Initial commit - Event Planner application

node_modules/kysely/dist/esm/dialect/mysql/mysql-adapter.js

@@ -0,0 +1,25 @@
+/// <reference types="./mysql-adapter.d.ts" />
+import { sql } from '../../raw-builder/sql.js';
+import { DialectAdapterBase } from '../dialect-adapter-base.js';
+const LOCK_ID = 'ea586330-2c93-47c8-908d-981d9d270f9d';
+const LOCK_TIMEOUT_SECONDS = 60 * 60;
+export class MysqlAdapter extends DialectAdapterBase {
+    get supportsTransactionalDdl() {
+        return false;
+    }
+    get supportsReturning() {
+        return false;
+    }
+    async acquireMigrationLock(db, _opt) {
+        // Kysely uses a single connection to run the migrations. Because of that, we
+        // can take a lock using `get_lock`. Locks acquired using `get_lock` get
+        // released when the connection is destroyed (session ends) or when the lock
+        // is released using `release_lock`. This way we know that the lock is either
+        // released by us after successfull or failed migrations OR it's released by
+        // MySQL if the process gets killed for some reason.
+        await sql `select get_lock(${sql.lit(LOCK_ID)}, ${sql.lit(LOCK_TIMEOUT_SECONDS)})`.execute(db);
+    }
+    async releaseMigrationLock(db, _opt) {
+        await sql `select release_lock(${sql.lit(LOCK_ID)})`.execute(db);
+    }
+}