FlyingZC opened a new issue, #27038: URL: https://github.com/apache/shardingsphere/issues/27038
# 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 avg_sales_city_state_mv ENABLE QUERY REWRITE AS SELECT c.cust_city, c.cust_state_province, AVG(s.amount_sold) FROM sales s, customers c WHERE s.cust_id = c.cust_id GROUP BY c.cust_city, c.cust_state_province; ``` ```sql CREATE MATERIALIZED VIEW credit_mv1 ENABLE QUERY REWRITE AS SELECT cust_last_name, cust_first_name, cust_credit_limit, cust_year_of_birth FROM customers WHERE cust_credit_limit BETWEEN 1000 AND 5000; ``` ```sql CREATE MATERIALIZED VIEW credit_mv1 ENABLE QUERY REWRITE AS SELECT cust_last_name, cust_first_name, cust_credit_limit, cust_year_of_birth FROM customers WHERE cust_credit_limit BETWEEN 1000 AND 10000 AND cust_year_of_birth BETWEEN 1945 AND 1964; ``` ```sql CREATE MATERIALIZED VIEW cal_month_sales_mv ENABLE QUERY REWRITE AS SELECT t.calendar_month_desc, SUM(s.amount_sold) AS dollars FROM sales s, times t WHERE s.time_id = t.time_id GROUP BY t.calendar_month_desc; ``` ```sql CREATE MATERIALIZED VIEW cust_avg_credit_mv1 ENABLE QUERY REWRITE AS SELECT cust_postal_code, cust_year_of_birth, SUM(cust_credit_limit) AS sum_credit, COUNT(cust_credit_limit) AS count_credit FROM customers WHERE cust_year_of_birth BETWEEN 1940 AND 1950 GROUP BY cust_postal_code, cust_year_of_birth; CREATE MATERIALIZED VIEW cust_avg_credit_mv2 ENABLE QUERY REWRITE AS SELECT cust_postal_code, cust_year_of_birth, SUM(cust_credit_limit) AS sum_credit, COUNT(cust_credit_limit) AS count_credit FROM customers WHERE cust_year_of_birth > 1950 AND cust_year_of_birth <= 1970 GROUP BY cust_postal_code, cust_year_of_birth; ``` # 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]
