MySQL CDC to BigQuery: what periodic syncs miss, and how binlog avoids it

MySQL Change Data Capture (CDC) using binary logs provides superior data integrity compared to traditional periodic batch syncs, capturing all deletes and intermediate updates in order rather than relying on snapshot comparisons that miss critical changes and strain production databases. Organizations must configure specific MySQL prerequisites—including ROW format binlog with FULL images, proper replication privileges, and adequate binlog retention—to ensure reliable data pipelines to BigQuery, with managed platforms reducing implementation complexity. The strategic shift from "how do we make this faster" to "what are we currently unable to see" is critical for data-driven decision-making, as incomplete data arriving on schedule creates greater business risk than occasional latency with guaranteed accuracy.