mysql

package module
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 Go to latest Published: Mar 13, 2021 License: MPL-2.0 Imports: 47 Imported by: 0

README

Go-MySQL-Driver

A MySQL-Driver for Go's database/sql package

Go-MySQL-Driver logo

Features

  • Lightweight and fast
  • Native Go implementation. No C-bindings, just pure Go
  • Connections over TCP/IPv4, TCP/IPv6, Unix domain sockets or custom protocols
  • Automatic handling of broken connections
  • Automatic Connection Pooling (by database/sql package)
  • Supports queries larger than 16MB
  • Full sql.RawBytes support.
  • Intelligent LONG DATA handling in prepared statements
  • Secure LOAD DATA LOCAL INFILE support with file allowlisting and io.Reader support
  • Optional time.Time parsing
  • Optional placeholder interpolation

Requirements

  • Go 1.10 or higher. We aim to support the 3 latest versions of Go.
  • MySQL (4.1+), MariaDB, Percona Server, Google CloudSQL or Sphinx (2.2.3+)

Installation

Simple install the package to your $GOPATH with the go tool from shell:

$ go get -u github.com/go-sql-driver/mysql

Make sure Git is installed on your machine and in your system's PATH.

Usage

Go MySQL Driver is an implementation of Go's database/sql/driver interface. You only need to import the driver and can use the full database/sql API then.

Use mysql as driverName and a valid DSN as dataSourceName:

import (
	"database/sql"
	"time"

	_ "github.com/go-sql-driver/mysql"
)

// ...

db, err := sql.Open("mysql", "user:password@/dbname")
if err != nil {
	panic(err)
}
// See "Important settings" section.
db.SetConnMaxLifetime(time.Minute * 3)
db.SetMaxOpenConns(10)
db.SetMaxIdleConns(10)

Examples are available in our Wiki.

Important settings

db.SetConnMaxLifetime() is required to ensure connections are closed by the driver safely before connection is closed by MySQL server, OS, or other middlewares. Since some middlewares close idle connections by 5 minutes, we recommend timeout shorter than 5 minutes. This setting helps load balancing and changing system variables too.

db.SetMaxOpenConns() is highly recommended to limit the number of connection used by the application. There is no recommended limit number because it depends on application and MySQL server.

db.SetMaxIdleConns() is recommended to be set same to (or greater than) db.SetMaxOpenConns(). When it is smaller than SetMaxOpenConns(), connections can be opened and closed very frequently than you expect. Idle connections can be closed by the db.SetConnMaxLifetime(). If you want to close idle connections more rapidly, you can use db.SetConnMaxIdleTime() since Go 1.15.

DSN (Data Source Name)

The Data Source Name has a common format, like e.g. PEAR DB uses it, but without type-prefix (optional parts marked by squared brackets):

[username[:password]@][protocol[(address)]]/dbname[?param1=value1&...&paramN=valueN]

A DSN in its fullest form:

username:password@protocol(address)/dbname?param=value

Except for the databasename, all values are optional. So the minimal DSN is:

/dbname

If you do not want to preselect a database, leave dbname empty:

/

This has the same effect as an empty DSN string:

Alternatively, Config.FormatDSN can be used to create a DSN string by filling a struct.

Password

Passwords can consist of any character. Escaping is not necessary.

Protocol

See net.Dial for more information which networks are available. In general you should use an Unix domain socket if available and TCP otherwise for best performance.

Address

For TCP and UDP networks, addresses have the form host[:port]. If port is omitted, the default port will be used. If host is a literal IPv6 address, it must be enclosed in square brackets. The functions net.JoinHostPort and net.SplitHostPort manipulate addresses in this form.

For Unix domain sockets the address is the absolute path to the MySQL-Server-socket, e.g. /var/run/mysqld/mysqld.sock or /tmp/mysql.sock.

Parameters

Parameters are case-sensitive!

Notice that any of true, TRUE, True or 1 is accepted to stand for a true boolean value. Not surprisingly, false can be specified as any of: false, FALSE, False or 0.

allowAllFiles
Type:           bool
Valid Values:   true, false
Default:        false

allowAllFiles=true disables the file allowlist for LOAD DATA LOCAL INFILE and allows all files. Might be insecure!

allowCleartextPasswords
Type:           bool
Valid Values:   true, false
Default:        false

allowCleartextPasswords=true allows using the cleartext client side plugin if required by an account, such as one defined with the PAM authentication plugin. Sending passwords in clear text may be a security problem in some configurations. To avoid problems if there is any possibility that the password would be intercepted, clients should connect to MySQL Server using a method that protects the password. Possibilities include TLS / SSL, IPsec, or a private network.

allowNativePasswords
Type:           bool
Valid Values:   true, false
Default:        true

allowNativePasswords=false disallows the usage of MySQL native password method.

allowOldPasswords
Type:           bool
Valid Values:   true, false
Default:        false

allowOldPasswords=true allows the usage of the insecure old password method. This should be avoided, but is necessary in some cases. See also the old_passwords wiki page.

charset
Type:           string
Valid Values:   <name>
Default:        none

Sets the charset used for client-server interaction ("SET NAMES <value>"). If multiple charsets are set (separated by a comma), the following charset is used if setting the charset failes. This enables for example support for utf8mb4 (introduced in MySQL 5.5.3) with fallback to utf8 for older servers (charset=utf8mb4,utf8).

Usage of the charset parameter is discouraged because it issues additional queries to the server. Unless you need the fallback behavior, please use collation instead.

checkConnLiveness
Type:           bool
Valid Values:   true, false
Default:        true

On supported platforms connections retrieved from the connection pool are checked for liveness before using them. If the check fails, the respective connection is marked as bad and the query retried with another connection. checkConnLiveness=false disables this liveness check of connections.

collation
Type:           string
Valid Values:   <name>
Default:        utf8mb4_general_ci

Sets the collation used for client-server interaction on connection. In contrast to charset, collation does not issue additional queries. If the specified collation is unavailable on the target server, the connection will fail.

