2026-03-12 21:01:38

2026-03-12 22:01:38 +01:00
parent 3bd1db26cc
commit 26296b6d6a
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+created: 20190623003755119
+creator: vplesnila
+modified: 20190906141112050
+modifier: vplesnila
+tags: Oracle
+title: SQL Baseline from AWR
+type: text/plain
+
+-- Création d'un SQL baseline à partir du AWR
+---------------------------------------------
+
+
+-- Création d'un SQLSET
+---------------------
+BEGIN
+  DBMS_SQLTUNE.DROP_SQLSET(
+    sqlset_name => 'MySTS01');
+END;
+/
+BEGIN
+  DBMS_SQLTUNE.CREATE_SQLSET(
+    sqlset_name => 'MySTS01',
+    description => 'SQL Tuning Set for loading plan into SQL Plan Baseline');
+END;
+/
+
+
+-- Dans le SQLSET=MySTS01 créé précédemment, nous chargons l'historique du SQL_ID=d1khdngkga3nm 
+-- entre les snapshot AWR 50947 et 50951
+DECLARE
+  cur sys_refcursor;
+BEGIN
+  OPEN cur FOR
+    SELECT VALUE(P)
+    FROM TABLE(
+       dbms_sqltune.select_workload_repository(
+          begin_snap=>50947, 
+          end_snap=>50951,
+          basic_filter=>'sql_id = ''d1khdngkga3nm''',
+          attribute_list=>'ALL')
+        ) p;
+     DBMS_SQLTUNE.LOAD_SQLSET( sqlset_name=> 'MySTS01', populate_cursor=>cur);
+  CLOSE cur;
+END;
+/
+
+-- Pour voir ce que contient le SQLSET=MySTS01
+-----------------------------------------------
+SELECT
+  buffer_gets              ,
+  optimizer_cost           ,
+  plan_hash_value          ,
+  sql_id                   
+   FROM TABLE(DBMS_SQLTUNE.SELECT_SQLSET(sqlset_name => 'MySTS01')
+             )
+/
+
+
+-- On crée un SQL Baseline à partir du plan_hash_value=473902782 du SQLSET=MySTS01
+----------------------------------------------------------------------------------
+DECLARE
+my_plans pls_integer;
+BEGIN
+  my_plans := DBMS_SPM.LOAD_PLANS_FROM_SQLSET(
+    sqlset_name => 'MySTS01',
+    basic_filter=>'plan_hash_value = ''473902782'''
+    );
+END;
+/
+
+
+-- Liste des SQL baseslines
+----------------------------
+set lines 180 pages 999
+col created for a20 trunc
+col signature for 9999999999999999999
+
+select signature, sql_handle, plan_name, enabled, accepted, fixed, origin,created 
+from   dba_sql_plan_baselines;
+
+
+-- Pour fixer un SQL basesline
+------------------------------
+begin   dbms_output.put_line(dbms_spm.ALTER_SQL_PLAN_BASELINE(plan_name=>'SQL_PLAN_8uy4magb69vtuf8f30e4c',attribute_name=>'fixed',attribute_value=>'yes'));
+end;
+/
+
+
+-- Obtenir le PLAN_ID et le OUTLINE d'un SQL basesline
+-- A partir de la SIGNATURE=9005682359107037619 du SQL Baseline, nous retrouvons le PLAN_ID
+-------------------------------------------------------------------------------------------
+SELECT TO_CHAR(so.signature) signature
+  ,      so.plan_id
+  ,      DECODE(ad.origin, 1, 'MANUAL-LOAD',
+                        2, 'AUTO-CAPTURE',
+                        3, 'MANUAL-SQLTUNE',
+                        4, 'AUTO-SQLTUNE',
+                        5, 'STORED-OUTLINE',
+                           'UNKNOWN') origin
+  ,      DECODE(BITAND(so.flags, 1), 1, 'YES', 'NO') enabled
+  ,      DECODE(BITAND(so.flags, 2), 2, 'YES', 'NO') accepted
+  ,      DECODE(BITAND(so.flags, 64), 64, 'NO', 'YES') reproduced
+  FROM   sys.sqlobj$        so
+  ,      sys.sqlobj$auxdata ad
+  WHERE  ad.signature = so.signature
+    AND    ad.plan_id   = so.plan_id
+    AND    so.signature = 9005682359107037619;
+
+
+-- Pour obtenir le OUTLINE du SQL Baseline, il nous faut connaître 
+-- la SIGNATURE=9005682359107037619 et le PLAN_ID=263533726
+------------------------------------------------------------------
+select cast(extractvalue(value(x), '/hint') as varchar2(500)) as outline_hints 
+    from   xmltable('/outline_data/hint' 
+           passing (select xmltype(comp_data) xml 
+                    from   sys.sqlobj$data 
+                    where  signature = 9005682359107037619
+                    and    plan_id   = 263533726)) x;  
+
+                    
+
+-- Supression du SQL Baseline ayant le SQL_HANDLE=SQL_7cfa9c643693a9b3 et 
+-- le PLAN_NAME=SQL_PLAN_7tynwchv97admdbd90e8e
+-------------------------------------------------------------------------
+set serveroutput ON
+DECLARE
+  v_dropped_plans number;
+BEGIN
+  v_dropped_plans := DBMS_SPM.DROP_SQL_PLAN_BASELINE (
+     sql_handle => 'SQL_7cfa9c643693a9b3',
+     plan_name=>'SQL_PLAN_7tynwchv97admdbd90e8e'
+);
+  DBMS_OUTPUT.PUT_LINE('dropped ' || v_dropped_plans || ' plans');
+END;
+/  
+
+      
+-- Afficher le plan d'exécution d'un SQL basesline
+-- Dans notre exemple, le SQL Baseline a le SQL_HANDLE=SQL_24c0db16ff852641
+------------------------------------------------------------------------------
+set lines 200 pages 0
+select * from table(DBMS_XPLAN.DISPLAY_SQL_PLAN_BASELINE('SQL_24c0db16ff852641'));