From a46eb0a7e18df52a39e5f39ae2c4e67a89c945d9 Mon Sep 17 00:00:00 2001
From: mjr128 <adrien.perez.subtil@gmail.com>
Date: Sat, 6 Dec 2025 15:36:34 +0100
Subject: [PATCH] fix: release query runner when there is no migration to
 revert (#11232)

Co-authored-by: Adrien PEREZ <adrien-perez@samse.fr>
---
 src/migration/MigrationExecutor.ts      |  2 ++
 test/github-issues/11231/issue-11231.ts | 30 +++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 test/github-issues/11231/issue-11231.ts

diff --git a/src/migration/MigrationExecutor.ts b/src/migration/MigrationExecutor.ts
index bff8db8c6..60ae265a6 100644
--- a/src/migration/MigrationExecutor.ts
+++ b/src/migration/MigrationExecutor.ts
@@ -417,6 +417,8 @@ export class MigrationExecutor {
             this.connection.logger.logSchemaBuild(
                 `No migrations were found in the database. Nothing to revert!`,
             )
+            // if query runner was created by us then release it
+            if (!this.queryRunner) await queryRunner.release()
             return
         }
 
diff --git a/test/github-issues/11231/issue-11231.ts b/test/github-issues/11231/issue-11231.ts
new file mode 100644
index 000000000..e695c9ce5
--- /dev/null
+++ b/test/github-issues/11231/issue-11231.ts
@@ -0,0 +1,30 @@
+import { expect } from "chai"
+import "reflect-metadata"
+import { DataSource } from "../../../src/data-source/DataSource"
+import {
+    closeTestingConnections,
+    createTestingConnections,
+} from "../../utils/test-utils"
+
+describe("github issues > #11231 Error trying to revert last migration when there is none on Oracle", () => {
+    let dataSources: DataSource[]
+    before(
+        async () =>
+            (dataSources = await createTestingConnections({
+                entities: [],
+                enabledDrivers: ["oracle"],
+                migrations: [],
+                schemaCreate: false,
+                dropSchema: true,
+            })),
+    )
+    after(() => closeTestingConnections(dataSources))
+
+    it("should not throw when migrations list is empty", () =>
+        Promise.all(
+            dataSources.map(async (dataSource) => {
+                await dataSource.undoLastMigration()
+                expect(await dataSource.destroy()).to.not.throw
+            }),
+        ))
+})