FlyingZC opened a new issue, #27692: URL: https://github.com/apache/shardingsphere/issues/27692
# Background Hi community, 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 openGauss SQL parsing in ShardingSphere. More details: https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/ # Task This issue is to support more openGauss sql parse, as follows: ```sql create function test_event_trigger() returns event_trigger as $$ BEGIN RAISE NOTICE 'test_event_trigger: % %', tg_event, tg_tag; END $$ language plpgsql; --创建事件触发器函数(用于sql_drop事件) ``` ```sql CREATE OR REPLACE FUNCTION drop_sql_command() RETURNS event_trigger AS $$ BEGIN RAISE NOTICE '% - sql_drop', tg_tag; END; $$ LANGUAGE plpgsql; --创建事件触发器函数(用于table_rewrite事件) ``` ```sql CREATE OR REPLACE FUNCTION test_evtrig_no_rewrite() RETURNS event_trigger LANGUAGE plpgsql AS $$ BEGIN RAISE EXCEPTION 'rewrites not allowed'; END; $$; --创建事件类型为ddl_command_start的事件触发器 ``` ```sql create event trigger regress_event_trigger on ddl_command_start execute procedure test_event_trigger(); --创建事件类型为ddl_command_end的事件触发器 ``` ```sql create event trigger regress_event_trigger_end on ddl_command_end execute procedure test_event_trigger(); --创建事件类型为sql_drop的事件触发器 ``` # Process 1. First confirm that this is a correct openGauss 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 openGauss 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]
