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Module mutation

Module mutation 

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Columnar mutation engine: coordinates PK index, delete bitmaps, memtable, and WAL records for full INSERT/UPDATE/DELETE.

The MutationEngine is the single point of coordination for all columnar write operations. It produces WAL records that must be persisted before the mutation is considered durable.

Structsยง

MutationEngine
Coordinates all columnar mutations for a single collection.
MutationResult
Result of a mutation operation, including the WAL record to persist.