parser: Fix high not precedence

[zmix999]

issues #629

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[xmabul]

支持范围能否再扩大点？mysql8创建字段已支持default (expression)，目前审核如下SQL还是会报错

create table t_fun1(
    id int not null auto_increment primary key,
    val varchar(20) not null default '',
    val2 varchar(20) default (val)
)

[zmix999]

我找时间测试下

[zmix999]

https://github.com/zmix999/goInception 可以看下我fork的分支