FlyingZC opened a new issue, #27639:
URL: https://github.com/apache/shardingsphere/issues/27639

   # 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
    GRANT USAGE ON COLUMN_ENCRYPTION_KEY MyCEK1 to newuser;
   GRANT
   
   ```
   
   ```sql
    GRANT USAGE ON CLIENT_MASTER_KEY MyCMK1 to newuser;
   ```
   
   ```sql
    SET SESSION AUTHORIZATION newuser PASSWORD 'xxxxxxxxx';
   openGauss=>  CREATE TABLE acltest1 (x int, x2 varchar(50) ENCRYPTED WITH 
(COLUMN_ENCRYPTION_KEY = MyCEK1, ENCRYPTION_TYPE = DETERMINISTIC));
   CREATE TABLE
   openGauss=> SELECT has_cek_privilege('newuser', 'MyCEK1', 'USAGE');
   ```
   
   ```sql
    REVOKE USAGE ON COLUMN_ENCRYPTION_KEY MyCEK1 FROM newuser;
   
   ```
   
   ```sql
    REVOKE USAGE ON CLIENT_MASTER_KEY MyCMK1 FROM newuser;
   
   ```
   
   # 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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