SchemaBuilder unable to apply diff from BR

[jiaqizho]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1. tiup start cluster nightly
2. use BR 6.0 TIDB 6.0
3. BR import tpch10
4. set tiflash REPLICA 1
5. Then the table in databases will be no exist.

log :

[2022/03/07 19:59:27.435 +08:00] [INFO] [<unknown>] ["SchemaSyncer:start to sync schemas. current version is: 51 and try to sync schema version to: 52"] [thread_id=18]
[2022/03/07 19:59:27.435 +08:00] [DEBUG] [<unknown>] ["SchemaSyncer:try load schema diffs."] [thread_id=18]
[2022/03/07 19:59:27.436 +08:00] [DEBUG] [<unknown>] ["SchemaSyncer:end load schema diffs."] [thread_id=18]
[2022/03/07 19:59:27.436 +08:00] [DEBUG] [<unknown>] ["SchemaGetter:Get DB Info from TiKV : {\"id\":79,\"db_name\":{\"O\":\"tiflash_replicas\",\"L\":\"tiflash_replicas\"},\"charset\":\"utf8mb4\",\"collate\":\"utf8mb4_bin\",\"state\":5,\"policy_ref_info\":null}"] [thread_id=18]
[2022/03/07 19:59:27.436 +08:00] [INFO] [<unknown>] ["SchemaBuilder:ignore change type: 60"] [thread_id=18]
[2022/03/07 19:59:27.436 +08:00] [INFO] [<unknown>] ["SchemaSyncer:end sync schema, version has been updated to 52"] [thread_id=18]
[2022/03/07 19:59:27.437 +08:00] [INFO] [<unknown>] ["KVStore:Pre-handle snapshot to DTFiles is ignored because the table is dropped [region 1031, applied: term 6 index 7]"] [thread_id=18]
[2022/03/07 19:59:27.437 +08:00] [INFO] [<unknown>] ["KVStore:Pre-handle snapshot to DTFiles is ignored because the table is dropped [region 1035, applied: term 6 index 7]"] [thread_id=19]

2. What did you expect to see? (Required)

3. What did you see instead (Required)

4. What is your TiFlash version? (Required)

[jiaqizho]

TiDB side have this type , but seem like Tiflash have not support yet.

[jiaqizho]

relative tidb pr : pingcap/tidb#28763

[JaySon-Huang]

Resolved by #4194