Support parsing Oracle CREATE VIEW sql

[FlyingZC]

Background

Hi community,
This issue is for #26878.

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 Oracle SQL parsing in ShardingSphere.

More details:
https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/

Task

This issue is to support more oracle sql parse, as follows:

CREATE VIEW lowsal AS 
    SELECT * FROM employees 
    WHERE salary < 10000;

CREATE VIEW emp_mgr AS
     SELECT e1.ename, e2.ename mname
     FROM emp e1, emp e2
     WHERE e1.mgr = e2.empno
     WITH CHECK OPTION;

CREATE VIEW emp_view AS 
   SELECT last_name, salary*12 annual_salary
   FROM employees 
   WHERE department_id = 20;

CREATE VIEW emp_v_2 AS
    SELECT empno, ename, deptno
        FROM emp
            WHERE sal > 1000;

CREATE VIEW emp AS 
     SELECT empno, ename, mgr, deptno 
     FROM company.emp;

Process

1. First confirm that this is a correct oracle sql syntax, if not please ignore;
2. Compare SQL definitions in Oficial 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 Statment 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 Oracle SQLs

[github-actions]

There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.

[github-actions]

There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.

[zihaoAK47]

Hi please assign the questions to me. Thank you

[strongduanmu]

Fixed by #29075