FlyingZC opened a new issue, #27067: URL: https://github.com/apache/shardingsphere/issues/27067
# 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 TRIGGER lineitems_trigger AFTER INSERT OR UPDATE OR DELETE ON lineitems FOR EACH ROW BEGIN IF (INSERTING OR UPDATING) THEN UPDATE orders SET line_items_count = NVL(line_items_count,0)+1 WHERE order_id = :new.order_id; END IF; IF (DELETING OR UPDATING) THEN UPDATE orders SET line_items_count = NVL(line_items_count,0)-1 WHERE order_id = :old.order_id; END IF; END; ``` ```sql CREATE OR REPLACE TRIGGER Derived BEFORE INSERT OR UPDATE OF Ename ON Emp ``` ```sql CREATE OR REPLACE PACKAGE tests AS FUNCTION valid (x NUMBER) RETURN CHAR; FUNCTION valid (x DATE) RETURN CHAR; PRAGMA RESTRICT_REFERENCES (valid, WNDS); END; ``` ```sql CREATE OR REPLACE TRIGGER Emp_count AFTER DELETE ON employees DECLARE n INTEGER; BEGIN SELECT COUNT(*) INTO n FROM employees; DBMS_OUTPUT.PUT_LINE('There are now ' || n || ' employees.'); END; ``` ```sql CREATE OR REPLACE TRIGGER Employee_permit_changes BEFORE INSERT OR DELETE OR UPDATE ON employees DECLARE Dummy INTEGER; Not_on_weekends EXCEPTION; Nonworking_hours EXCEPTION; PRAGMA EXCEPTION_INIT (Not_on_weekends, -4097); PRAGMA EXCEPTION_INIT (Nonworking_hours, -4099); BEGIN -- Check for weekends: IF (TO_CHAR(Sysdate, 'DAY') = 'SAT' OR TO_CHAR(Sysdate, 'DAY') = 'SUN') THEN RAISE Not_on_weekends; END IF; -- Check for work hours (8am to 6pm): IF (TO_CHAR(Sysdate, 'HH24') < 8 OR TO_CHAR(Sysdate, 'HH24') > 18) THEN RAISE Nonworking_hours; END IF; EXCEPTION WHEN Not_on_weekends THEN Raise_application_error(-20324,'Might not change ' ||'employee table during the weekend'); WHEN Nonworking_hours THEN Raise_application_error(-20326,'Might not change ' ||'emp table during Nonworking hours'); END; ``` # 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]
