Mattias Jonsson

Not sure it helps, but there is a change in MySQL 8.0 that was contributed by me, https://bugs.mysql.com/bug.php?id=93240 / https://github.com/mysql/mysql-server/commit/14508bbb1790697c28659dd051fbc855cd3b5da9 where, instead of just closing the connection, it tries to...

> I'm not sure if this patch is intended to solve the query latency spike issue caused by rolling restart of PD. If so, this patch may not solve the...

ADD PARTITION is already supported, it uses the same logic as for TRUNCATE PARTITION, i.e. reading from the Global Index will filter away dropped/added partitions, so it will only show...

@Defined2014, for the global index, should there be some way to specify placement rules? I don't think there are any for normal indexes?

> I think it will follow table's placement rules and it is in line with my expectations. What do you think @mjonss ? And we could add some test cases...

Looks like only the first sub job will create a new schema diff. The following ones will skip it due to `proxyJob.MultiSchemaInfo.SkipVersion = true` [here](https://github.com/pingcap/tidb/blob/515899f090d1349457500e1170edfbebcdaf9ebd/pkg/ddl/multi_schema_change.go#L115). @tangenta do you have any...

Also is it possible to create either test for this, maybe an integration test and using `--replace_regex` to make sure there are a microsecond part?

With `while` also `inc`/`dec` is handy together with `let`/`eval`.

Also `--source` is sometimes used, to repeat same queries within a single test.

@Defined2014 [ ] Support error check code, like https://github.com/pingcap/mysql-tester/pull/52 you mean?