FlyingZC opened a new issue, #27689:
URL: https://github.com/apache/shardingsphere/issues/27689

   # Background
   Hi community,
   
   ShardingSphere parser engine helps users parse a SQL to get the AST 
(Abstract Syntax Tree) and visit this tree to get SQLStatement (Java Object). 
Currently, we are planning to enhance the support for openGauss SQL parsing in 
ShardingSphere.
   
   More details:
   
https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/
   
   # Task
   This issue is to support more openGauss sql parse, as follows:
   ```sql
    CREATE ROLE role1 IDENTIFIED BY 'xxxxxxxxx';
   
   -- 为用户role1创建一个同名schema,子命令创建的表films和winners的拥有者为role1。
   
   ```
   
   ```sql
    CREATE SCHEMA ds CHARACTER SET utf8mb4 COLLATE utf8mb4_bin;
   
   --删除schema。
   
   ```
   
   ```sql
    DROP USER role1 CASCADE;
   ```
   
   ```sql
    CREATE RESOURCE LABEL mask_lb1 ADD COLUMN(tb_for_masking.col1);
   
   --创建资源标签标记敏感列col2
   
   ```
   
   ```sql
    CREATE RESOURCE LABEL mask_lb2 ADD COLUMN(tb_for_masking.col2);
   
   --对访问敏感列col1的操作创建脱敏策略
   
   ```
   
   # Process
   1. First confirm that this is a correct openGauss sql syntax, if not please 
leave a message under the issue and ignore it;
   2. Compare SQL definitions in Official SQL Doc and ShardingSphere SQL Doc;
   3. If there is any difference in ShardingSphere SQL Doc, please correct them 
by referring to the Official SQL Doc;
   4. Run mvn install the current_file_module;
   5. Check whether there are any exceptions. If indeed, please fix them. 
(Especially xxxVisitor.class);
   6. Add new corresponding SQL case in SQL Cases and expected parsed result in 
Expected Statement XML;
   7. Run SQLParserParameterizedTest to make sure no exceptions.
   
   # Relevant Skills
   1. Master JAVA language
   2. Have a basic understanding of Antlr `g4` file
   3. Be familiar with openGauss SQLs


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