lance6716 comments

Results 444 comments of


                                            lance6716

Support to purge data that is no longer needed in etcd

cc @Ehco1996

support set the session charset for upstream MySQL

seems TiDB will convert to `character_set_result` in https://github.com/pingcap/tidb/pull/20409/files, maybe we could just wait

Support resolve blocking of DMLs when one worker doesn't see all shard DDLs

@GMHDBJD @lichunzhu PTAL about how to resolve this issue

make document better

seems privilege for heartbeat feature already here: https://docs.pingcap.com/zh/tidb-data-migration/stable/feature-overview#%E7%B3%BB%E7%BB%9F%E6%9D%83%E9%99%90

"MIXED" binlog format support

MIXED binlog format may write original SQL in binlog, a DELETE ... id > xxx should be faster than DELETE per row, and this will improve synchronize speed.

Avoid downtream repeating parse SQL

> It seems we need a prepared statement cache? TiDB will handle the cache if we send [PREPARE SQL](https://dev.mysql.com/doc/refman/8.0/en/sql-prepared-statements.html)

Avoid downtream repeating parse SQL

TiDB has spent 9% CPU on parse. And SQL digest generating (3%) will be quicker

syncer: support plugin

/hold

cover all possible scenarios in upgrading tests

please help add more scenarios @GMHDBJD @lichunzhu @glorv @Ehco1996

loader, syncer: support create/drop view

waiting https://github.com/pingcap/dm/pull/1309