Init

MARS_Packages/REL01/MARS-1049-ADHOC/rollback_mars1049_adhoc.sql

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+--=============================================================================================================================
+-- MARS-1049-ADHOC: Master Rollback Script
+--=============================================================================================================================
+-- Purpose: Rollback CSDB external tables encoding changes from WE8MSWIN1252 to UTF8
+-- Author: Grzegorz Michalski
+-- Date: 2025-11-26
+-- Related: MARS-1049 (CSV Encoding Support), MARS-821 (Original CSDB Setup)
+--
+-- Prerequisites:
+--   - FILE_MANAGER v3.2.1+ with pEncoding parameter support
+--   - FILE_MANAGER_ODS v2.1.0+ with pEncoding parameter support
+--   - Template tables exist in CT_ET_TEMPLATES schema
+--   - Proper bucket URIs configured in ENV_MANAGER
+--   - Execute as ODS user or with sufficient privileges
+--
+-- Rollback Sequence:
+--   Step 1: Rollback CSDB configurations to UTF8 encoding
+--   Step 2: Drop CSDB external tables with WE8MSWIN1252 encoding
+--   Step 3: Recreate CSDB external tables with UTF8 encoding (using MARS-821 patterns)
+--   Step 4: Verify all tables created successfully
+--
+-- Post-Rollback:
+--   - CSDB configurations restored to UTF8
+--   - External tables recreated with UTF8 encoding
+--   - System restored to pre-MARS-1049-ADHOC state
+--=============================================================================================================================
+
+SET SERVEROUTPUT ON
+SET ECHO ON
+SET VERIFY OFF
+
+-- ===================================================================
+-- MARS-1049-ADHOC ROLLBACK SCRIPT: Restore UTF8 Encoding for CSDB
+-- ===================================================================
+-- Purpose: Rollback CSDB external tables to UTF8 encoding
+-- Author: Grzegorz Michalski
+-- Date: 2025-11-26
+-- Version: 1.0.0
+
+-- Dynamic spool file generation (using SYS_CONTEXT - no DBA privileges required)
+var filename VARCHAR2(100)
+BEGIN
+    :filename := 'ROLLBACK_MARS_1049_ADHOC_' || SYS_CONTEXT('USERENV', 'CON_NAME') || '_' || TO_CHAR(SYSDATE,'YYYYMMDD_HH24MISS') || '.log';
+END;
+/
+column filename new_value _filename
+select :filename filename from dual;
+spool &_filename
+
+PROMPT =========================================================================
+PROMPT MARS-1049-ADHOC: Rollback to UTF8 Encoding
+PROMPT =========================================================================
+PROMPT 
+PROMPT This script will:
+PROMPT - Rollback CSDB configurations to UTF8 encoding
+PROMPT - Drop existing CSDB external tables (WE8MSWIN1252)
+PROMPT - Recreate 18 CSDB external tables with UTF8 encoding
+PROMPT - Verify successful rollback
+PROMPT 
+PROMPT Expected Duration: 2-3 minutes
+PROMPT =========================================================================
+
+PROMPT 
+PROMPT =========================================================================
+PROMPT Step 1: Rollback CSDB Encoding Configuration to UTF8
+PROMPT =========================================================================
+@@91_MARS_1049_ADHOC_rollback_encoding.sql
+
+PROMPT 
+PROMPT =========================================================================
+PROMPT Step 2: Drop Existing CSDB External Tables
+PROMPT =========================================================================
+@@01_MARS_1049_ADHOC_drop_external_tables.sql
+
+PROMPT 
+PROMPT =========================================================================
+PROMPT Step 3: Recreate CSDB External Tables with UTF8 Encoding
+PROMPT =========================================================================
+@@92_MARS_1049_ADHOC_recreate_tables_utf8.sql
+
+PROMPT 
+PROMPT =========================================================================
+PROMPT Step 4: Verify External Tables Creation
+PROMPT =========================================================================
+@@03_MARS_1049_ADHOC_verify_external_tables.sql
+
+PROMPT 
+PROMPT =========================================================================
+PROMPT MARS-1049-ADHOC Rollback - COMPLETED
+PROMPT =========================================================================
+PROMPT Check the log file for complete rollback details.
+PROMPT =========================================================================
+
+spool off
+
+PROMPT 
+PROMPT =========================================================================
+PROMPT MARS-1049-ADHOC Rollback Complete
+PROMPT =========================================================================
+PROMPT 
+PROMPT All CSDB external tables have been restored to UTF8 encoding.
+PROMPT System returned to pre-MARS-1049-ADHOC state.
+PROMPT 
+PROMPT =========================================================================
+
+quit;