guo-shaoge

Looks like planner assume join key expr is column [here](https://github.com/pingcap/tidb/blob/master/pkg/planner/core/logical_plans.go#L356), but actually it's a `cast` expression. Error stack: ``` [2024/01/15 14:01:23.169 +08:00] [ERROR] [conn.go:1021] ["connection running loop panic"] [conn=1570766854] [session_alias=]...

@Oreoxmt ptal

/merge

Got the same problem, I use shell redirection as workaround.

> How many tables? Does the sql have filters？ 30K tables