======================= Basic operations in CDC

The CDC log table reflects operations that are performed on the base table. Different types of operations give different corresponding entries in the CDC log. These operations are:

• inserts,
• updates,
• single row deletions,
• row range deletions,
• partition deletions.

Note that TTL expirations are not operations, and not reflected in the CDC log tables. If you do need CDC events when entire rows expire, consider using per-row TTL <https://docs.scylladb.com/stable/cql/cql-extensions.html#per-row-ttl>_ which does generate special CDC events when rows expire.

The following sections describe how each of these operations are handled by the CDC log.

.. include:: /features/cdc/_common/cdc-updates.rst .. include:: /features/cdc/_common/cdc-inserts.rst .. include:: /features/cdc/_common/cdc-row-deletions.rst .. include:: /features/cdc/_common/cdc-row-range-deletions.rst .. include:: /features/cdc/_common/cdc-partition-deletions.rst