FlyingZC opened a new issue, #27078: URL: https://github.com/apache/shardingsphere/issues/27078
# 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 OR REPLACE VIEW hr_po_tab OF XMLType ELEMENT "PurchaseOrder" WITH OBJECT ID DEFAULT AS SELECT XMLtransform(OBJECT_VALUE, x.col1) FROM purchaseorder p, xsl_tab x; ``` ```sql CREATE OR REPLACE VIEW time_c AS (SELECT * FROM edge_time UNION ALL SELECT '2001-13_2', 2001, 5, '2001-05', 13, '2001-13', null, null, 8 -- <gid_of_mon> FROM DUAL); ``` ```sql CREATE OR REPLACE VIEW v1 AS SELECT * FROM employees WHERE employee_id < 150; CREATE OR REPLACE VIEW v2 AS SELECT v1.employee_id employee_id, departments.department_id department_id FROM v1, departments WHERE v1.department_id = departments.department_id; SELECT /*+ NO_MERGE(v2) INDEX(v2.v1.employees emp_emp_id_pk) FULL(v2.departments) */ * FROM v2 WHERE department_id = 30; ``` ```sql CREATE OR REPLACE VIEW v_emp_job_history AS SELECT e1.first_name, e1.last_name, j.job_id, sum(e2.salary) total_sal FROM employees e1, (SELECT * FROM employees e3) e2, job_history j WHERE e1.employee_id = e2.manager_id AND e1.employee_id = j.employee_id AND e1.hire_date = j.start_date AND e1.salary = ( SELECT max(e2.salary) FROM employees e2 WHERE e2.department_id = e1.department_id ) GROUP BY e1.first_name, e1.last_name, j.job_id ORDER BY total_sal; ``` ```sql CREATE OR REPLACE view v_orders AS SELECT l.product_id, SUM(l.quantity*unit_price) revenue, o.order_id, o.customer_id FROM orders o, order_items l WHERE o.order_id = l.order_id GROUP BY l.product_id, o.order_id, o.customer_id; ``` # 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]
