Sling Offers Two CDC Modes for Database Syncing: When Each One Fits

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Sling, a data integration tool, provides two methods for syncing operational databases to data warehouses: query-based incremental replication and log-based change data capture (CDC). Query-based incremental mode polls the source table on a schedule, pulling only rows updated since the last run, but cannot detect deletions because deleted rows no longer appear in query results. Log-based CDC reads the database transaction log directly, capturing inserts, updates, and deletes, making it suitable for workloads where deleted records must also be reflected in the warehouse. The two modes are configured through a replication file, with incremental mode available for free and CDC requiring a paid CLI Pro Max token or Advanced Platform plan. Choosing between them depends on whether a pipeline needs to track deletions, with query-based being simpler to set up and log-based offering more complete change visibility.

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