mysqlコマンドってなにするもの? mysqlコマンドのヘルプが見たい; MySQLサーバに. The mysql_history file. On Unix, the mysql client writes a record of executed statements to a history file. By default, this file is named.mysql_history and is created in your home directory. To specify a different file, set.
C: \my. ini, C: \my. Global options. INSTALLDIR\my. INSTALLDIR\my. cnf. Global optionsdefaults- extra- file. The file specified with. APPDATA%\My. SQL\.
Login path options. In table items, %PROGRAMDATA% represents the. This path defaults to. C: \Program. Data on Microsoft Windows Vista and. C: \Documents and Settings\All. Users\Application Data on older versions of Microsoft.
WINDIR% represents the location of your. Windows directory.
This is commonly. C: \WINDOWS. You can determine its exact. WINDIR. environment variable using the following command. C: \> echo %WINDIR%INSTALLDIR represents the My. SQL. installation directory. This is typically. C: \PROGRAMDIR\My.
SQL\My. SQL. 5. 7 Server where. PROGRAMDIR represents the programs. Program Files on. English- language versions of Windows), when My. SQL 5. 7. has been installed using the installation and configuration.
See Section 2. 3. Installing My. SQL on Microsoft Windows Using My. SQL Installerâ€.
APPDATA% represents the value of the Windows. You can determine its exact location.
APPDATA environment. C: \> echo %APPDATA%.
On Unix, Linux and OS X, My. SQL programs read startup options from.
File Name. Purpose/etc/my. Global options/etc/mysql/my. Global options. SYSCONFDIR/my. Global options$MYSQL_HOME/my.
Server- specific optionsdefaults- extra- file. The file specified with. User- specific options~/.
Login path options. In table items, ~ represents the current. HOME). SYSCONFDIR represents the directory. SYSCONFDIR option. CMake when My. SQL was built.
By default, this. MYSQL_HOME is an environment variable.
If. MYSQL_HOME is not set and you start the server. MYSQL_HOME as follows.
Let BASEDIR and. DATADIR represent the path names of. My. SQL base directory and data directory, respectively. As of My. SQL 5. 7.
MYSQL_HOME is not. BASEDIR. Prior to My. SQL 5. 7. 8, if there is a. DATADIR but not in.
BASEDIR. mysqld_safe sets. MYSQL_HOME to. DATADIR.
Otherwise, if there is no. DATADIR. mysqld_safe sets. MYSQL_HOME to. BASEDIR. DATADIR is commonly. The value is the data.
Use of. - -datadir at runtime has no effect. My. SQL looks for option files in the order just described and reads. If an option file that you want to use does not. If multiple instances of a given option are found, the last. There is one exception: For.
On Unix platforms, My. SQL ignores configuration files that are.
This is intentional as a security measure. Any long option that may be given on the command line when running. My. SQL program can be given in an option file as well. To get the. list of available options for a program, run it with the. The syntax for specifying options in an option file is similar to. Section 5. 2. 4, “Using Options on the Command Lineâ€). However, in an option file, you omit the leading two dashes from.
For. example, - -quick and. To specify an option of the form. Empty lines in option files are ignored. Nonempty lines can take. Comment lines start with “#â€. A. “#†comment can start in the.
After a group line. Option. group names are not case sensitive. This is equivalent to. This is equivalent to. In an option file, you can have spaces. You can. optionally enclose the value within single quotation marks or. Leading and trailing spaces are automatically deleted from option.
You can use the escape sequences. The escaping rules in option files are. If a backslash is followed by a valid escape sequence. For example. “\s†is converted to a space. If a backslash is not followed by a valid escape sequence.
For example. “\S†is retained as is. The preceding rules mean that a literal backslash can be given as. The rules for escape sequences in option files differ slightly. SQL. statements. In the latter context, if. See Section 1. 0. String Literalsâ€. The escaping rules for option file values are especially pertinent.
Windows path names, which use. A. separator in a Windows path name must be written as. It can be written as. Alternatively. “/†may be used in Windows path. Suppose that you want to specify a base directory of.
C: \Program Files\My. SQL\My. SQL Server. This can be done.
Some examples. basedir="C: \Program Files\My. SQL\My. SQL Server 5.
C: \\Program Files\\My. SQL\\My. SQL Server 5. C: /Program Files/My. SQL/My. SQL Server 5. C: \\Program\s. Files\\My. SQL\\My. SQL\s. Server\s. If an option group name is the same as a program name, options in.
For example, the. The [client] option group is read by all client. This enables you to specify options.
For example. [client] is the perfect group to use to specify. But make sure. that the option file is readable and writable only by yourself, so.
Be sure not to. put an option in the [client] group unless it. Programs that do not understand the option quit after.
Here is a typical global option file. M. max_allowed_packet=8. M. The preceding option file uses. Here is a typical user option file. The following password will be sent to all standard My. SQL clients. password="my_password".
