fix(db/pool): set pool after confirming a connection

Author: thelindat

src/database/pool.ts

@@ -10,23 +10,24 @@ export async function createConnectionPool() {
   const config = getConnectionOptions();
 
   try {
-    pool = createPool(config);
+    const dbPool = createPool(config);
 
-    pool.on('connection', (connection) => {
+    dbPool.on('connection', (connection) => {
       connection.query(mysql_transaction_isolation_level);
     });
 
     using conn = await getConnection();
-  
-    const result = await conn.query('SELECT VERSION() as version') as RowDataPacket[];
+
+    const result = (await conn.query('SELECT VERSION() as version')) as RowDataPacket[];
     dbVersion = `^5[${result[0].version}]`;
 
     console.log(`${dbVersion} ^2Database server connection established!^0`);
 
     if (config.multipleStatements) {
-      console.warn(`multipleStatements is enabled. Used incorrectly, this option may cause SQL injection.`)
+      console.warn(`multipleStatements is enabled. Used incorrectly, this option may cause SQL injection.`);
     }
-    
+
+    pool = dbPool;
   } catch (err: any) {
     const message = err.message.includes('auth_gssapi_client')
       ? `Requested authentication using unknown plugin auth_gssapi_client.`
@@ -38,7 +39,7 @@ export async function createConnectionPool() {
       }: ${message}^0`
     );
 
-    console.log(`See https://github.com/overextended/oxmysql/issues/154 for more information.`)
+    console.log(`See https://github.com/overextended/oxmysql/issues/154 for more information.`);
 
     if (config.password) config.password = '******';