[GitHub] [shardingsphere] FlyingZC opened a new issue, #27160: Support parsing Oracle SET SERVEROUTPUT sql

["FlyingZC (via GitHub)" <gi...@apache.org>]

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


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[GitHub] [shardingsphere] FlyingZC commented on issue #27160: Support parsing Oracle SET SERVEROUTPUT sql

["FlyingZC (via GitHub)" <gi...@apache.org>]

FlyingZC commented on issue #27160:
URL: https://github.com/apache/shardingsphere/issues/27160#issuecomment-1665225865

   Close the issue, `SET SERVEROUTPUT` can only be executed in `sqlplus`.


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[GitHub] [shardingsphere] FlyingZC closed issue #27160: Support parsing Oracle SET SERVEROUTPUT sql

["FlyingZC (via GitHub)" <gi...@apache.org>]

FlyingZC closed issue #27160: Support parsing Oracle SET SERVEROUTPUT sql
URL: https://github.com/apache/shardingsphere/issues/27160


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