go-sample-webpage/vendor/github.com/golang-migrate/migrate/v4/database/mysql/README.md

MySQL

mysql://user:password@tcp(host:port)/dbname?query

URL Query	WithInstance Config	Description
x-migrations-table	MigrationsTable	Name of the migrations table
x-no-lock	NoLock	Set to true to skip GET_LOCK/RELEASE_LOCK statements. Useful for multi-master MySQL flavors. Only run migrations from one host when this is enabled.
dbname	DatabaseName	The name of the database to connect to
user		The user to sign in as
password		The user's password
host		The host to connect to.
port		The port to bind to.
tls		TLS / SSL encrypted connection parameter; see go-sql-driver. Use any name (e.g. migrate) if you want to use a custom TLS config (x-tls- queries).
x-tls-ca		The location of the CA (certificate authority) file.
x-tls-cert		The location of the client certicicate file. Must be used with x-tls-key.
x-tls-key		The location of the private key file. Must be used with x-tls-cert.
x-tls-insecure-skip-verify		Whether or not to use SSL (true|false)

Use with existing client

If you use the MySQL driver with existing database client, you must create the client with parameter multiStatements=true:

package main

import (
    "database/sql"
    
    _ "github.com/go-sql-driver/mysql"
    "github.com/golang-migrate/migrate"
    "github.com/golang-migrate/migrate/database/mysql"
    _ "github.com/golang-migrate/migrate/source/file"
)

func main() {
    db, _ := sql.Open("mysql", "user:password@tcp(host:port)/dbname?multiStatements=true")
    driver, _ := mysql.WithInstance(db, &mysql.Config{})
    m, _ := migrate.NewWithDatabaseInstance(
        "file:///migrations",
        "mysql", 
        driver,
    )
    
    m.Steps(2)
}

Upgrading from v1

1. Write down the current migration version from schema_migrations
2. DROP TABLE schema_migrations
3. Wrap your existing migrations in transactions (BEGIN/COMMIT) if you use multiple statements within one migration.
4. Download and install the latest migrate version.
5. Force the current migration version with migrate force <current_version>.