FlyingZC opened a new issue, #27855:
URL: https://github.com/apache/shardingsphere/issues/27855

   # 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 USER alice PASSWORD '********'; 
   -- 使用普通用户alice的账户,连接密态数据库,并执行本语法。
    gsql -p 57101 postgres -U alice -r -C 
   -- 创建客户端加密主密钥(CMK)对象。
    openGauss=> CREATE CLIENT MASTER KEY alice_cmk WITH (KEY_STORE = localkms , 
KEY_PATH = "key_path_value”, ALGORITHM = RSA_2048); 
   -- 创建客户端列加密密钥(CEK)对象。
    openGauss=> CREATE COLUMN ENCRYPTION KEY ImgCEK WITH VALUES 
(CLIENT_MASTER_KEY = alice_cmk, ALGORITHM  = AEAD_AES_256_CBC_HMAC_SHA256);
   ```
   
   ```sql
   // 创建客户端主密钥
    Connection conn = 
DriverManager.getConnection("url","user","password");Statement stmt = 
conn.createStatement();int rc = stmt.executeUpdate("CREATE CLIENT MASTER KEY 
ImgCMK1 WITH ( KEY_STORE = localkms , KEY_PATH = "key_path_value" , ALGORITHM = 
AES_256_CBC);"); 
   
    // 创建列加密密钥
    int rc2 = stmt.executeUpdate("CREATE COLUMN ENCRYPTION KEY ImgCEK1 WITH 
VALUES (CLIENT_MASTER_KEY = ImgCMK1, ALGORITHM  = 
AEAD_AES_256_CBC_HMAC_SHA256);");
   ```
   
   ```sql
    CREATE TABLE creditcard_info (id_number int, name text encrypted with 
(column_encryption_key = ImgCEK, encryption_type = DETERMINISTIC),credit_card  
varchar(19) encrypted with (column_encryption_key = ImgCEK, encryption_type = 
DETERMINISTIC));
   ```
   
   ```sql
   int rc3 = stmt.executeUpdate("CREATE TABLE creditcard_info (id_number    
int, name  varchar(50) encrypted with (column_encryption_key = ImgCEK, 
encryption_type = DETERMINISTIC),credit_card  varchar(19) encrypted with 
(column_encryption_key = ImgCEK1, encryption_type = DETERMINISTIC));");
   ```
   
   ```sql
    INSERT INTO creditcard_info VALUES (1,'joe','6217986500001288393'); 
    INSERT 0 1 
    
   ```
   
   # 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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