FlyingZC opened a new issue, #27129: URL: https://github.com/apache/shardingsphere/issues/27129
# 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: ```sql CREATE VIEW v AS SELECT e.last_name, e.department_id, d.location_id FROM employees e, departments d WHERE e.department_id = d.department_id; CREATE TABLE t AS SELECT * from employees WHERE employee_id < 200; ``` ```sql CREATE VIEW v_depts OF depts_t WITH OBJECT IDENTIFIER (deptno) AS SELECT d.deptno, d.deptname, CAST(MULTISET(SELECT e.ename, e.salary, e.deptname, CAST(MULTISET(SELECT p.projname, p.mgr FROM projects p WHERE p.mgr = e.ename) AS nt_project_t) FROM emps e WHERE e.deptname = d.deptname) AS nt_emp_t) FROM depts d; ``` ```sql CREATE VIEW warehouse_view AS SELECT VALUE(p) AS warehouse_xml FROM xwarehouses p; ``` ```sql CREATE VIEW time_view AS SELECT time_id, TO_NUMBER(TO_CHAR(time_id, 'ddd')) AS day_in_year FROM times; ``` ```sql CREATE VIEW view_with_unionall AS (SELECT c.rowid crid, c.cust_id, 2 umarker FROM customers c WHERE c.cust_last_name = 'Smith' UNION ALL SELECT c.rowid crid, c.cust_id, 3 umarker FROM customers c WHERE c.cust_last_name = 'Jones'); CREATE MATERIALIZED VIEW unionall_inside_view_mv REFRESH FAST ON DEMAND AS SELECT * FROM view_with_unionall; ``` # 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 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