If you want to create option groups that should be read by. My. SQL release. series only, you can do this by using groups with names of.
The. following group indicates that the. My. SQL servers with 5. TRADITIONAL. It is possible to use ! For example, to include the. To search the /home/mydir directory and read. There is no guarantee about the order in which the option files in.
Any files to be found and included using the. Unix operating. systems must have file names ending in. On Windows, this directive checks for. Write the contents of an included option file like any other.
That is, it should contain groups of options, each. While an included file is being processed, only those options in. Other. groups are ignored. Suppose that a my. And suppose that /home/mydir/myopt. M. If my. cnf is processed by.
If. the file is processed by mysqladmin, only the. If the file is. processed by any other program, no options in. The ! includedir directive is processed.
A pure node. js Java. Script Client implementing the My. Sql protocol. Table of Contents.
Install. For information about the previous 0. Sometimes I may also ask you to install the latest version from Github to check. In this case, please do: $ npm install mysqljs/mysql. Introduction. This is a node.
It is written in Java. Script, does not.
MIT licensed. Here is an example on how to use it: var mysql =require('mysql'). Connection({. host : 'localhost'. SELECT 1 + 1 AS solution', function(err, rows, fields) {.
The solution is: ', rows[0]. From this example, you can learn the following: Every method you invoke on a connection is queued and executed in sequence. Closing the connection is done using end() which makes sure all remaining.
Contributors. Thanks goes to the people who have contributed code to this module, see the. Git. Hub Contributors page. Additionally I'd like to thank the following people: Andrey Hristov (Oracle) - for helping me with protocol questions. Ulf Wendel (Oracle) - for helping me with protocol questions. Sponsors. The following companies have supported this project financially, allowing me to. If you are interested in sponsoring a day or more of my time, please.
Community. If you'd like to discuss this module, or ask questions about it, please use one. Establishing connections. The recommended way to establish a connection is this: var mysql =require('mysql'). Connection({. host : 'example. Id). }); However, a connection can also be implicitly established by invoking a query: var mysql =require('mysql').
Connection(..). connection. SELECT 1', function(err, rows) {. Depending on how you like to handle your errors, either method may be. Any type of connection error (handshake or network) is considered.
Error Handling section for more. Connection options. When establishing a connection, you can set the following options: host: The hostname of the database you are connecting to. Default. localhost)port: The port number to connect to. Default: 3. 30. 6)local. Address: The source IP address to use for TCP connection.
Optional)socket. Path: The path to a unix domain socket to connect to. When used host. and port are ignored. The My. SQL user to authenticate as. The password of that My. SQL user. database: Name of the database to use for this connection (Optional). The charset for the connection.
This is called "collation" in the SQL- level. My. SQL (like utf. If a SQL- level charset is specified (like utf. Default: 'UTF8_GENERAL_CI')timezone: The timezone used to store local dates.
Default: 'local')connect. Timeout: The milliseconds before a timeout occurs during the initial connection. My. SQL server. (Default: 1. Objects: Stringify objects instead of converting to values.
See. issue #5. 01. Default: 'false')insecure. Auth: Allow connecting to My. SQL instances that ask for the old. Default: false)type. Cast: Determines if column values should be converted to native. Java. Script types.
Default: true)query. Format: A custom query format function. See Custom format.
Big. Numbers: When dealing with big numbers (BIGINT and DECIMAL columns) in the database. Default: false). big.
Number. Strings: Enabling both support. Big. Numbers and big. Number. Strings forces big numbers.
BIGINT and DECIMAL columns) to be always returned as Java. Script String objects (Default: false). Enabling support. Big. Numbers but leaving big. Number. Strings disabled will return big numbers as String. Java. Script Number objects. Number objects. This option is ignored if support.
Big. Numbers is disabled. Strings: Force date types (TIMESTAMP, DATETIME, DATE) to be returned as strings rather then.
Java. Script Date objects. Default: false)debug: Prints protocol details to stdout. Default: false)trace: Generates stack traces on Error to include call site of library. Slight performance penalty for most calls. Default: true)multiple. Statements: Allow multiple mysql statements per query.
Be careful. with this, it could increase the scope of SQL injection attacks. Default: false)flags: List of connection flags to use other than the default ones. It is. also possible to blacklist default ones. For more information, check.
Connection Flags. See SSL options. In addition to passing these options as an object, you can also use a url.
For example: var connection =mysql. Connection('mysql: //user: pass@host/db? BIG5_CHINESE_CI& timezone=- 0. Note: The query values are first attempted to be parsed as JSON, and if that. SSL options. The ssl option in the connection options takes a string or an object. When given a string. SSL profiles included.
