The RECOVER statement represents comprehensive system recovery and sophisticated error recovery capabilities within COBOL programming environments, providing advanced fault tolerance mechanisms for enterprise applications, enhanced checkpoint restoration features, and intelligent recovery processing workflows that enable precise system state restoration, complex transaction recovery operations, and systematic disaster recovery architectures. This statement embodies modern fault tolerance principles by supporting comprehensive checkpoint recovery, enabling sophisticated error recovery protocols, and facilitating precise system restoration requirements while maintaining data integrity, ensuring reliable recovery patterns, and enabling flexible fault tolerance architectures across enterprise applications requiring exact state restoration, system continuity capabilities, and reliable recovery processing throughout sophisticated business critical scenarios and high-availability system recovery workflows.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596*> Basic RECOVER statement formats RECOVER checkpoint-name [ON EXCEPTION imperative-statements] [NOT ON EXCEPTION imperative-statements] END-RECOVER *> Database recovery operations RECOVER DATABASE database-name TO checkpoint-identifier [WITH ROLLBACK] [ON EXCEPTION error-handling] END-RECOVER *> Transaction recovery RECOVER TRANSACTION transaction-id FROM checkpoint-point [PRESERVING current-state] [ON EXCEPTION recovery-error-handler] END-RECOVER *> System state recovery examples 01 WS-RECOVERY-CONTROL. 05 WS-CHECKPOINT-NAME PIC X(16). 05 WS-RECOVERY-STATUS PIC X(2). 05 WS-RECOVERY-TYPE PIC X(12). 05 WS-ERROR-CODE PIC 9(4). *> Simple checkpoint recovery MOVE "CHECKPOINT001" TO WS-CHECKPOINT-NAME RECOVER WS-CHECKPOINT-NAME ON EXCEPTION MOVE "ER" TO WS-RECOVERY-STATUS DISPLAY "Recovery failed for checkpoint: " WS-CHECKPOINT-NAME PERFORM HANDLE-RECOVERY-ERROR NOT ON EXCEPTION MOVE "OK" TO WS-RECOVERY-STATUS DISPLAY "Successfully recovered from: " WS-CHECKPOINT-NAME PERFORM CONTINUE-PROCESSING END-RECOVER *> Database recovery with rollback 01 WS-DATABASE-RECOVERY. 05 WS-DB-NAME PIC X(8) VALUE "CUSTDB". 05 WS-CHECKPOINT-ID PIC X(20). 05 WS-ROLLBACK-FLAG PIC X VALUE 'Y'. RECOVER DATABASE WS-DB-NAME TO WS-CHECKPOINT-ID WITH ROLLBACK ON EXCEPTION DISPLAY "Database recovery failed: " WS-DB-NAME DISPLAY "Checkpoint ID: " WS-CHECKPOINT-ID PERFORM DATABASE-RECOVERY-ERROR NOT ON EXCEPTION DISPLAY "Database recovered successfully" DISPLAY "Data integrity restored to checkpoint" PERFORM RESUME-DATABASE-OPERATIONS END-RECOVER *> File system recovery 01 WS-FILE-RECOVERY. 05 WS-FILE-CHECKPOINT PIC X(24). 05 WS-FILE-POSITION PIC 9(8). 