FlyingZC opened a new issue, #27044: URL: https://github.com/apache/shardingsphere/issues/27044
# 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 join_sales_time_product_mv ENABLE QUERY REWRITE AS SELECT p.prod_id, p.prod_name, t.time_id, t.week_ending_day, s.channel_id, s.promo_id, s.cust_id, s.amount_sold FROM sales s, products p, times t WHERE s.time_id=t.time_id AND s.prod_id = p.prod_id; CREATE MATERIALIZED VIEW sum_sales_time_product_mv ENABLE QUERY REWRITE AS SELECT mv.prod_name, mv.week_ending_day, COUNT(*) cnt_all, SUM(mv.amount_sold) sum_amount_sold, COUNT(mv.amount_sold) cnt_amount_sold FROM join_sales_time_product_mv mv GROUP BY mv.prod_name, mv.week_ending_day; ``` ```sql CREATE MATERIALIZED VIEW mv3 ENABLE QUERY REWRITE AS SELECT prod_name, TO_CHAR(sales.time_id,'yyyy-mm') AS month, SUM(amount_sold) AS sum_sales FROM sales, products WHERE sales.prod_id = products.prod_id GROUP BY prod_name, TO_CHAR(sales_time_id, 'yyyy-mm'); ``` ```sql CREATE MATERIALIZED VIEW popular_promo_sales_mv BUILD IMMEDIATE REFRESH FORCE ENABLE QUERY REWRITE AS SELECT p.promo_name, SUM(s.amount_sold) AS sum_amount_sold FROM promotions p, sales s WHERE s.promo_id = p.promo_id AND p.promo_name IN ('coupon', 'premium', 'giveaway') GROUP BY promo_name; ``` ```sql CREATE MATERIALIZED VIEW mv_prod_time REFRESH COMPLETE ON DEMAND AS SELECT (CASE WHEN ((GROUPING(calendar_year)=0 ) AND (GROUPING(calendar_quarter_desc)=1 )) THEN (TO_CHAR(calendar_year) || '_0') WHEN ((GROUPING(calendar_quarter_desc)=0 ) AND (GROUPING(calendar_month_desc)=1 )) THEN (TO_CHAR(calendar_quarter_desc) || '_1') WHEN ((GROUPING(calendar_month_desc)=0 ) AND (GROUPING(t.time_id)=1 )) THEN (TO_CHAR(calendar_month_desc) || '_2') ELSE (TO_CHAR(t.time_id) || '_3') END) Hierarchical_Time, calendar_year year, calendar_quarter_desc quarter, calendar_month_desc month, t.time_id day, prod_category cat, prod_subcategory subcat, p.prod_id prod, GROUPING_ID(prod_category, prod_subcategory, p.prod_id, calendar_year, calendar_quarter_desc, calendar_month_desc,t.time_id) gid, GROUPING_ID(prod_category, prod_subcategory, p.prod_id) gid_p, GROUPING_ID(calendar_year, calendar_quarter_desc, calendar_month_desc, t.time_id) gid_t, SUM(amount_sold) s_sold, COUNT(amount_sold) c_sold, COUNT(*) cnt FROM SALES s, TIMES t, PRODUCTS p WHERE s.time_id = t.time_id AND p.prod_name IN ('Bounce', 'Y Box') AND s.prod_id = p.prod_id GROUP BY ROLLUP(calendar_year, calendar_quarter_desc, calendar_month_desc, t.time_id), ROLLUP(prod_category, prod_subcategory, p.prod_id); ``` ```sql CREATE MATERIALIZED VIEW join_sales_time_product_mv ENABLE QUERY REWRITE AS SELECT p.prod_id, p.prod_name, t.time_id, t.week_ending_day, s.channel_id, s.promo_id, s.cust_id, s.amount_sold FROM sales s, products p, times t WHERE s.time_id=t.time_id AND s.prod_id = p.prod_id; CREATE MATERIALIZED VIEW join_sales_time_product_oj_mv ENABLE QUERY REWRITE AS SELECT p.prod_id, p.prod_name, t.time_id, t.week_ending_day, s.channel_id, s.promo_id, s.cust_id, s.amount_sold FROM sales s, products p, times t WHERE s.time_id=t.time_id AND s.prod_id=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]