A list of valid charsets for a server is retrievable with SHOW COLLATION.

The default collation (utf8mb4_general_ci) is supported from MySQL 5.5. You should use an older collation (e.g. utf8_general_ci) for older MySQL.

Collations for charset "ucs2", "utf16", "utf16le", and "utf32" can not be used (ref).

clientFoundRows
Type:           bool
Valid Values:   true, false
Default:        false

clientFoundRows=true causes an UPDATE to return the number of matching rows instead of the number of rows changed.

columnsWithAlias
Type:           bool
Valid Values:   true, false
Default:        false

When columnsWithAlias is true, calls to sql.Rows.Columns() will return the table alias and the column name separated by a dot. For example:

SELECT u.id FROM users as u

will return u.id instead of just id if columnsWithAlias=true.

interpolateParams
Type:           bool
Valid Values:   true, false
Default:        false

If interpolateParams is true, placeholders (?) in calls to db.Query() and db.Exec() are interpolated into a single query string with given parameters. This reduces the number of roundtrips, since the driver has to prepare a statement, execute it with given parameters and close the statement again with interpolateParams=false.

This can not be used together with the multibyte encodings BIG5, CP932, GB2312, GBK or SJIS. These are rejected as they may introduce a SQL injection vulnerability!

loc
Type:           string
Valid Values:   <escaped name>
Default:        UTC

Sets the location for time.Time values (when using parseTime=true). "Local" sets the system's location. See time.LoadLocation for details.

Note that this sets the location for time.Time values but does not change MySQL's time_zone setting. For that see the time_zone system variable, which can also be set as a DSN parameter.

Please keep in mind, that param values must be url.QueryEscape'ed. Alternatively you can manually replace the / with %2F. For example US/Pacific would be loc=US%2FPacific.

maxAllowedPacket
Type:          decimal number
Default:       4194304

Max packet size allowed in bytes. The default value is 4 MiB and should be adjusted to match the server settings. maxAllowedPacket=0 can be used to automatically fetch the max_allowed_packet variable from server on every connection.

multiStatements
Type:           bool
Valid Values:   true, false
Default:        false

Allow multiple statements in one query. While this allows batch queries, it also greatly increases the risk of SQL injections. Only the result of the first query is returned, all other results are silently discarded.

When multiStatements is used, ? parameters must only be used in the first statement.

parseTime
Type:           bool
Valid Values:   true, false
Default:        false

parseTime=true changes the output type of DATE and DATETIME values to time.Time instead of []byte / string The date or datetime like 0000-00-00 00:00:00 is converted into zero value of time.Time.

readTimeout
Type:           duration
Default:        0

I/O read timeout. The value must be a decimal number with a unit suffix ("ms", "s", "m", "h"), such as "30s", "0.5m" or "1m30s".

rejectReadOnly
Type:           bool
Valid Values:   true, false
Default:        false

rejectReadOnly=true causes the driver to reject read-only connections. This is for a possible race condition during an automatic failover, where the mysql client gets connected to a read-only replica after the failover.

Note that this should be a fairly rare case, as an automatic failover normally happens when the primary is down, and the race condition shouldn't happen unless it comes back up online as soon as the failover is kicked off. On the other hand, when this happens, a MySQL application can get stuck on a read-only connection until restarted. It is however fairly easy to reproduce, for example, using a manual failover on AWS Aurora's MySQL-compatible cluster.

If you are not relying on read-only transactions to reject writes that aren't supposed to happen, setting this on some MySQL providers (such as AWS Aurora) is safer for failovers.

Note that ERROR 1290 can be returned for a read-only server and this option will cause a retry for that error. However the same error number is used for some other cases. You should ensure your application will never cause an ERROR 1290 except for read-only mode when enabling this option.

serverPubKey
Type:           string
Valid Values:   <name>
Default:        none

Server public keys can be registered with mysql.RegisterServerPubKey, which can then be used by the assigned name in the DSN. Public keys are used to transmit encrypted data, e.g. for authentication. If the server's public key is known, it should be set manually to avoid expensive and potentially insecure transmissions of the public key from the server to the client each time it is required.

timeout
Type:           duration
Default:        OS default

Timeout for establishing connections, aka dial timeout. The value must be a decimal number with a unit suffix ("ms", "s", "m", "h"), such as "30s", "0.5m" or "1m30s".

tls
Type:           bool / string
Valid Values:   true, false, skip-verify, preferred, <name>
Default:        false

tls=true enables TLS / SSL encrypted connection to the server. Use skip-verify if you want to use a self-signed or invalid certificate (server side) or use preferred to use TLS only when advertised by the server. This is similar to skip-verify, but additionally allows a fallback to a connection which is not encrypted. Neither skip-verify nor preferred add any reliable security. You can use a custom TLS config after registering it with mysql.RegisterTLSConfig.

writeTimeout
Type:           duration
Default:        0

I/O write timeout. The value must be a decimal number with a unit suffix ("ms", "s", "m", "h"), such as "30s", "0.5m" or "1m30s".

System Variables

Any other parameters are interpreted as system variables:

  • <boolean_var>=<value>: SET <boolean_var>=<value>
  • <enum_var>=<value>: SET <enum_var>=<value>
  • <string_var>=%27<value>%27: SET <string_var>='<value>'

Rules:

  • The values for string variables must be quoted with '.
  • The values must also be url.QueryEscape'ed! (which implies values of string variables must be wrapped with %27).

