FlyingZC opened a new issue, #27160: URL: https://github.com/apache/shardingsphere/issues/27160
# 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 SET SERVEROUTPUT ON DECLARE Rewrite_Array SYS.RewriteArrayType := SYS.RewriteArrayType(); querytxt VARCHAR2(1500) := 'SELECT c.cust_state_province, AVG(s.amount_sold) FROM sales s, customers c WHERE s.cust_id = c.cust_id GROUP BY c.cust_state_province'; i NUMBER; BEGIN DBMS_MVIEW.EXPLAIN_REWRITE(querytxt, 'AVG_SALES_CITY_STATE_MV', Rewrite_Array); FOR i IN 1..Rewrite_Array.count LOOP DBMS_OUTPUT.PUT_LINE(Rewrite_Array(i).message); END LOOP; END; ``` ```sql SET ATTRIBUTE 'attribute_name' = 'attribute_value' ``` ```sql SET SERVEROUTPUT ON DECLARE dequeue_options DBMS_AQ.dequeue_options_t; msg_prop_array DBMS_AQ.message_properties_array_t := DBMS_AQ.message_properties_array_t(); payload_array test.msg_table; msgid_array DBMS_AQ.msgid_array_t; retval PLS_INTEGER; BEGIN retval := DBMS_AQ.DEQUEUE_ARRAY( queue_name => 'test.obj_queue', dequeue_options => dequeue_options, array_size => 2, message_properties_array => msg_prop_array, payload_array => payload_array, msgid_array => msgid_array); DBMS_OUTPUT.PUT_LINE('Number of messages dequeued: ' || retval); END; ``` ```sql SET AUTOTRACE ON EXPLAIN SELECT XMLQuery('/PurchaseOrder/Requestor' PASSING OBJECT_VALUE RETURNING CONTENT) FROM po_clob WHERE XMLExists('/PurchaseOrder[Reference="SBELL-2002100912333601PDT"]' PASSING OBJECT_VALUE); ``` ```sql SET AUTOTRACE ON EXPLAIN SELECT li.description, li.itemno FROM po_clob, XMLTable('/PurchaseOrder/LineItems/LineItem' PASSING OBJECT_VALUE COLUMNS "DESCRIPTION" VARCHAR(40) PATH 'Description', "ITEMNO" INTEGER PATH '@ItemNumber') li WHERE XMLExists('/PurchaseOrder[Reference="SBELL-2002100912333601PDT"]' PASSING OBJECT_VALUE); ``` # 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]
