TeslaCN opened a new issue, #18962:
URL: https://github.com/apache/shardingsphere/issues/18962
## Bug Report
### Which version of ShardingSphere did you use?
master - 336afce1cc10eb5a03d74707ba0abcd14511fb5e
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy openGauss
### Expected behavior
DDL could be executed on openGauss.
### Actual behavior
```sql
create table acmg_t_cust_info_base (
birthday timestamp,
national varchar(200),
age numeric(20,0)
);
```
GOT
```
ERROR: You have an error in your SQL syntax
```
DDL works on Proxy if `national` was double quoted.
```sql
create table acmg_t_cust_info_base (
birthday timestamp,
"national" varchar(200),
age numeric(20,0)
);
```
### Reason analyze (If you can)

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