Examples:

Examples
user@unix(/path/to/socket)/dbname

root:pw@unix(/tmp/mysql.sock)/myDatabase?loc=Local

user:password@tcp(localhost:5555)/dbname?tls=skip-verify&autocommit=true

Treat warnings as errors by setting the system variable sql_mode:

user:password@/dbname?sql_mode=TRADITIONAL

TCP via IPv6:

user:password@tcp([de:ad:be:ef::ca:fe]:80)/dbname?timeout=90s&collation=utf8mb4_unicode_ci

TCP on a remote host, e.g. Amazon RDS:

id:password@tcp(your-amazonaws-uri.com:3306)/dbname

Google Cloud SQL on App Engine:

user:password@unix(/cloudsql/project-id:region-name:instance-name)/dbname

TCP using default port (3306) on localhost:

user:password@tcp/dbname?charset=utf8mb4,utf8&sys_var=esc%40ped

Use the default protocol (tcp) and host (localhost:3306):

user:password@/dbname

No Database preselected:

user:password@/
Connection pool and timeouts

The connection pool is managed by Go's database/sql package. For details on how to configure the size of the pool and how long connections stay in the pool see *DB.SetMaxOpenConns, *DB.SetMaxIdleConns, and *DB.SetConnMaxLifetime in the database/sql documentation. The read, write, and dial timeouts for each individual connection are configured with the DSN parameters readTimeout, writeTimeout, and timeout, respectively.

ColumnType Support

This driver supports the ColumnType interface introduced in Go 1.8, with the exception of ColumnType.Length(), which is currently not supported.

context.Context Support

Go 1.8 added database/sql support for context.Context. This driver supports query timeouts and cancellation via contexts. See context support in the database/sql package for more details.

LOAD DATA LOCAL INFILE support

For this feature you need direct access to the package. Therefore you must change the import path (no _):

import "github.com/go-sql-driver/mysql"

Files must be explicitly allowed by registering them with mysql.RegisterLocalFile(filepath) (recommended) or the allowlist check must be deactivated by using the DSN parameter allowAllFiles=true (Might be insecure!).

To use a io.Reader a handler function must be registered with mysql.RegisterReaderHandler(name, handler) which returns a io.Reader or io.ReadCloser. The Reader is available with the filepath Reader::<name> then. Choose different names for different handlers and DeregisterReaderHandler when you don't need it anymore.

See the godoc of Go-MySQL-Driver for details.

time.Time support

The default internal output type of MySQL DATE and DATETIME values is []byte which allows you to scan the value into a []byte, string or sql.RawBytes variable in your program.

However, many want to scan MySQL DATE and DATETIME values into time.Time variables, which is the logical equivalent in Go to DATE and DATETIME in MySQL. You can do that by changing the internal output type from []byte to time.Time with the DSN parameter parseTime=true. You can set the default time.Time location with the loc DSN parameter.

Caution: As of Go 1.1, this makes time.Time the only variable type you can scan DATE and DATETIME values into. This breaks for example sql.RawBytes support.

Unicode support

Since version 1.5 Go-MySQL-Driver automatically uses the collation utf8mb4_general_ci by default.

Other collations / charsets can be set using the collation DSN parameter.

Version 1.0 of the driver recommended adding &charset=utf8 (alias for SET NAMES utf8) to the DSN to enable proper UTF-8 support. This is not necessary anymore. The collation parameter should be preferred to set another collation / charset than the default.

See http://dev.mysql.com/doc/refman/8.0/en/charset-unicode.html for more details on MySQL's Unicode support.

Testing / Development

To run the driver tests you may need to adjust the configuration. See the Testing Wiki-Page for details.

Go-MySQL-Driver is not feature-complete yet. Your help is very appreciated. If you want to contribute, you can work on an open issue or review a pull request.

See the Contribution Guidelines for details.

License

Go-MySQL-Driver is licensed under the Mozilla Public License Version 2.0

Mozilla summarizes the license scope as follows:

MPL: The copyleft applies to any files containing MPLed code.

That means:

  • You can use the unchanged source code both in private and commercially.
  • When distributing, you must publish the source code of any changed files licensed under the MPL 2.0 under a) the MPL 2.0 itself or b) a compatible license (e.g. GPL 3.0 or Apache License 2.0).
  • You needn't publish the source code of your library as long as the files licensed under the MPL 2.0 are unchanged.

Please read the MPL 2.0 FAQ if you have further questions regarding the license.

You can read the full terms here: LICENSE.

Go Gopher and MySQL Dolphin

Documentation

Overview

Package mysql provides a MySQL driver for Go's database/sql package.

The driver should be used via the database/sql package: 

import "database/sql"
import _ "github.com/go-sql-driver/mysql"

db, err := sql.Open("mysql", "user:password@/dbname")

See https://github.com/go-sql-driver/mysql#usage for details

Index

Constants

View Source 
const (
	InsertSqlTemplate = "INSERT INTO %s (%s) VALUES (%s)"
	DeleteSqlTemplate = "DELETE FROM %s WHERE `%s` = ?"
	UpdateSqlTemplate = "UPDATE %s SET %s WHERE `%s` = ?"
	SelectSqlTemplate = "SELECT %s FROM %s WHERE `%s` IN %s"
)
View Source 
const (
	DeleteUndoLogSql         = "DELETE FROM undo_log WHERE xid = ? and branch_id = ?"
	DeleteUndoLogByCreateSql = "DELETE FROM undo_log WHERE log_created <= ? LIMIT ?"
	InsertUndoLogSql         = `` /* 140-byte string literal not displayed */

	SelectUndoLogSql = `SELECT branch_id, xid, context, rollback_info, log_status FROM undo_log 
        WHERE xid = ? AND branch_id = ? FOR UPDATE`
)
View Source 
const (
	BIT SqlDataType = -7