05 WS-RECOVERY-MODE PIC X(8). MOVE "FILE_CHECKPOINT_20231201_143000" TO WS-FILE-CHECKPOINT MOVE "PARTIAL" TO WS-RECOVERY-MODE RECOVER FILE-SYSTEM FROM WS-FILE-CHECKPOINT MODE WS-RECOVERY-MODE POSITION WS-FILE-POSITION ON EXCEPTION DISPLAY "File system recovery failed" PERFORM FILE-RECOVERY-HANDLING NOT ON EXCEPTION DISPLAY "File system restored to position: " WS-FILE-POSITION PERFORM CONTINUE-FILE-PROCESSING END-RECOVER *> Transaction recovery with preservation 01 WS-TRANSACTION-RECOVERY. 05 WS-TRANS-ID PIC X(16). 05 WS-PRESERVE-MODE PIC X(8) VALUE "CURRENT". 05 WS-RECOVERY-POINT PIC X(32). RECOVER TRANSACTION WS-TRANS-ID FROM WS-RECOVERY-POINT PRESERVING WS-PRESERVE-MODE ON EXCEPTION DISPLAY "Transaction recovery failed: " WS-TRANS-ID PERFORM TRANSACTION-RECOVERY-ERROR NOT ON EXCEPTION DISPLAY "Transaction state restored: " WS-TRANS-ID PERFORM RESUME-TRANSACTION-PROCESSING END-RECOVER
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463IDENTIFICATION DIVISION. PROGRAM-ID. RECOVER-DEMO. DATA DIVISION. WORKING-STORAGE SECTION. *> Recovery management structures 01 WS-RECOVERY-MANAGER. 05 WS-RECOVERY-ACTIVE PIC X VALUE 'N'. 05 WS-CHECKPOINT-TABLE OCCURS 10 TIMES INDEXED BY CP-IDX. 10 WS-CP-NAME PIC X(20). 10 WS-CP-TIMESTAMP PIC X(26). 10 WS-CP-STATUS PIC X(8). 10 WS-CP-DATA-SIZE PIC 9(8). 05 WS-ACTIVE-CHECKPOINTS PIC 9(2) VALUE 0. *> System state information 01 WS-SYSTEM-STATE. 05 WS-CURRENT-JOB-ID PIC X(8). 05 WS-CURRENT-STEP PIC 9(4). 05 WS-RECORDS-PROCESSED PIC 9(8). 05 WS-LAST-COMMIT-TIME PIC X(26). 05 WS-SYSTEM-STATUS PIC X(12). *> Database recovery structures 01 WS-DATABASE-RECOVERY. 05 WS-DB-CONNECTIONS OCCURS 5 TIMES. 10 WS-DB-NAME PIC X(8). 10 WS-DB-STATUS PIC X(8). 10 WS-DB-CHECKPOINT PIC X(32). 10 WS-DB-RECOVERY-MODE PIC X(12). 05 WS-ACTIVE-DATABASES PIC 9(1) VALUE 0. *> Transaction recovery tracking 01 WS-TRANSACTION-TRACKING. 05 WS-ACTIVE-TRANSACTIONS OCCURS 20 TIMES. 10 WS-TRANS-ID PIC X(16). 10 WS-TRANS-STATUS PIC X(12). 10 WS-TRANS-START PIC X(26). 10 WS-TRANS-CHECKPOINT PIC X(32). 10 WS-TRANS-RECOVERY-POINT PIC 9(8). 05 WS-TRANSACTION-COUNT PIC 9(2) VALUE 0. *> File processing recovery 01 WS-FILE-RECOVERY. 05 WS-FILE-CONTEXTS OCCURS 15 TIMES. 10 WS-FILE-NAME PIC X(32). 10 WS-FILE-POSITION PIC 9(12). 10 WS-FILE-STATUS PIC X(2). 10 WS-FILE-CHECKPOINT PIC X(24). 10 WS-LAST-RECORD-KEY PIC X(20). 05 WS-ACTIVE-FILES PIC 9(2) VALUE 0. *> Error and exception tracking 01 WS-ERROR-TRACKING. 05 WS-RECOVERY-ERRORS OCCURS 50 TIMES. 10 WS-ERROR-TYPE PIC X(16). 10 WS-ERROR-TIME PIC X(26). 10 WS-ERROR-DETAILS PIC X(100). 10 WS-RECOVERY-ACTION PIC X(50). 05 WS-ERROR-COUNT PIC 9(3) VALUE 0. *> Recovery statistics 01 WS-RECOVERY-STATS. 05 WS-RECOVERY-ATTEMPTS PIC 9(6) VALUE 0. 05 WS-SUCCESSFUL-RECOVERIES PIC 9(6) VALUE 0. 05 WS-FAILED-RECOVERIES PIC 9(4) VALUE 0. 05 WS-PARTIAL-RECOVERIES PIC 9(4) VALUE 0. 05 WS-TOTAL-DOWNTIME PIC 9(8) VALUE 0. *> Business data structures for recovery 01 WS-BUSINESS-DATA. 05 WS-CUSTOMER-PROCESSING. 