[Bug]: alter add and drop unique index concurrent test reported SQL parser error: table "__mo_index_unique_0193ce3e-b010-7f2a-9fd2-589f21018311" does not exist

[heni02]

Is there an existing issue for the same bug?

• I have checked the existing issues.

Branch Name

2.0-dev

Commit ID

d570bbd

Other Environment Information

- Hardware parameters:
- OS type:
- Others:

Actual Behavior

测试场景：alter add unique index和alter drop index 同时并发50测试（100个表）运行5分钟
测试结果：alter drop index 报错SQL parser error: table "__mo_index_unique_0193ce43-1fde-7bb4-af7d-216ee17065b8" does not exist（预期结果报错：internal error: Can't DROP 'index_65'; check that column/key exists）
测试复现步骤见Steps to Reproduce

并发测试sql：

测试日志：
test.log

Expected Behavior

No response

Steps to Reproduce

1. git clone mo-load工具
2. 准备mo 100个表数据：
mysql -h 127.0.0.1 -udump -P6001 -p111 -e "drop database if exists concurrent_test;create database concurrent_test;"
for i in {1..100}; do mysql -h 127.0.0.1 -udump -P6001 -p111 -e "create table concurrent_test.index_$i(col1 bigint primary key auto_increment,col2 int);insert into concurrent_test.index_$i(col2) values(56),(222),(686),(9985)";done
4.执行测试：
cd mo-load
./start.sh -b concurrent_test -c cases/ddl/alter_add_drop_unique_index

Additional information

No response

[heni02]

此方法测试必现
相关issue：#19206

[heni02]

相同的并发测试场景，alter drop次级索引也是报错

测试sql:

ddl：
for i in {1..100}; do mysql -h 127.0.0.1 -udump -P6001 -p111 -e "create table concurrent_test.table_$i(col1 bigint primary key auto_increment,col2 int);insert into concurrent_test.table_$i(col2) values(56),(222),(686),(9985)";done

[heni02]

相同并发测试场景，alter table add/drop column也报错

测试sql：

ddl：
for i in {1..100}; do mysql -h 127.0.0.1 -udump -P6001 -p111 -e "create table concurrent_test.table_$i(col1 bigint primary key auto_increment,col2 int);insert into concurrent_test.table_$i(col2) values(56),(222),(686),(9985)";done