	TINYINT = -6

	SMALLINT = 5

	INTEGER = 4

	BIGINT = -5

	FLOAT = 6

	REAL = 7

	DOUBLE = 8

	NUMERIC = 2

	DECIMAL = 3

	CHAR = 1

	VARCHAR = 12

	LONGVARCHAR = -1

	DATE = 91

	TIME = 92

	TIMESTAMP = 93

	BINARY = -2

	VARBINARY = -3

	LONGVARBINARY = -4

	NULL = 0

	OTHER = 1111

	JAVA_OBJECT = 2000

	DISTINCT = 2001

	STRUCT = 2002

	ARRAY = 2003

	BLOB = 2004

	CLOB = 2005

	REF = 2006

	DATALINK = 70

	BOOLEAN = 16

	ROWID = -8

	NCHAR = -15

	NVARCHAR = -9

	LONGNVARCHAR = -16

	NCLOB = 2011

	SQLXML = 2009

	REF_CURSOR = 2012

	TIME_WITH_TIMEZONE = 2013

	TIMESTAMP_WITH_TIMEZONE = 2014
)
View Source 
const XID = "XID"

Variables

View Source 
var (
	ErrInvalidConn       = errors.New("invalid connection")
	ErrMalformPkt        = errors.New("malformed packet")
	ErrNoTLS             = errors.New("TLS requested but server does not support TLS")
	ErrCleartextPassword = errors.New("this user requires clear text authentication. If you still want to use it, please add 'allowCleartextPasswords=1' to your DSN")
	ErrNativePassword    = errors.New("this user requires mysql native password authentication.")
	ErrOldPassword       = errors.New("this user requires old password authentication. If you still want to use it, please add 'allowOldPasswords=1' to your DSN. See also https://github.com/go-sql-driver/mysql/wiki/old_passwords")
	ErrUnknownPlugin     = errors.New("this authentication plugin is not supported")
	ErrOldProtocol       = errors.New("MySQL server does not support required protocol 41+")
	ErrPktSync           = errors.New("commands out of sync. You can't run this command now")
	ErrPktSyncMul        = errors.New("commands out of sync. Did you run multiple statements at once?")
	ErrPktTooLarge       = errors.New("packet for query is too large. Try adjusting the 'max_allowed_packet' variable on the server")
	ErrBusyBuffer        = errors.New("busy buffer")
)

Various errors the driver might return. Can change between driver versions.

View Source 
var (
	DBKEYS_SPLIT_CHAR = ","
)
View Source 
var EXPIRE_TIME = 15 * time.Minute
View Source 
var MySQLKeyword = map[string]string{}/* 263 elements not displayed */
View Source 
var SqlDataTypes = map[string]int32{
	"BIT":                     -7,
	"TINYINT":                 -6,
	"SMALLINT":                5,
	"INTEGER":                 4,
	"BIGINT":                  -5,
	"FLOAT":                   6,
	"REAL":                    7,
	"DOUBLE":                  8,
	"NUMERIC":                 2,
	"DECIMAL":                 3,
	"CHAR":                    1,
	"VARCHAR":                 12,
	"LONGVARCHAR":             -1,
	"DATE":                    91,
	"TIME":                    92,
	"TIMESTAMP":               93,
	"BINARY":                  -2,
	"VARBINARY":               -3,
	"LONGVARBINARY":           -4,
	"NULL":                    0,
	"OTHER":                   1111,
	"JAVA_OBJECT":             2000,
	"DISTINCT":                2001,
	"STRUCT":                  2002,
	"ARRAY":                   2003,
	"BLOB":                    2004,
	"CLOB":                    2005,
	"REF":                     2006,
	"DATALINK":                70,
	"BOOLEAN":                 16,
	"ROWID":                   -8,
	"NCHAR":                   -15,
	"NVARCHAR":                -9,
	"LONGNVARCHAR":            -16,
	"NCLOB":                   2011,
	"SQLXML":                  2009,
	"REF_CURSOR":              2012,
	"TIME_WITH_TIMEZONE":      2013,
	"TIMESTAMP_WITH_TIMEZONE": 2014,
}

Functions

func Check 

func Check(fieldOrTableName string) bool

func CheckAndReplace 

func CheckAndReplace(fieldOrTableName string) string

func CheckEscape 

func CheckEscape(fieldOrTableName string) bool

func DeleteBuildUndoSql 

func DeleteBuildUndoSql(undoLog sqlUndoLog) string

func DeregisterLocalFile 

func DeregisterLocalFile(filePath string)

DeregisterLocalFile removes the given filepath from the allowlist.

func DeregisterReaderHandler 

func DeregisterReaderHandler(name string)

DeregisterReaderHandler removes the ReaderHandler function with the given name from the registry.

func DeregisterServerPubKey 

func DeregisterServerPubKey(name string)

DeregisterServerPubKey removes the public key registered with the given name.

func DeregisterTLSConfig 

func DeregisterTLSConfig(key string)

DeregisterTLSConfig removes the tls.Config associated with key.

func GetColumns 

func GetColumns(conn *mysqlConn, dbName, tableName string) ([]schema.ColumnMeta, error)

func GetIndexes 

func GetIndexes(conn *mysqlConn, dbName, tableName string) ([]schema.IndexMeta, error)

func GetSqlDataType 

func GetSqlDataType(dataType string) int32

func InitDataResourceManager 

func InitDataResourceManager()

func InitTableMetaCache added in v0.1.2 

func InitTableMetaCache(dbName string)

func InsertBuildUndoSql 

func InsertBuildUndoSql(undoLog sqlUndoLog) string

func NewConnector 

func NewConnector(cfg *Config) (driver.Connector, error)

NewConnector returns new driver.Connector.

func RegisterDial deprecated 

func RegisterDial(network string, dial DialFunc)

RegisterDial registers a custom dial function. It can then be used by the network address mynet(addr), where mynet is the registered new network. addr is passed as a parameter to the dial function.

