feat(cleanup): add advisor objects, scheduler log cleanup and datafile resize

Add cleanup for WRI$_ADV_* tables (can accumulate millions of rows/GBs),
scheduler$_event_log truncate, and automatic UNDO/SYSAUX datafile resize
with progressive fallback (2G→4G→6G). Tested on Oracle 18c XE.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clienti/oracle-xe-21c/import/cleanup_audit.sql

@@ -4,6 +4,8 @@
 -- Compatibil cu: Oracle 11g XE, 12c, 18c XE, 21c XE
 -- Compatibil cu: non-CDB si CDB/PDB
 -- Scop: Curata audit trail din SYSAUX + dezactiveaza auditurile
+--        + curata advisor objects + scheduler log
+--        + resize UNDO si SYSAUX datafiles
 -- Rulat ca: SYS AS SYSDBA
 --   - non-CDB: sqlplus / as sysdba
 --   - CDB/PDB: conectat la PDB (ALTER SESSION SET CONTAINER = XEPDB1)
@@ -17,7 +19,10 @@
 --   3. Curata audit trail-urile existente
 --   4. Configureaza auto-purge pentru siguranta
 --   5. Dezactiveaza auto tasks care umfla SYSAUX
---   6. Verifica rezultatul
+--   6. Curata SQL Advisor objects (WRI$_ADV_*) - pot ocupa GB
+--   7. Curata scheduler event log
+--   8. Resize UNDO si SYSAUX datafiles
+--   9. Verifica rezultatul
 -- ============================================================
 
 SET SERVEROUTPUT ON SIZE UNLIMITED
@@ -34,6 +39,11 @@ DECLARE
     v_count       NUMBER;
     v_aud_size_mb NUMBER := 0;
     v_sysaux_mb   NUMBER := 0;
+    v_undo_file   VARCHAR2(512);
+    v_undo_mb     NUMBER;
+    v_sysaux_file VARCHAR2(512);
+    v_sysaux_df   NUMBER;
+    v_hwm         NUMBER;
 
     -- Helper: executa SQL si ignora erori
     PROCEDURE exec_ignore(p_sql VARCHAR2) IS
@@ -291,11 +301,34 @@ BEGIN
     exec_log('TRUNCATE TABLE sys.wri$_sqlset_references',  'TRUNCATE wri$_sqlset_references');
     exec_log('TRUNCATE TABLE sys.wri$_sqlset_definitions', 'TRUNCATE wri$_sqlset_definitions');
 
-    -- Cleanup advisor tasks + stats
+    -- Cleanup stats + recyclebin
-    exec_log('BEGIN DBMS_ADVISOR.DELETE_EXPIRED_TASKS; END;', 'Delete expired advisor tasks');
     exec_log('BEGIN DBMS_STATS.PURGE_STATS(SYSDATE - 7); END;', 'Purge stats older than 7 days');
     exec_log('PURGE DBA_RECYCLEBIN', 'Purge recyclebin');
 
+    -- =========================================================
+    -- PASUL 5b: CLEANUP SQL ADVISOR OBJECTS (WRI$_ADV_*)
+    -- =========================================================
+    -- WRI$_ADV_OBJECTS poate acumula milioane de randuri (GB)
+    -- Sunt doar recomandari de tuning, nu date de productie
+    DBMS_OUTPUT.PUT_LINE(' ');
+    DBMS_OUTPUT.PUT_LINE('[PASUL 5b] Cleanup SQL Advisor objects...');
+
+    -- Truncate in ordinea corecta (foreign keys)
+    exec_log('TRUNCATE TABLE sys.wri$_adv_actions',         'TRUNCATE wri$_adv_actions');
+    exec_log('TRUNCATE TABLE sys.wri$_adv_findings',        'TRUNCATE wri$_adv_findings');
+    exec_log('TRUNCATE TABLE sys.wri$_adv_recommendations', 'TRUNCATE wri$_adv_recommendations');
+    exec_log('TRUNCATE TABLE sys.wri$_adv_rationale',       'TRUNCATE wri$_adv_rationale');
+    exec_log('TRUNCATE TABLE sys.wri$_adv_journal',         'TRUNCATE wri$_adv_journal');
+    exec_log('TRUNCATE TABLE sys.wri$_adv_objects',         'TRUNCATE wri$_adv_objects');
+
+    -- =========================================================
+    -- PASUL 5c: CLEANUP SCHEDULER EVENT LOG
+    -- =========================================================
+    DBMS_OUTPUT.PUT_LINE(' ');
+    DBMS_OUTPUT.PUT_LINE('[PASUL 5c] Cleanup scheduler event log...');
+
+    exec_log('TRUNCATE TABLE sys.scheduler$_event_log', 'TRUNCATE scheduler$_event_log');
+
     -- =========================================================
     -- PASUL 6: DEZACTIVARE AUTO TASKS
     -- =========================================================
@@ -357,6 +390,86 @@ BEGIN
         exec_log('GRANT EXECUTE ON SYS.DBMS_LOCK TO CONTAFIN_ORACLE', 'GRANT DBMS_LOCK TO CONTAFIN_ORACLE');
     END IF;
 
