knex: add MySqlConnectionConfig, tests (#13161)

* knex: add MySqlConnectionConfig, tests

* knex: add types for MySqlConnectionConfig queryFormat params

knex/knex-tests.ts

@@ -36,6 +36,19 @@ var knex = Knex({
   }
 });
 
+// Mysql configuration
+var knex = Knex({
+  debug: true,
+  client: 'mysql',
+  connection: {
+    host     : '127.0.0.1',
+    user     : 'your_database_user',
+    password : 'your_database_password',
+    db       : 'myapp_test',
+    trace: false
+  }
+});
+
 // Pooling
 var knex = Knex({
   client: 'mysql',

knex/knex.d.ts

@@ -455,7 +455,7 @@ declare module "knex" {
       client?: string;
       dialect?: string;
       connection?: string|ConnectionConfig|MariaSqlConnectionConfig|
-        Sqlite3ConnectionConfig|SocketConnectionConfig;
+        MySqlConnectionConfig|Sqlite3ConnectionConfig|SocketConnectionConfig;
       pool?: PoolConfig;
       migrations?: MigratorConfig;
       acquireConnectionTimeout?: number;
@@ -503,6 +503,32 @@ declare module "knex" {
       rejectUnauthorized?: boolean;
     }
 
+    // Config object for mysql: https://github.com/mysqljs/mysql#connection-options
+    interface MySqlConnectionConfig {
+      host?: string;
+      port?: number;
+      localAddress?: string;
+      socketPath?: string;
+      user?: string;
+      password?: string;
+      database?: string;
+      charset?: string;
+      timezone?: string;
+      connectTimeout?: number;
+      stringifyObjects?: boolean;
+      insecureAuth?: boolean;
+      typeCast?: boolean;
+      queryFormat?: (query: string, values: any) => string;
+      supportBigNumbers?: boolean;
+      bigNumberStrings?: boolean;
+      dateStrings?: boolean;
+      debug?: boolean;
+      trace?: boolean;
+      multipleStatements?: boolean;
+      flags?: string;
+      ssl?: string | MariaSslConfiguration;
+    }
+
     /** Used with SQLite3 adapter */
     interface Sqlite3ConnectionConfig {
       filename: string;