10 WS-CUSTOMER-COUNT PIC 9(8) VALUE 0. 10 WS-LAST-CUSTOMER-ID PIC X(12). 10 WS-CUSTOMER-BATCH PIC 9(4). 05 WS-ORDER-PROCESSING. 10 WS-ORDER-COUNT PIC 9(8) VALUE 0. 10 WS-LAST-ORDER-ID PIC X(16). 10 WS-ORDER-TOTAL PIC 9(12)V99 VALUE 0. 05 WS-PAYMENT-PROCESSING. 10 WS-PAYMENT-COUNT PIC 9(8) VALUE 0. 10 WS-PAYMENT-TOTAL PIC 9(14)V99 VALUE 0. 10 WS-LAST-PAYMENT-ID PIC X(20). PROCEDURE DIVISION. MAIN-RECOVERY-DEMO. DISPLAY "=== COBOL RECOVER STATEMENT DEMONSTRATION ===" DISPLAY SPACES PERFORM INITIALIZE-RECOVERY-SYSTEM PERFORM DEMONSTRATE-CHECKPOINT-RECOVERY PERFORM DEMONSTRATE-DATABASE-RECOVERY PERFORM DEMONSTRATE-TRANSACTION-RECOVERY PERFORM DEMONSTRATE-FILE-RECOVERY PERFORM DEMONSTRATE-SYSTEM-RECOVERY PERFORM DEMONSTRATE-PARTIAL-RECOVERY PERFORM DISPLAY-RECOVERY-SUMMARY DISPLAY "=== RECOVERY DEMONSTRATION COMPLETE ===" STOP RUN. INITIALIZE-RECOVERY-SYSTEM. DISPLAY "=== INITIALIZING RECOVERY SYSTEM ===" DISPLAY SPACES DISPLAY "Setting up recovery infrastructure..." *> Initialize checkpoint table PERFORM VARYING CP-IDX FROM 1 BY 1 UNTIL CP-IDX > 10 MOVE SPACES TO WS-CP-NAME(CP-IDX) MOVE SPACES TO WS-CP-TIMESTAMP(CP-IDX) MOVE "INACTIVE" TO WS-CP-STATUS(CP-IDX) MOVE 0 TO WS-CP-DATA-SIZE(CP-IDX) END-PERFORM *> Setup sample checkpoints MOVE "CHECKPOINT_001" TO WS-CP-NAME(1) MOVE FUNCTION CURRENT-DATE TO WS-CP-TIMESTAMP(1) MOVE "ACTIVE" TO WS-CP-STATUS(1) MOVE 1024000 TO WS-CP-DATA-SIZE(1) MOVE "CHECKPOINT_002" TO WS-CP-NAME(2) MOVE FUNCTION CURRENT-DATE TO WS-CP-TIMESTAMP(2) MOVE "ACTIVE" TO WS-CP-STATUS(2) MOVE 2048000 TO WS-CP-DATA-SIZE(2) MOVE 2 TO WS-ACTIVE-CHECKPOINTS *> Initialize system state MOVE "JOB12345" TO WS-CURRENT-JOB-ID MOVE 15 TO WS-CURRENT-STEP MOVE 125000 TO WS-RECORDS-PROCESSED MOVE "PROCESSING" TO WS-SYSTEM-STATUS DISPLAY " ✓ Recovery system initialized" DISPLAY " ✓ " WS-ACTIVE-CHECKPOINTS " checkpoints available" DISPLAY " ✓ System state captured" DISPLAY SPACES. DEMONSTRATE-CHECKPOINT-RECOVERY. DISPLAY "=== CHECKPOINT RECOVERY OPERATIONS ===" DISPLAY SPACES DISPLAY "Testing checkpoint recovery scenarios..." *> Simulate system failure and recovery DISPLAY " Simulating system failure scenario..." MOVE "FAILED" TO WS-SYSTEM-STATUS *> Attempt recovery from latest checkpoint MOVE WS-CP-NAME(1) TO WS-CHECKPOINT-NAME RECOVER WS-CHECKPOINT-NAME ON EXCEPTION ADD 1 TO WS-FAILED-RECOVERIES DISPLAY " ❌ Checkpoint recovery failed: " WS-CHECKPOINT-NAME PERFORM LOG-RECOVERY-ERROR WITH "CHECKPOINT" "Recovery from checkpoint failed" PERFORM ATTEMPT-ALTERNATE-RECOVERY NOT ON EXCEPTION ADD 1 TO WS-SUCCESSFUL-RECOVERIES DISPLAY " ✅ Checkpoint recovery successful: " WS-CHECKPOINT-NAME DISPLAY " Data size restored: " WS-CP-DATA-SIZE(1) " bytes" DISPLAY " Recovery timestamp: " WS-CP-TIMESTAMP(1) MOVE "RECOVERED" TO WS-SYSTEM-STATUS PERFORM RESUME-FROM-CHECKPOINT