---
title: "POST /v1/{+session}:rollback"
method: POST
path: "/v1/{+session}:rollback"
tags: ["projects"]
---

# POST /v1/{+session}:rollback

`POST /v1/{+session}:rollback`

Rolls back a transaction, releasing any locks it holds. It's a good idea to call this for any transaction that includes one or more Read or ExecuteSql requests and ultimately decides not to commit. `Rollback` returns `OK` if it successfully aborts the transaction, the transaction was already aborted, or the transaction isn't found. `Rollback` never returns `ABORTED`.

## Path parameters

- `session` string, required

## Request body

- RollbackRequest — The request for Rollback.
  - `transactionId` string, byte — Required. The transaction to roll back.

## Response `200`

Successful response

---

[API](https://skmtc.net/google/apis/spanner.md) · [All operations](https://skmtc.net/google/apis/spanner/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/google/spanner/versions/4b66067d2622/schema)