29 lines
1.3 KiB
JavaScript
29 lines
1.3 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.MssqlAdapter = void 0;
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const migrator_js_1 = require("../../migration/migrator.js");
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const sql_js_1 = require("../../raw-builder/sql.js");
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const dialect_adapter_base_js_1 = require("../dialect-adapter-base.js");
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class MssqlAdapter extends dialect_adapter_base_js_1.DialectAdapterBase {
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get supportsCreateIfNotExists() {
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return false;
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}
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get supportsTransactionalDdl() {
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return true;
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}
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get supportsOutput() {
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return true;
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}
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async acquireMigrationLock(db) {
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// Acquire a transaction-level exclusive lock on the migrations table.
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// https://learn.microsoft.com/en-us/sql/relational-databases/system-stored-procedures/sp-getapplock-transact-sql?view=sql-server-ver16
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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);
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}
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async releaseMigrationLock() {
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// Nothing to do here. `sp_getapplock` is automatically released at the
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// end of the transaction and since `supportsTransactionalDdl` true, we know
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// the `db` instance passed to acquireMigrationLock is actually a transaction.
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}
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}
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exports.MssqlAdapter = MssqlAdapter;
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