Merge operation diagram illustrating how old and new log entries combine with deduplication logic based on work type presence in source journals. The diagram shows step-by-step transformation where duplicate entries (marked as collapsible or non-collapsible) are filtered during the merge process. This pattern is essential for maintaining data integrity when consolidating historical and incremental logs without introducing redundant records. Fork this diagram on Diagrams.so to customize merge rules, add conditional logic branches, or adapt it for your specific ETL pipeline requirements.