FlyingZC opened a new issue, #27706:
URL: https://github.com/apache/shardingsphere/issues/27706

   # 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 TABLESPACE ds_location1 RELATIVE LOCATION 'tablespace/tablespace_1';
   
   --创建用户joe。
   
   ```
   
   ```sql
    CREATE ROLE joe IDENTIFIED BY 'xxxxxxxxx';
   
   --创建用户jay。
   
   ```
   
   ```sql
    CREATE ROLE jay IDENTIFIED BY 'xxxxxxxxx';
   
   --创建表空间,且所有者指定为用户joe。
   
   ```
   
   ```sql
    CREATE TABLESPACE ds_location2 OWNER joe RELATIVE LOCATION 
'tablespace/tablespace_1';
   
   --把表空间ds_location1重命名为ds_location3,指定option WAIT,不影响实际功能。
   
   ```
   
   ```sql
    ALTER TABLESPACE ds_location1 RENAME TO ds_location3 WAIT;
   
   --改变表空间ds_location2的所有者,指定option ENGINE,不影响实际功能。
   
   ```
   
   # 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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