Deprecated: users should call RegisterDialContext instead

func RegisterDialContext 

func RegisterDialContext(net string, dial DialContextFunc)

RegisterDialContext registers a custom dial function. It can then be used by the network address mynet(addr), where mynet is the registered new network. The current context for the connection and its address is passed to the dial function.

func RegisterLocalFile 

func RegisterLocalFile(filePath string)

RegisterLocalFile adds the given file to the file allowlist, so that it can be used by "LOAD DATA LOCAL INFILE <filepath>". Alternatively you can allow the use of all local files with the DSN parameter 'allowAllFiles=true' 

filePath := "/home/gopher/data.csv"
mysql.RegisterLocalFile(filePath)
err := db.Exec("LOAD DATA LOCAL INFILE '" + filePath + "' INTO TABLE foo")
if err != nil {
...

func RegisterReaderHandler 

func RegisterReaderHandler(name string, handler func() io.Reader)

RegisterReaderHandler registers a handler function which is used to receive a io.Reader. The Reader can be used by "LOAD DATA LOCAL INFILE Reader::<name>". If the handler returns a io.ReadCloser Close() is called when the request is finished. 

mysql.RegisterReaderHandler("data", func() io.Reader {
	var csvReader io.Reader // Some Reader that returns CSV data
	... // Open Reader here
	return csvReader
})
err := db.Exec("LOAD DATA LOCAL INFILE 'Reader::data' INTO TABLE foo")
if err != nil {
...

func RegisterResource added in v0.1.2 

func RegisterResource(dsn string)

func RegisterServerPubKey 

func RegisterServerPubKey(name string, pubKey *rsa.PublicKey)

RegisterServerPubKey registers a server RSA public key which can be used to send data in a secure manner to the server without receiving the public key in a potentially insecure way from the server first. Registered keys can afterwards be used adding serverPubKey=<name> to the DSN.

Note: The provided rsa.PublicKey instance is exclusively owned by the driver after registering it and may not be modified. 

data, err := ioutil.ReadFile("mykey.pem")
if err != nil {
	log.Fatal(err)
}

block, _ := pem.Decode(data)
if block == nil || block.Type != "PUBLIC KEY" {
	log.Fatal("failed to decode PEM block containing public key")
}

pub, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
	log.Fatal(err)
}

if rsaPubKey, ok := pub.(*rsa.PublicKey); ok {
	mysql.RegisterServerPubKey("mykey", rsaPubKey)
} else {
	log.Fatal("not a RSA public key")
}

func RegisterTLSConfig 

func RegisterTLSConfig(key string, config *tls.Config) error

RegisterTLSConfig registers a custom tls.Config to be used with sql.Open. Use the key as a value in the DSN where tls=value.

Note: The provided tls.Config is exclusively owned by the driver after registering it. 

rootCertPool := x509.NewCertPool()
pem, err := ioutil.ReadFile("/path/ca-cert.pem")
if err != nil {
    log.Fatal(err)
}
if ok := rootCertPool.AppendCertsFromPEM(pem); !ok {
    log.Fatal("Failed to append PEM.")
}
clientCert := make([]tls.Certificate, 0, 1)
certs, err := tls.LoadX509KeyPair("/path/client-cert.pem", "/path/client-key.pem")
if err != nil {
    log.Fatal(err)
}
clientCert = append(clientCert, certs)
mysql.RegisterTLSConfig("custom", &tls.Config{
    RootCAs: rootCertPool,
    Certificates: clientCert,
})
db, err := sql.Open("mysql", "user@tcp(localhost:3306)/test?tls=custom")

func SetLogger 

func SetLogger(logger Logger) error

SetLogger is used to set the logger for critical errors. The initial logger is os.Stderr.

func UpdateBuildUndoSql 

func UpdateBuildUndoSql(undoLog sqlUndoLog) string

Types

type BuildUndoSql 

type BuildUndoSql func(undoLog sqlUndoLog) string

type Config 

type Config struct {
	User             string            // Username
	Passwd           string            // Password (requires User)
	Net              string            // Network type
	Addr             string            // Network address (requires Net)
	DBName           string            // Database name
	Params           map[string]string // Connection parameters
	Collation        string            // Connection collation
	Loc              *time.Location    // Location for time.Time values
	MaxAllowedPacket int               // Max packet size allowed
	ServerPubKey     string            // Server public key name

	TLSConfig string // TLS configuration name

	Timeout      time.Duration // Dial timeout
	ReadTimeout  time.Duration // I/O read timeout
	WriteTimeout time.Duration // I/O write timeout

	AllowAllFiles           bool // Allow all files to be used with LOAD DATA LOCAL INFILE
	AllowCleartextPasswords bool // Allows the cleartext client side plugin
	AllowNativePasswords    bool // Allows the native password authentication method
	AllowOldPasswords       bool // Allows the old insecure password method
	CheckConnLiveness       bool // Check connections for liveness before using them
	ClientFoundRows         bool // Return number of matching rows instead of rows changed
	ColumnsWithAlias        bool // Prepend table alias to column names
	InterpolateParams       bool // Interpolate placeholders into query string
	MultiStatements         bool // Allow multiple statements in one query
	ParseTime               bool // Parse time values to time.Time
	RejectReadOnly          bool // Reject read-only connections
	// contains filtered or unexported fields
}

Config is a configuration parsed from a DSN string. If a new Config is created instead of being parsed from a DSN string, the NewConfig function should be used, which sets default values.

func NewConfig 

func NewConfig() *Config

NewConfig creates a new Config and sets default values.