The following profiles are included: When connecting to other servers, you will need to provide an object of options, in the. Credentials. Please note the arguments expect a string of the certificate, not a file name to the. Here is a simple example: var connection =mysql. Connection({. host : 'localhost'. File. Sync(__dirname+'/mysql- ca. You can also connect to a My. SQL server without properly providing the appropriate.
CA to trust. You should not do this. Connection({. host : 'localhost'. DO NOT DO THIS// set up your ca correctly to trust the connection. Unauthorized: false. Terminating connections. There are two ways to end a connection. Terminating a connection gracefully is.
The connection is terminated now. This will make sure all previously enqueued queries are still before sending a. COM_QUIT packet to the My.
SQL server. If a fatal error occurs before the. COM_QUIT packet can be sent, an err argument will be provided to the. An alternative way to end the connection is to call the destroy() method. This will cause an immediate termination of the underlying socket. Additionally destroy() guarantees that no more events or callbacks will be. Unlike end() the destroy() method does not take a callback argument.
Pooling connections. Use pool directly. Pool({. connection. Limit : 1. 0. host : 'example.
SELECT 1 + 1 AS solution', function(err, rows, fields) {. The solution is: ', rows[0]. Connections can be pooled to ease sharing a single connection, or managing.
Pool({. host : 'example. Connection(function(err, connection) {. When you are done with a connection, just call connection. Pool(..). pool. get. Connection(function(err, connection) {. Use the connectionconnection. SELECT something FROM sometable', function(err, rows) {.
And done with the connection. Don't use the connection here, it has been returned to the pool.
If you would like to close the connection and remove it from the pool, use. The pool will create a new connection the next. Connections are lazily created by the pool. If you configure the pool to allow.
Connections are also cycled round- robin style, with connections. When a previous connection is retrieved from the pool, a ping packet is sent. Pool options. Pools accept all the same options as a connection. When creating a new connection, the options are simply passed to the connection. In addition to those options pools accept a few extras: acquire. Timeout: The milliseconds before a timeout occurs during the connection. This is slightly different from connect.
Timeout, because acquiring. Default: 1. 00. 00)wait. For. Connections: Determines the pool's action when no connections are. If true, the pool will queue the. If false, the. pool will immediately call back with an error.
Default: true)connection. Limit: The maximum number of connections to create at once. Default: 1. 0)queue. Limit: The maximum number of connection requests the pool will queue. Connection. If set to 0, there is no.
Default: 0)Pool eventsconnection. The pool will emit a connection event when a new connection is made within the pool. If you need to set session variables on the connection before it gets used, you can. SET SESSION auto_increment_increment=1').
The pool will emit an enqueue event when a callback has been queued to wait for. Waiting for available connection slot').
Closing all the connections in a pool. When you are done using the pool, you have to end all the connections or the. Node. js event loop will stay active until the connections are closed by the. My. SQL server. This is typically done if the pool is used in a script or when. To end all the connections in the. The end method takes an optional callback that you can use to know once. The connections end gracefully, so all.
Once pool. end() has been called, pool. Connection and other operations. Pool. Cluster. Pool. Cluster provides multiple hosts connection. Cluster =mysql. create.
Pool. Cluster(). // add configurations (the config is a pool config object)pool. Cluster. add(config); // add configuration with automatic namepool. Cluster. add('MASTER', master. Config); // add a named configurationpool.
Cluster. add('SLAVE1', slave. Config). pool. Cluster.
SLAVE2', slave. 2Config). Cluster. remove('SLAVE2'); // By node. Idpool. Cluster. remove('SLAVE*'); // By target group : SLAVE1- 2// Target Group : ALL(anonymous, MASTER, SLAVE1- 2), Selector : round- robin(default)pool. Cluster. get. Connection(function (err, connection) {}). Target Group : MASTER, Selector : round- robinpool. Cluster. get. Connection('MASTER', function (err, connection) {}). Target Group : SLAVE1- 2, Selector : order// If can't connect to SLAVE1, return SLAVE2.
SLAVE1 in the cluster)pool. Cluster. on('remove', function (node. Id) {. console. log('REMOVED NODE : '+ node. Id); // node. Id = SLAVE1. Cluster. get. Connection('SLAVE*', 'ORDER', function (err, connection) {}).
Cluster. of('*'). Connection(function (err, connection) {}). Cluster. of('SLAVE*', 'RANDOM'). Connection(function (err, connection) {}). Connection(function (err, connection) {}). Cluster. end(function (err) {. Pool. Cluster optionscan.
Retry: If true, Pool. Cluster will attempt to reconnect when connection fails. Default: true)remove. Node. Error. Count: If connection fails, node's error. Count increases. When error.
Count is greater than remove. Node. Error. Count, remove a node in the Pool. Cluster. (Default: 5)restore. Node. Timeout: If connection fails, specifies the number of milliseconds. If set to 0, then node will be. Default: 0)default.