Initial commit - Event Planner application

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

@@ -0,0 +1,25 @@
+/// <reference types="./mssql-adapter.d.ts" />
+import { DEFAULT_MIGRATION_TABLE } from '../../migration/migrator.js';
+import { sql } from '../../raw-builder/sql.js';
+import { DialectAdapterBase } from '../dialect-adapter-base.js';
+export class MssqlAdapter extends DialectAdapterBase {
+    get supportsCreateIfNotExists() {
+        return false;
+    }
+    get supportsTransactionalDdl() {
+        return true;
+    }
+    get supportsOutput() {
+        return true;
+    }
+    async acquireMigrationLock(db) {
+        // Acquire a transaction-level exclusive lock on the migrations table.
+        // https://learn.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-getapplock-transact-sql?view=sql-server-ver16
+        await sql `exec sp_getapplock @DbPrincipal = ${sql.lit('dbo')}, @Resource = ${sql.lit(DEFAULT_MIGRATION_TABLE)}, @LockMode = ${sql.lit('Exclusive')}`.execute(db);
+    }
+    async releaseMigrationLock() {
+        // Nothing to do here. `sp_getapplock` is automatically released at the
+        // end of the transaction and since `supportsTransactionalDdl` true, we know
+        // the `db` instance passed to acquireMigrationLock is actually a transaction.
+    }
+}