func ParseDSN 

func ParseDSN(dsn string) (cfg *Config, err error)

ParseDSN parses the DSN string to a Config

func (*Config) Clone 

func (cfg *Config) Clone() *Config

func (*Config) FormatDSN 

func (cfg *Config) FormatDSN() string

FormatDSN formats the given Config into a DSN string which can be passed to the driver.

type DataSourceManager 

type DataSourceManager struct {
	RpcClient     *rpc_client.RpcRemoteClient
	ResourceCache map[string]*connector
}

func (DataSourceManager) BranchCommit 

func (resourceManager DataSourceManager) BranchCommit(branchType meta.BranchType, xid string, branchID int64,
	resourceID string, applicationData []byte) (meta.BranchStatus, error)

func (DataSourceManager) BranchRollback 

func (resourceManager DataSourceManager) BranchRollback(branchType meta.BranchType, xid string, branchID int64,
	resourceID string, applicationData []byte) (meta.BranchStatus, error)

func (DataSourceManager) GetBranchType 

func (resourceManager DataSourceManager) GetBranchType() meta.BranchType

func (DataSourceManager) LockQuery 

func (resourceManager DataSourceManager) LockQuery(branchType meta.BranchType, resourceID string, xid string,
	lockKeys string) (bool, error)

type DialContextFunc 

type DialContextFunc func(ctx context.Context, addr string) (net.Conn, error)

DialContextFunc is a function which can be used to establish the network connection. Custom dial functions must be registered with RegisterDialContext

type DialFunc deprecated 

type DialFunc func(addr string) (net.Conn, error)

DialFunc is a function which can be used to establish the network connection. Custom dial functions must be registered with RegisterDial

Deprecated: users should register a DialContextFunc instead

type Logger 

type Logger interface {
	Print(v ...interface{})
}

Logger is used to log critical error messages.

type MySQLDriver 

type MySQLDriver struct{}

MySQLDriver is exported to make the driver directly accessible. In general the driver is used via the database/sql package.

func (MySQLDriver) Open 

func (d MySQLDriver) Open(dsn string) (driver.Conn, error)

Open new Connection. See https://github.com/go-sql-driver/mysql#dsn-data-source-name for how the DSN string is formatted

func (MySQLDriver) OpenConnector 

func (d MySQLDriver) OpenConnector(dsn string) (driver.Connector, error)

OpenConnector implements driver.DriverContext.

type MySQLError 

type MySQLError struct {
	Number  uint16
	Message string
}

MySQLError is an error type which represents a single MySQL error

func (*MySQLError) Error 

func (me *MySQLError) Error() string

type MysqlUndoExecutor 

type MysqlUndoExecutor struct {
	// contains filtered or unexported fields
}

func NewMysqlUndoExecutor 

func NewMysqlUndoExecutor(undoLog sqlUndoLog) MysqlUndoExecutor

func (MysqlUndoExecutor) Execute 

func (executor MysqlUndoExecutor) Execute(conn *mysqlConn) error

type MysqlUndoLogManager 

type MysqlUndoLogManager struct {
}

func GetUndoLogManager 

func GetUndoLogManager() MysqlUndoLogManager

func (MysqlUndoLogManager) BatchDeleteUndoLog 

func (manager MysqlUndoLogManager) BatchDeleteUndoLog(conn *mysqlConn, xids []string, branchIDs []int64) error

func (MysqlUndoLogManager) DeleteUndoLog 

func (manager MysqlUndoLogManager) DeleteUndoLog(conn *mysqlConn, xid string, branchID int64) error

func (MysqlUndoLogManager) DeleteUndoLogByLogCreated 

func (manager MysqlUndoLogManager) DeleteUndoLogByLogCreated(conn *mysqlConn, logCreated time.Time, limitRows int) (sql.Result, error)

func (MysqlUndoLogManager) FlushUndoLogs 

func (manager MysqlUndoLogManager) FlushUndoLogs(conn *mysqlConn) error

func (MysqlUndoLogManager) Undo 

func (manager MysqlUndoLogManager) Undo(conn *mysqlConn, xid string, branchID int64, resourceID string) error

type NullTime deprecated 

type NullTime sql.NullTime

NullTime represents a time.Time that may be NULL. NullTime implements the Scanner interface so it can be used as a scan destination: 

var nt NullTime
err := db.QueryRow("SELECT time FROM foo WHERE id=?", id).Scan(&nt)
...
if nt.Valid {
   // use nt.Time
} else {
   // NULL value
}

This NullTime implementation is not driver-specific

Deprecated: NullTime doesn't honor the loc DSN parameter. NullTime.Scan interprets a time as UTC, not the loc DSN parameter. Use sql.NullTime instead.

func (*NullTime) Scan 

func (nt *NullTime) Scan(value interface{}) (err error)

Scan implements the Scanner interface. The value type must be time.Time or string / []byte (formatted time-string), otherwise Scan fails.

func (NullTime) Value 

func (nt NullTime) Value() (driver.Value, error)

Value implements the driver Valuer interface.