+    -- =========================================================
+    -- PASUL 9: RESIZE UNDO DATAFILE
+    -- =========================================================
+    -- UNDO poate creste foarte mult dupa import-uri bulk
+    -- undo_retention=900 (15 min) e suficient pentru XE
+    DBMS_OUTPUT.PUT_LINE(' ');
+    DBMS_OUTPUT.PUT_LINE('[PASUL 9] Resize UNDO datafile...');
+
+    exec_log('ALTER SYSTEM SET undo_retention = 900', 'undo_retention = 900');
+
+    BEGIN
+        SELECT file_name, ROUND(bytes/1024/1024)
+        INTO v_undo_file, v_undo_mb
+        FROM dba_data_files
+        WHERE tablespace_name = 'UNDOTBS1'
+        AND ROWNUM = 1;
+
+        DBMS_OUTPUT.PUT_LINE('  UNDO datafile: ' || v_undo_file || ' (' || v_undo_mb || ' MB)');
+
+        IF v_undo_mb > 2048 THEN
+            -- Incearca resize la 2 GB, apoi 4 GB, apoi 6 GB
+            BEGIN
+                EXECUTE IMMEDIATE 'ALTER DATABASE DATAFILE ''' || v_undo_file || ''' RESIZE 2G';
+                DBMS_OUTPUT.PUT_LINE('  [OK] UNDO resize la 2 GB');
+            EXCEPTION WHEN OTHERS THEN
+                BEGIN
+                    EXECUTE IMMEDIATE 'ALTER DATABASE DATAFILE ''' || v_undo_file || ''' RESIZE 4G';
+                    DBMS_OUTPUT.PUT_LINE('  [OK] UNDO resize la 4 GB');
+                EXCEPTION WHEN OTHERS THEN
+                    BEGIN
+                        EXECUTE IMMEDIATE 'ALTER DATABASE DATAFILE ''' || v_undo_file || ''' RESIZE 6G';
+                        DBMS_OUTPUT.PUT_LINE('  [OK] UNDO resize la 6 GB');
+                    EXCEPTION WHEN OTHERS THEN
+                        DBMS_OUTPUT.PUT_LINE('  [SKIP] UNDO resize: ' || SUBSTR(SQLERRM, 1, 150));
+                    END;
+                END;
+            END;
+        ELSE
+            DBMS_OUTPUT.PUT_LINE('  [OK] UNDO deja <= 2 GB, skip resize');
+        END IF;
+    END;
+
+    -- =========================================================
+    -- PASUL 10: RESIZE SYSAUX DATAFILE
+    -- =========================================================
+    DBMS_OUTPUT.PUT_LINE(' ');
+    DBMS_OUTPUT.PUT_LINE('[PASUL 10] Resize SYSAUX datafile...');
+
+    BEGIN
+        SELECT file_name, ROUND(bytes/1024/1024)
+        INTO v_sysaux_file, v_sysaux_df
+        FROM dba_data_files
+        WHERE tablespace_name = 'SYSAUX'
+        AND ROWNUM = 1;
+
+        -- Calculeaza high water mark
+        SELECT CEIL(MAX(block_id + blocks) * 8192 / 1024 / 1024)
+        INTO v_hwm
+        FROM dba_extents
+        WHERE tablespace_name = 'SYSAUX';
+
+        DBMS_OUTPUT.PUT_LINE('  SYSAUX datafile: ' || v_sysaux_file || ' (' || v_sysaux_df || ' MB)');
+        DBMS_OUTPUT.PUT_LINE('  SYSAUX HWM: ' || v_hwm || ' MB');
+
+        -- Resize doar daca putem recupera cel putin 500 MB
+        IF v_sysaux_df - v_hwm > 500 THEN
+            BEGIN
+                EXECUTE IMMEDIATE 'ALTER DATABASE DATAFILE ''' || v_sysaux_file
+                    || ''' RESIZE ' || (v_hwm + 100) || 'M';
+                DBMS_OUTPUT.PUT_LINE('  [OK] SYSAUX resize la ' || (v_hwm + 100) || ' MB');
+            EXCEPTION WHEN OTHERS THEN
+                DBMS_OUTPUT.PUT_LINE('  [SKIP] SYSAUX resize: ' || SUBSTR(SQLERRM, 1, 150));
+                DBMS_OUTPUT.PUT_LINE('  [INFO] HWM prea aproape de dim. curenta, spatiul se va reutiliza');
+            END;
+        ELSE
+            DBMS_OUTPUT.PUT_LINE('  [SKIP] Diferenta < 500 MB, nu merita resize');
+            DBMS_OUTPUT.PUT_LINE('  [INFO] Spatiul liber din SYSAUX se va reutiliza automat');
+        END IF;
+    END;
+
     -- =========================================================
     -- VERIFICARE FINALA
     -- =========================================================