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Move from max( id ) to max( index ) for latest commit statuses (#30076) #30155

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merged 2 commits into from
Mar 28, 2024

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@stevapple stevapple commented Mar 28, 2024

Backport #30076.

This PR replaces the use of max( id ), and instead using max( `index` ) for determining the latest commit status. Building business logic over an auto_increment primary key like id is risky and there’re already plenty of discussions on the Internet.

There‘s no guarantee for auto_increment values to be monotonic, especially upon failures or with a cluster. In the specific case, we met the problem of commit statuses being outdated when using TiDB as the database. As being
documented
, auto_increment values assigned to an insert statement will only be monotonic on a per server (node) basis.

Closes #30074.

…o-gitea#30076)

This PR replaces the use of `max( id )`, and instead using ``max(
`index` )`` for determining the latest commit status. Building business
logic over an `auto_increment` primary key like `id` is risky and
there’re already plenty of discussions on the Internet.

There‘s no guarantee for `auto_increment` values to be monotonic,
especially upon failures or with a cluster. In the specific case, we met
the problem of commit statuses being outdated when using TiDB as the
database. As [being
documented](https://docs.pingcap.com/tidb/stable/auto-increment),
`auto_increment` values assigned to an `insert` statement will only be
monotonic on a per server (node) basis.

Closes go-gitea#30074.
@GiteaBot GiteaBot added this to the 1.21.11 milestone Mar 28, 2024
@GiteaBot GiteaBot added the lgtm/need 2 This PR needs two approvals by maintainers to be considered for merging. label Mar 28, 2024
@pull-request-size pull-request-size bot added the size/L Denotes a PR that changes 100-499 lines, ignoring generated files. label Mar 28, 2024
@github-actions github-actions bot added the modifies/go Pull requests that update Go code label Mar 28, 2024
@GiteaBot GiteaBot added lgtm/need 1 This PR needs approval from one additional maintainer to be merged. and removed lgtm/need 2 This PR needs two approvals by maintainers to be considered for merging. labels Mar 28, 2024
@GiteaBot GiteaBot added lgtm/done This PR has enough approvals to get merged. There are no important open reservations anymore. and removed lgtm/need 1 This PR needs approval from one additional maintainer to be merged. labels Mar 28, 2024
@silverwind silverwind enabled auto-merge (squash) March 28, 2024 16:07
@silverwind silverwind merged commit b1dae9f into go-gitea:release/v1.21 Mar 28, 2024
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