END-RECOVER ADD 1 TO WS-RECOVERY-ATTEMPTS DISPLAY SPACES. ATTEMPT-ALTERNATE-RECOVERY. DISPLAY " Attempting recovery from alternate checkpoint..." *> Try second checkpoint MOVE WS-CP-NAME(2) TO WS-CHECKPOINT-NAME RECOVER WS-CHECKPOINT-NAME ON EXCEPTION DISPLAY " ❌ Alternate checkpoint also failed" PERFORM EMERGENCY-RECOVERY-PROCEDURE NOT ON EXCEPTION DISPLAY " ✅ Alternate checkpoint recovery successful" MOVE "RECOVERED" TO WS-SYSTEM-STATUS PERFORM RESUME-FROM-ALTERNATE-CHECKPOINT END-RECOVER. DEMONSTRATE-DATABASE-RECOVERY. DISPLAY "=== DATABASE RECOVERY OPERATIONS ===" DISPLAY SPACES DISPLAY "Processing database recovery scenarios..." *> Setup database contexts MOVE "CUSTDB01" TO WS-DB-NAME(1) MOVE "ACTIVE" TO WS-DB-STATUS(1) MOVE "DB_CHECKPOINT_20231201_143000" TO WS-DB-CHECKPOINT(1) MOVE "FULL" TO WS-DB-RECOVERY-MODE(1) MOVE "ORDERDB" TO WS-DB-NAME(2) MOVE "SUSPECT" TO WS-DB-STATUS(2) MOVE "DB_CHECKPOINT_20231201_142500" TO WS-DB-CHECKPOINT(2) MOVE "INCREMENTAL" TO WS-DB-RECOVERY-MODE(2) MOVE 2 TO WS-ACTIVE-DATABASES *> Recover first database RECOVER DATABASE WS-DB-NAME(1) TO WS-DB-CHECKPOINT(1) WITH ROLLBACK ON EXCEPTION DISPLAY " ❌ Database recovery failed: " WS-DB-NAME(1) MOVE "FAILED" TO WS-DB-STATUS(1) PERFORM DATABASE-RECOVERY-ERROR NOT ON EXCEPTION DISPLAY " ✅ Database recovery successful: " WS-DB-NAME(1) DISPLAY " Recovery mode: " WS-DB-RECOVERY-MODE(1) DISPLAY " Checkpoint: " WS-DB-CHECKPOINT(1) MOVE "RECOVERED" TO WS-DB-STATUS(1) PERFORM VERIFY-DATABASE-INTEGRITY END-RECOVER *> Recover second database with different mode RECOVER DATABASE WS-DB-NAME(2) TO WS-DB-CHECKPOINT(2) MODE WS-DB-RECOVERY-MODE(2) ON EXCEPTION DISPLAY " ❌ Incremental recovery failed: " WS-DB-NAME(2) PERFORM ATTEMPT-FULL-DATABASE-RECOVERY NOT ON EXCEPTION DISPLAY " ✅ Incremental recovery successful: " WS-DB-NAME(2) MOVE "RECOVERED" TO WS-DB-STATUS(2) END-RECOVER DISPLAY " Database recovery summary:" PERFORM VARYING CP-IDX FROM 1 BY 1 UNTIL CP-IDX > WS-ACTIVE-DATABASES DISPLAY " " WS-DB-NAME(CP-IDX) ": " WS-DB-STATUS(CP-IDX) END-PERFORM DISPLAY SPACES. DEMONSTRATE-TRANSACTION-RECOVERY. DISPLAY "=== TRANSACTION RECOVERY OPERATIONS ===" DISPLAY SPACES DISPLAY "Processing transaction recovery scenarios..." *> Setup transaction contexts MOVE "TXN_20231201_001" TO WS-TRANS-ID(1) MOVE "INCOMPLETE" TO WS-TRANS-STATUS(1) MOVE FUNCTION CURRENT-DATE TO WS-TRANS-START(1) MOVE "TXN_CHECKPOINT_001" TO WS-TRANS-CHECKPOINT(1) MOVE 5000 TO WS-TRANS-RECOVERY-POINT(1) MOVE "TXN_20231201_002" TO WS-TRANS-ID(2) MOVE "ABORTED" TO WS-TRANS-STATUS(2) MOVE FUNCTION CURRENT-DATE TO WS-TRANS-START(2) MOVE "TXN_CHECKPOINT_002" TO WS-TRANS-CHECKPOINT(2) MOVE 3500 TO WS-TRANS-RECOVERY-POINT(2) MOVE 2 TO WS-TRANSACTION-COUNT *> Recover first transaction RECOVER TRANSACTION WS-TRANS-ID(1) FROM WS-TRANS-CHECKPOINT(1) PRESERVING "CURRENT" ON EXCEPTION DISPLAY " ❌ Transaction recovery failed: " WS-TRANS-ID(1) MOVE "FAILED" TO WS-TRANS-STATUS(1) PERFORM TRANSACTION-RECOVERY-ERROR NOT ON EXCEPTION DISPLAY " ✅ Transaction recovery successful: " WS-TRANS-ID(1) DISPLAY " Recovery point: " WS-TRANS-RECOVERY-POINT(1) DISPLAY " Checkpoint: " WS-TRANS-CHECKPOINT(1) MOVE "RECOVERED" TO WS-TRANS-STATUS(1) PERFORM RESUME-TRANSACTION END-RECOVER *> Recover second transaction with rollback RECOVER TRANSACTION WS-TRANS-ID(2) FROM WS-TRANS-CHECKPOINT(2) WITH ROLLBACK ON EXCEPTION DISPLAY " ❌ Transaction rollback recovery failed: " WS-TRANS-ID(2) PERFORM ABANDON-TRANSACTION NOT ON EXCEPTION DISPLAY " ✅ Transaction rollback successful: " WS-TRANS-ID(2) MOVE "ROLLEDBACK" TO WS-TRANS-STATUS(2) END-RECOVER DISPLAY SPACES. DEMONSTRATE-FILE-RECOVERY. DISPLAY "=== FILE SYSTEM RECOVERY OPERATIONS ===" DISPLAY SPACES DISPLAY "Processing file recovery scenarios..." *> Setup file contexts MOVE "CUSTOMER.DAT" TO WS-FILE-NAME(1) MOVE 125000 TO WS-FILE-POSITION(1) MOVE "35" TO WS-FILE-STATUS(1) *> File not found MOVE "FILE_CP_20231201_143000" TO WS-FILE-CHECKPOINT(1) MOVE "CUST123456" TO WS-LAST-RECORD-KEY(1) MOVE "ORDERS.IDX" TO WS-FILE-NAME(2) MOVE 89500 TO WS-FILE-POSITION(2) MOVE "30" TO WS-FILE-STATUS(2) *> Permanent error MOVE "FILE_CP_20231201_142800" TO WS-FILE-CHECKPOINT(2) MOVE "ORD789012" TO WS-LAST-RECORD-KEY(2) MOVE 2 TO WS-ACTIVE-FILES *> Recover first file RECOVER FILE-SYSTEM FROM WS-FILE-CHECKPOINT(1) POSITION WS-FILE-POSITION(1) MODE "SEQUENTIAL" ON EXCEPTION DISPLAY " ❌ File recovery failed: " WS-FILE-NAME(1) DISPLAY " Position: " WS-FILE-POSITION(1) PERFORM FILE-RECOVERY-ERROR NOT ON EXCEPTION DISPLAY " ✅ File recovery successful: " WS-FILE-NAME(1) DISPLAY " Restored to position: " WS-FILE-POSITION(1) DISPLAY " Last key: " WS-LAST-RECORD-KEY(1) MOVE "00" TO WS-FILE-STATUS(1) PERFORM RESUME-FILE-PROCESSING END-RECOVER *> Recover indexed file RECOVER FILE-SYSTEM FROM WS-FILE-CHECKPOINT(2) MODE "INDEXED" KEY WS-LAST-RECORD-KEY(2) ON EXCEPTION DISPLAY " ❌ Indexed file recovery failed: " WS-FILE-NAME(2) PERFORM REBUILD-INDEX-FILE NOT ON EXCEPTION DISPLAY " ✅ Indexed file recovery successful: " WS-FILE-NAME(2) MOVE "00" TO WS-FILE-STATUS(2) END-RECOVER DISPLAY SPACES. DEMONSTRATE-SYSTEM-RECOVERY. DISPLAY "=== COMPLETE SYSTEM RECOVERY ===" DISPLAY SPACES DISPLAY "Performing comprehensive system recovery..." *> System-wide recovery operation RECOVER SYSTEM FROM "SYSTEM_CHECKPOINT_LATEST" WITH FULL-RESTORE ON EXCEPTION DISPLAY " ❌ System recovery failed" PERFORM EMERGENCY-SYSTEM-PROCEDURES NOT ON EXCEPTION DISPLAY " ✅ System recovery successful" PERFORM VERIFY-SYSTEM-INTEGRITY PERFORM RESUME-NORMAL-OPERATIONS END-RECOVER DISPLAY SPACES. DEMONSTRATE-PARTIAL-RECOVERY. DISPLAY "=== PARTIAL RECOVERY OPERATIONS ===" DISPLAY SPACES DISPLAY "Testing partial and selective recovery..." *> Selective component recovery RECOVER COMPONENTS LIST ("DATABASE", "FILES", "TRANSACTIONS") FROM "PARTIAL_CHECKPOINT_001" MODE "SELECTIVE" ON EXCEPTION DISPLAY " ❌ Partial recovery failed" ADD 1 TO WS-PARTIAL-RECOVERIES PERFORM ANALYZE-PARTIAL-FAILURE NOT ON EXCEPTION DISPLAY " ✅ Partial recovery successful" ADD 1 TO WS-PARTIAL-RECOVERIES PERFORM VERIFY-PARTIAL-RECOVERY END-RECOVER DISPLAY SPACES. DISPLAY-RECOVERY-SUMMARY. DISPLAY "=== RECOVERY OPERATIONS SUMMARY ===" DISPLAY SPACES DISPLAY "Recovery Statistics:" DISPLAY " 🔄 Total recovery attempts: " WS-RECOVERY-ATTEMPTS DISPLAY " ✅ Successful recoveries: " WS-SUCCESSFUL-RECOVERIES DISPLAY " ❌ Failed recoveries: " WS-FAILED-RECOVERIES DISPLAY " 🔀 Partial recoveries: " WS-PARTIAL-RECOVERIES DISPLAY " ⏱️ Total downtime: " WS-TOTAL-DOWNTIME " seconds" IF WS-RECOVERY-ATTEMPTS > 0 COMPUTE WS-CURRENT-STEP = (WS-SUCCESSFUL-RECOVERIES / WS-RECOVERY-ATTEMPTS) * 100 DISPLAY " 📊 Recovery success rate: " WS-CURRENT-STEP "%" END-IF DISPLAY " " DISPLAY "System Status Summary:" DISPLAY " 🖥️ System: " WS-SYSTEM-STATUS DISPLAY " 📊 Active checkpoints: " WS-ACTIVE-CHECKPOINTS DISPLAY " 🗄️ Active databases: " WS-ACTIVE-DATABASES DISPLAY " 📁 Active files: " WS-ACTIVE-FILES DISPLAY " 🔄 Active transactions: " WS-TRANSACTION-COUNT DISPLAY " " DISPLAY "RECOVER Features Demonstrated:" DISPLAY " ✓ Checkpoint recovery operations" DISPLAY " ✓ Database recovery with rollback" DISPLAY " ✓ Transaction recovery and restoration" DISPLAY " ✓ File system recovery mechanisms" DISPLAY " ✓ System-wide recovery operations" DISPLAY " ✓ Partial and selective recovery" DISPLAY " ✓ Error handling and alternatives" DISPLAY " ✓ Recovery verification procedures" DISPLAY SPACES. *> Recovery support procedures LOG-RECOVERY-ERROR. USING ERROR-TYPE-PARAM ERROR-DETAILS-PARAM. ADD 1 TO WS-ERROR-COUNT MOVE ERROR-TYPE-PARAM TO WS-ERROR-TYPE(WS-ERROR-COUNT) MOVE FUNCTION CURRENT-DATE TO WS-ERROR-TIME(WS-ERROR-COUNT) MOVE ERROR-DETAILS-PARAM TO WS-ERROR-DETAILS(WS-ERROR-COUNT) MOVE "LOGGED" TO WS-RECOVERY-ACTION(WS-ERROR-COUNT). RESUME-FROM-CHECKPOINT. DISPLAY " Resuming processing from checkpoint state" MOVE WS-RECORDS-PROCESSED TO WS-CUSTOMER-COUNT MOVE "RESUMED" TO WS-SYSTEM-STATUS. VERIFY-DATABASE-INTEGRITY. DISPLAY " Verifying database integrity..." DISPLAY " Database consistency checks passed". RESUME-TRANSACTION. DISPLAY " Resuming transaction processing" DISPLAY " Transaction state verified". RESUME-FILE-PROCESSING. DISPLAY " Resuming file processing operations" DISPLAY " File position and status verified". VERIFY-SYSTEM-INTEGRITY. DISPLAY " Performing system-wide integrity checks" DISPLAY " All system components verified". RESUME-NORMAL-OPERATIONS. DISPLAY " Returning to normal operational mode" MOVE "OPERATIONAL" TO WS-SYSTEM-STATUS.