FlyingZC opened a new issue, #27076: URL: https://github.com/apache/shardingsphere/issues/27076
# 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 employee_view OF XMLType WITH OBJECT ID (XMLCast(XMLQuery('/Emp/@empno' PASSING OBJECT_VALUE RETURNING CONTENT) AS BINARY_DOUBLE)) AS SELECT sys_XMLGen(emp_t(e.employee_id, e.first_name, e.last_name, e.hire_date), XMLFormat('EMP')) FROM employees e WHERE salary > 15000; SELECT * FROM employee_view; ``` ```sql CREATE OR REPLACE VIEW emp_view OF XMLType WITH OBJECT ID (XMLCast(XMLQuery('/Emp/@empno' PASSING OBJECT_VALUE RETURNING CONTENT) AS BINARY_DOUBLE)) AS SELECT XMLElement("Emp", XMLAttributes(employee_id AS "empno"), XMLForest(e.first_name ||' '|| e.last_name AS "name", e.hire_date AS "hiredate")) AS "result" FROM employees e WHERE salary > 15000; SELECT * FROM emp_view; ``` ```sql CREATE OR REPLACE VIEW emp_v OF emp_t WITH OBJECT ID (empno) AS SELECT emp_t(e.employee_id, e.last_name, e.job_id, e.manager_id, e.hire_date, e.salary, e.commission_pct, dept_t(d.department_id, d.department_name, d.location_id)) FROM employees e, departments d WHERE e.department_id = d.department_id; CREATE OR REPLACE VIEW emp_xml OF XMLType XMLSCHEMA "http://www.oracle.com/emp_complex.xsd"; ELEMENT "Employee" WITH OBJECT ID DEFAULT AS SELECT VALUE(p) FROM emp_v p; ``` ```sql CREATE OR REPLACE VIEW emp_xml OF XMLType XMLSCHEMA "http://www.oracle.com/emp_complex.xsd"; ELEMENT "Employee" WITH OBJECT ID (XMLCast(XMLQuery('/Employee/EMPNO' PASSING OBJECT_VALUE RETURNING CONTENT) AS BINARY_DOUBLE)) AS SELECT emp_t(e.employee_id, e.last_name, e.job_id, e.manager_id, e.hire_date, e.salary, e.commission_pct, dept_t(d.department_id, d.department_name, d.location_id)) FROM employees e, departments d WHERE e.department_id = d.department_id; ``` ```sql CREATE OR REPLACE VIEW purchaseorder_master_view AS SELECT po.* FROM purchaseorder pur, XMLTable( '$p/PurchaseOrder' PASSING pur.OBJECT_VALUE as "p" COLUMNS reference VARCHAR2(30) PATH 'Reference', requestor VARCHAR2(128) PATH 'Requestor', userid VARCHAR2(10) PATH 'User', costcenter VARCHAR2(4) PATH 'CostCenter', ship_to_name VARCHAR2(20) PATH 'ShippingInstructions/name', ship_to_address VARCHAR2(256) PATH 'ShippingInstructions/address', ship_to_phone VARCHAR2(24) PATH 'ShippingInstructions/telephone', instructions VARCHAR2(2048) PATH 'SpecialInstructions') po; ``` # 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]
