FlyingZC opened a new issue, #29189: URL: https://github.com/apache/shardingsphere/issues/29189
# Background Hi community. This issue is for #29149. The ShardingSphere SQL parser engine helps users to parse SQL to create the AST (Abstract Syntax Tree) and visit the AST to get SQLStatement (Java Object). Currently, we are planning to enhance the support for `SQL Server` SQL parsing in ShardingSphere. More details: https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/ # Task This issue is to support more `SQL Server` sql parsing, as follows: ```sql SELECT Person1.name AS PersonName, STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends FROM Person AS Person1, friendOf FOR PATH AS fo, Person FOR PATH AS Person2 WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2)+)) AND Person1.name = 'Jacob' ``` [link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16) ```sql SELECT PersonName, Friends, levels FROM ( SELECT Person1.name AS PersonName, STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends, LAST_VALUE(Person2.name) WITHIN GROUP (GRAPH PATH) AS LastNode, COUNT(Person2.name) WITHIN GROUP (GRAPH PATH) AS levels FROM Person AS Person1, friendOf FOR PATH AS fo, Person FOR PATH AS Person2 WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2)+)) AND Person1.name = 'Jacob' ) AS Q WHERE Q.LastNode = 'Alice' ``` [link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16) ```sql SELECT Person1.name AS PersonName, STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends FROM Person AS Person1, friendOf FOR PATH AS fo, Person FOR PATH AS Person2 WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2){1,3})) AND Person1.name = 'Jacob' ``` [link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16) ```sql SELECT PersonName, Friends FROM ( SELECT Person1.name AS PersonName, STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends, COUNT(Person2.name) WITHIN GROUP (GRAPH PATH) AS levels FROM Person AS Person1, friendOf FOR PATH AS fo, Person FOR PATH AS Person2 WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2){1,3})) AND Person1.name = 'Jacob' ) Q WHERE Q.levels = 2 ``` [link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16) ```sql SELECT Person1.name AS PersonName, STRING_AGG(Person2.name, '->') WITHIN GROUP (GRAPH PATH) AS Friends, Restaurant.name FROM Person AS Person1, friendOf FOR PATH AS fo, Person FOR PATH AS Person2, likes, Restaurant WHERE MATCH(SHORTEST_PATH(Person1(-(fo)->Person2){1,3}) AND LAST_NODE(Person2)-(likes)->Restaurant ) AND Person1.name = 'Jacob' AND Restaurant.name = 'Ginger and Spice' ``` [link](https://learn.microsoft.com/zh-cn/sql/relational-databases/graphs/sql-graph-shortest-path?view=sql-server-ver16) # Process 1. First confirm that this is a correct `SQL Server` sql syntax, if not please leave a message under the issue and ignore it; 2. Compare SQL definitions in Official 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 Statement 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 `SQL Server` 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]
