delta/gitlab/gitlab-ce.git/doc/development/migration_style_guide.md, branch ide-diff-cursor

make a little more obvious what operations might need downtime or enhanced migration techniques

2018-03-22T16:08:21+00:00

Shortcut concurrent index creation/removal if no effect.

2018-03-20T17:44:00+00:00

Index creation does not have an effect if the index is present already.
Index removal does not have an affect if the index is not present.

This helps to avoid patterns like this in migrations:
```
if index_exists?(...)
  remove_concurrent_index(...)
end
```

doc: Spelling fixes

2018-01-19T10:09:59+00:00

Add computed update docs for update_column_in_batches

2017-11-17T16:56:50+00:00

Mention schema migrations and patch releases

2017-08-04T11:34:42+00:00

Removed commit guidelines for migrations

2017-08-04T11:34:42+00:00

At some point we decided this isn't really necessary, so let's get rid
of it.

Add database helpers 'add_timestamps_with_timezone' and 'timestamps_with_timezone'

2017-06-13T11:44:13+00:00

Add some documentation for the new migration helpers

2017-05-02T12:10:55+00:00

Prepare for zero downtime migrations

2017-04-12T16:15:19+00:00

Starting with GitLab 9.1.0 we will no longer allow downtime migrations
unless absolutely necessary. This commit updates the various developer
guides and adds code that is necessary to make zero downtime migrations
less painful.

Add remove_concurrent_index to database helper

2017-04-05T22:53:57+00:00