34c0c64d9d
Add user-facing documentation for the new CQL per-row TTL feature, in docs/cql/cql-extensions.md. Also mention (and link) the new alternative TTL feature in a few relevant documents about the old (per-write) TTL, about CDC, and about the CREATE TABLE and ALTER TABLE commands. Signed-off-by: Nadav Har'El <nyh@scylladb.com>
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ReStructuredText
25 lines
1020 B
ReStructuredText
=======================
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Basic operations in CDC
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=======================
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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:
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* inserts,
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* updates,
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* single row deletions,
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* row range deletions,
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* partition deletions.
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Note that TTL expirations are not operations, and not reflected in the CDC
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log tables. If you do need CDC events when entire rows expire, consider
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using `per-row TTL <https://docs.scylladb.com/stable/cql/cql-extensions.html#per-row-ttl>`_
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which does generate special CDC events when rows expire.
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The following sections describe how each of these operations are handled by the CDC log.
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.. include:: /features/cdc/_common/cdc-updates.rst
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.. include:: /features/cdc/_common/cdc-inserts.rst
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.. include:: /features/cdc/_common/cdc-row-deletions.rst
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.. include:: /features/cdc/_common/cdc-row-range-deletions.rst
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.. include:: /features/cdc/_common/cdc-partition-deletions.rst
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