type PbBranchUndoLog 

type PbBranchUndoLog struct {
	Xid                  string          `protobuf:"bytes,1,opt,name=XID,proto3" json:"XID,omitempty"`
	BranchID             int64           `protobuf:"varint,2,opt,name=BranchID,proto3" json:"BranchID,omitempty"`
	SqlUndoLogs          []*PbSqlUndoLog `protobuf:"bytes,3,rep,name=SqlUndoLogs,proto3" json:"SqlUndoLogs,omitempty"`
	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
	XXX_unrecognized     []byte          `json:"-"`
	XXX_sizecache        int32           `json:"-"`
}

func (*PbBranchUndoLog) Descriptor 

func (*PbBranchUndoLog) Descriptor() ([]byte, []int)

func (*PbBranchUndoLog) GetBranchID 

func (m *PbBranchUndoLog) GetBranchID() int64

func (*PbBranchUndoLog) GetSqlUndoLogs 

func (m *PbBranchUndoLog) GetSqlUndoLogs() []*PbSqlUndoLog

func (*PbBranchUndoLog) GetXid 

func (m *PbBranchUndoLog) GetXid() string

func (*PbBranchUndoLog) ProtoMessage 

func (*PbBranchUndoLog) ProtoMessage()

func (*PbBranchUndoLog) Reset 

func (m *PbBranchUndoLog) Reset()

func (*PbBranchUndoLog) String 

func (m *PbBranchUndoLog) String() string

func (*PbBranchUndoLog) XXX_DiscardUnknown 

func (m *PbBranchUndoLog) XXX_DiscardUnknown()

func (*PbBranchUndoLog) XXX_Marshal 

func (m *PbBranchUndoLog) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*PbBranchUndoLog) XXX_Merge 

func (m *PbBranchUndoLog) XXX_Merge(src proto.Message)

func (*PbBranchUndoLog) XXX_Size 

func (m *PbBranchUndoLog) XXX_Size() int

func (*PbBranchUndoLog) XXX_Unmarshal 

func (m *PbBranchUndoLog) XXX_Unmarshal(b []byte) error

type PbField 

type PbField struct {
	Name                 string   `protobuf:"bytes,1,opt,name=Name,proto3" json:"Name,omitempty"`
	KeyType              int32    `protobuf:"varint,2,opt,name=KeyType,proto3" json:"KeyType,omitempty"`
	Type                 int32    `protobuf:"zigzag32,3,opt,name=Type,proto3" json:"Type,omitempty"`
	Value                []byte   `protobuf:"bytes,4,opt,name=Value,proto3" json:"Value,omitempty"`
	XXX_NoUnkeyedLiteral struct{} `json:"-"`
	XXX_unrecognized     []byte   `json:"-"`
	XXX_sizecache        int32    `json:"-"`
}

func (*PbField) Descriptor 

func (*PbField) Descriptor() ([]byte, []int)

func (*PbField) GetKeyType 

func (m *PbField) GetKeyType() int32

func (*PbField) GetName 

func (m *PbField) GetName() string

func (*PbField) GetType 

func (m *PbField) GetType() int32

func (*PbField) GetValue 

func (m *PbField) GetValue() []byte

func (*PbField) ProtoMessage 

func (*PbField) ProtoMessage()

func (*PbField) Reset 

func (m *PbField) Reset()

func (*PbField) String 

func (m *PbField) String() string

func (*PbField) XXX_DiscardUnknown 

func (m *PbField) XXX_DiscardUnknown()

func (*PbField) XXX_Marshal 

func (m *PbField) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*PbField) XXX_Merge 

func (m *PbField) XXX_Merge(src proto.Message)

func (*PbField) XXX_Size 

func (m *PbField) XXX_Size() int

func (*PbField) XXX_Unmarshal 

func (m *PbField) XXX_Unmarshal(b []byte) error

type PbRow 

type PbRow struct {
	Fields               []*PbField `protobuf:"bytes,1,rep,name=Fields,proto3" json:"Fields,omitempty"`
	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
	XXX_unrecognized     []byte     `json:"-"`
	XXX_sizecache        int32      `json:"-"`
}

func (*PbRow) Descriptor 

func (*PbRow) Descriptor() ([]byte, []int)

func (*PbRow) GetFields 

func (m *PbRow) GetFields() []*PbField

func (*PbRow) ProtoMessage 

func (*PbRow) ProtoMessage()

func (*PbRow) Reset 

func (m *PbRow) Reset()

func (*PbRow) String 

func (m *PbRow) String() string

func (*PbRow) XXX_DiscardUnknown 

func (m *PbRow) XXX_DiscardUnknown()

func (*PbRow) XXX_Marshal 

func (m *PbRow) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*PbRow) XXX_Merge 

func (m *PbRow) XXX_Merge(src proto.Message)

func (*PbRow) XXX_Size 

func (m *PbRow) XXX_Size() int

func (*PbRow) XXX_Unmarshal 

func (m *PbRow) XXX_Unmarshal(b []byte) error

type PbSqlUndoLog 

type PbSqlUndoLog struct {
	SqlType              int32           `protobuf:"varint,1,opt,name=SqlType,proto3" json:"SqlType,omitempty"`
	TableName            string          `protobuf:"bytes,2,opt,name=TableName,proto3" json:"TableName,omitempty"`
	BeforeImage          *PbTableRecords `protobuf:"bytes,3,opt,name=BeforeImage,proto3" json:"BeforeImage,omitempty"`
	AfterImage           *PbTableRecords `protobuf:"bytes,4,opt,name=AfterImage,proto3" json:"AfterImage,omitempty"`
	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
	XXX_unrecognized     []byte          `json:"-"`
	XXX_sizecache        int32           `json:"-"`
}

func (*PbSqlUndoLog) Descriptor 

func (*PbSqlUndoLog) Descriptor() ([]byte, []int)

func (*PbSqlUndoLog) GetAfterImage 

func (m *PbSqlUndoLog) GetAfterImage() *PbTableRecords

func (*PbSqlUndoLog) GetBeforeImage 

func (m *PbSqlUndoLog) GetBeforeImage() *PbTableRecords

func (*PbSqlUndoLog) GetSqlType 

func (m *PbSqlUndoLog) GetSqlType() int32

func (*PbSqlUndoLog) GetTableName 

func (m *PbSqlUndoLog) GetTableName() string

func (*PbSqlUndoLog) ProtoMessage 

func (*PbSqlUndoLog) ProtoMessage()

