kysely
Version:
Type safe SQL query builder
31 lines (30 loc) • 1.53 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.MssqlAdapter = void 0;
const migrator_js_1 = require("../../migration/migrator.js");
const sql_js_1 = require("../../raw-builder/sql.js");
const dialect_adapter_base_js_1 = require("../dialect-adapter-base.js");
class MssqlAdapter extends dialect_adapter_base_js_1.DialectAdapterBase {
get supportsCreateIfNotExists() {
return false;
}
get supportsTransactionalDdl() {
return true;
}
get supportsReturning() {
// mssql should support returning with the `output` clause.
// we need to figure this out when we'll introduce support for it.
return false;
}
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 (0, sql_js_1.sql) `exec sp_getapplock @DbPrincipal = ${sql_js_1.sql.lit('dbo')}, @Resource = ${sql_js_1.sql.lit(migrator_js_1.DEFAULT_MIGRATION_TABLE)}, @LockMode = ${sql_js_1.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.
}
}
exports.MssqlAdapter = MssqlAdapter;