2026-03-12 20:23:15

csierra/cs_spbl_refresh.sql

@@ -0,0 +1,72 @@
+DEF 1 = 'C##IOD';
+VAR plans_to_refresh_limit NUMBER;
+EXEC :plans_to_refresh_limit := 1000;
+--
+WITH
+candidate_sql AS (
+SELECT  /*+ MATERIALIZE NO_MERGE */
+        DISTINCT s.con_id, s.exact_matching_signature AS signature, s.sql_id, s.plan_hash_value, s.sql_plan_baseline AS plan_name, s.sql_text
+FROM    v$sql s
+WHERE   s.sql_plan_baseline IS NOT NULL -- a baseline exists and it is in use
+AND     s.parsing_user_id > 0 -- exclude SYS
+AND     s.parsing_schema_id > 0 -- exclude SYS
+AND     s.parsing_schema_name NOT IN ('SYS', 'SYSTEM', 'MDSYS', 'ORDDATA', 'CTXSYS', 'WMSYS', 'DVSYS', 'XDB', 'LBACSYS', 'DBSNMP', 'GSMADMIN_INTERNAL') -- to reduce selection
+AND     s.parsing_schema_name NOT LIKE 'C##%' -- to reduce selection
+AND     s.parsing_schema_name NOT LIKE 'APEX%' -- to reduce selection
+AND     s.plan_hash_value > 0 -- e.g.: PL/SQL has 0 on PHV
+AND     s.exact_matching_signature > 0 -- INSERT from values has 0 on signature
+AND     s.executions > 0
+AND     s.cpu_time > 0
+AND     s.buffer_gets > 0
+AND     s.buffer_gets > s.executions
+AND     s.object_status = 'VALID'
+AND     s.is_obsolete = 'N'
+AND     s.is_shareable = 'Y'
+AND     s.is_bind_aware = 'N' -- to ignore cursors using adaptive cursor sharing ACS as per CHANGE-190522
+AND     s.is_resolved_adaptive_plan IS NULL -- to ignore adaptive plans which cause trouble when combined with SPM
+AND     s.is_reoptimizable = 'N' -- to ignore cursors which require adjustments as per cardinality feedback  
+AND     s.last_active_time > SYSDATE - (3/24) -- cursors has been executed within the last few hours
+-- AND     NOT EXISTS (SELECT NULL FROM &&1..zapper_ignore_sql_text i WHERE UPPER(s.sql_text) LIKE UPPER('%'||i.sql_text||'%'))
+AND     ROWNUM >= 1 /* MATERIALIZE NO_MERGE */
+),
+candidate_baselines AS (
+SELECT /*+ MATERIALIZE NO_MERGE OPT_PARAM('_px_cdb_view_enabled' 'FALSE') */
+       DISTINCT
+       b.con_id,
+       b.created, 
+       b.last_modified,
+       b.signature,
+       b.plan_name,
+       b.description
+  FROM cdb_sql_plan_baselines b
+ WHERE b.enabled = 'YES'
+   AND b.accepted = 'YES'
+   AND b.created < SYSDATE - 60 -- only consider refreshing baselines older than these many days
+   AND b.last_executed > SYSDATE - 7 -- only refresh a baseline if it has been executed during the last 7 days
+   AND b.parsing_schema_name NOT IN ('SYS', 'SYSTEM', 'MDSYS', 'ORDDATA', 'CTXSYS', 'WMSYS', 'DVSYS', 'XDB', 'LBACSYS', 'DBSNMP', 'GSMADMIN_INTERNAL') -- to reduce selection
+   AND b.parsing_schema_name NOT LIKE 'C##%' -- to reduce selection
+   AND b.parsing_schema_name NOT LIKE 'APEX%' -- to reduce selection
+   AND  ROWNUM >= 1 /* MATERIALIZE NO_MERGE */
+)
+SELECT s.sql_id,
+       c.name AS pdb_name,
+       s.signature,
+       s.plan_hash_value,
+       s.plan_name,
+       s.sql_text,
+       b.created, 
+       b.last_modified,
+       b.description
+  FROM candidate_sql s,
+       candidate_baselines b,
+       v$containers c
+ WHERE b.con_id = s.con_id
+   AND b.signature = s.signature
+   AND b.plan_name = s.plan_name
+   AND c.con_id = s.con_id
+ ORDER BY
+       b.created,
+       b.last_modified
+ FETCH FIRST :plans_to_refresh_limit ROWS ONLY
+/
+