FlyingZC opened a new issue, #27049: URL: https://github.com/apache/shardingsphere/issues/27049
# 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 MATERIALIZED VIEW products_mv REFRESH FAST ON COMMIT AS SELECT SUM(list_price - min_price), category_id FROM product_information GROUP BY category_id; ``` ```sql CREATE MATERIALIZED VIEW sales_by_age_bracket_mv ENABLE QUERY REWRITE AS SELECT TO_CHAR((2000-c.cust_year_of_birth)/10-0.5,999) AS age_bracket, SUM(s.amount_sold) AS sum_amount_sold FROM sales s, customers c WHERE s.cust_id=c.cust_id GROUP BY TO_CHAR((2000-c.cust_year_of_birth)/10-0.5,999); ``` ```sql CREATE MATERIALIZED VIEW sales_mv (sales_tid, costs_tid) ENABLE QUERY REWRITE AS SELECT s.time_id, c.time_id FROM sales s, products p, costs c WHERE s.prod_id = p.prod_id AND c.prod_id = p.prod_id AND p.prod_name IN (SELECT prod_name FROM products); ``` ```sql CREATE MATERIALIZED VIEW sales_by_month_by_state TABLESPACE example PARALLEL 4 BUILD IMMEDIATE REFRESH COMPLETE ENABLE QUERY REWRITE AS SELECT t.calendar_month_desc, c.cust_state_province, SUM(s.amount_sold) AS sum_sales FROM times t, sales s, customers c WHERE s.time_id = t.time_id AND s.cust_id = c.cust_id GROUP BY t.calendar_month_desc, c.cust_state_province; ``` ```sql CREATE MATERIALIZED VIEW sales_mv AS SELECT t.calendar_year, p.prod_id, SUM(s.amount_sold) AS sum_sales FROM times t, products p, sales s WHERE t.time_id = s.time_id AND p.prod_id = s.prod_id GROUP BY t.calendar_year, p.prod_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]