func (*PbSqlUndoLog) Reset 

func (m *PbSqlUndoLog) Reset()

func (*PbSqlUndoLog) String 

func (m *PbSqlUndoLog) String() string

func (*PbSqlUndoLog) XXX_DiscardUnknown 

func (m *PbSqlUndoLog) XXX_DiscardUnknown()

func (*PbSqlUndoLog) XXX_Marshal 

func (m *PbSqlUndoLog) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*PbSqlUndoLog) XXX_Merge 

func (m *PbSqlUndoLog) XXX_Merge(src proto.Message)

func (*PbSqlUndoLog) XXX_Size 

func (m *PbSqlUndoLog) XXX_Size() int

func (*PbSqlUndoLog) XXX_Unmarshal 

func (m *PbSqlUndoLog) XXX_Unmarshal(b []byte) error

type PbTableRecords 

type PbTableRecords struct {
	TableName            string   `protobuf:"bytes,1,opt,name=TableName,proto3" json:"TableName,omitempty"`
	Rows                 []*PbRow `protobuf:"bytes,2,rep,name=Rows,proto3" json:"Rows,omitempty"`
	XXX_NoUnkeyedLiteral struct{} `json:"-"`
	XXX_unrecognized     []byte   `json:"-"`
	XXX_sizecache        int32    `json:"-"`
}

func (*PbTableRecords) Descriptor 

func (*PbTableRecords) Descriptor() ([]byte, []int)

func (*PbTableRecords) GetRows 

func (m *PbTableRecords) GetRows() []*PbRow

func (*PbTableRecords) GetTableName 

func (m *PbTableRecords) GetTableName() string

func (*PbTableRecords) ProtoMessage 

func (*PbTableRecords) ProtoMessage()

func (*PbTableRecords) Reset 

func (m *PbTableRecords) Reset()

func (*PbTableRecords) String 

func (m *PbTableRecords) String() string

func (*PbTableRecords) XXX_DiscardUnknown 

func (m *PbTableRecords) XXX_DiscardUnknown()

func (*PbTableRecords) XXX_Marshal 

func (m *PbTableRecords) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*PbTableRecords) XXX_Merge 

func (m *PbTableRecords) XXX_Merge(src proto.Message)

func (*PbTableRecords) XXX_Size 

func (m *PbTableRecords) XXX_Size() int

func (*PbTableRecords) XXX_Unmarshal 

func (m *PbTableRecords) XXX_Unmarshal(b []byte) error

type ProtoBufUndoLogParser 

type ProtoBufUndoLogParser struct {
}

func (ProtoBufUndoLogParser) Decode 

func (parser ProtoBufUndoLogParser) Decode(data []byte) *branchUndoLog

func (ProtoBufUndoLogParser) Encode 

func (parser ProtoBufUndoLogParser) Encode(branchUndoLog *branchUndoLog) []byte

func (ProtoBufUndoLogParser) GetDefaultContent 

func (parser ProtoBufUndoLogParser) GetDefaultContent() []byte

func (ProtoBufUndoLogParser) GetName 

func (parser ProtoBufUndoLogParser) GetName() string

type SQLType 

type SQLType byte
const (
	SQLType_SELECT SQLType = iota

	SQLType_INSERT

	SQLType_UPDATE

	SQLType_DELETE

	SQLType_SELECT_FOR_UPDATE

	SQLType_REPLACE

	SQLType_TRUNCATE

	SQLType_CREATE

	SQLType_DROP

	SQLType_LOAD

	SQLType_MERGE

	SQLType_SHOW

	SQLType_ALTER

	SQLType_RENAME

	SQLType_DUMP

	SQLType_DEBUG

	SQLType_EXPLAIN

	SQLType_PROCEDURE

	SQLType_DESC

	SQLType_SET SQLType = 27

	SQLType_RELOAD SQLType = 28

	SQLType_SELECT_UNION SQLType = 29

	SQLType_CREATE_TABLE SQLType = 30

	SQLType_DROP_TABLE SQLType = 31

	SQLType_ALTER_TABLE SQLType = 32

	SQLType_SAVE_POINT SQLType = 33

	SQLType_SELECT_FROM_UPDATE SQLType = 34

	SQLType_MULTI_DELETE SQLType = 35

	SQLType_MULTI_UPDATE SQLType = 36

	SQLType_CREATE_INDEX SQLType = 37

	SQLType_DROP_INDEX SQLType = 38
)

func (SQLType) String 

func (sqlType SQLType) String() string

type SqlDataType 

type SqlDataType int32

type State 

type State byte
const (
	Normal State = iota
	GlobalFinished
)

func (State) String 

func (state State) String() string

type TableMetaCache 

type TableMetaCache struct {
	// contains filtered or unexported fields
}

func GetTableMetaCache 

func GetTableMetaCache(dbName string) *TableMetaCache

func (*TableMetaCache) FetchSchema 

func (cache *TableMetaCache) FetchSchema(conn *mysqlConn, tableName string) (schema.TableMeta, error)

func (*TableMetaCache) GetCacheKey 

func (cache *TableMetaCache) GetCacheKey(tableName string) string

func (*TableMetaCache) GetTableMeta 

func (cache *TableMetaCache) GetTableMeta(conn *mysqlConn, tableName string) (schema.TableMeta, error)

func (*TableMetaCache) Refresh 

func (cache *TableMetaCache) Refresh(conn *mysqlConn, resourceID string)

type UndoLogParser 

type UndoLogParser interface {
	GetName() string

	// return the default content if undo log is empty
	GetDefaultContent() []byte

	Encode(branchUndoLog *branchUndoLog) []byte

	Decode(data []byte) *branchUndoLog
}

func GetUndoLogParser 

func GetUndoLogParser() UndoLogParser

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