When records are updated or deleted, the changed information is stored in new files, and the files for a given record are retrieved during an operation, which is then reconciled by the open table format software. In general, open table formats implement these features by storing multiple versions of a single record across many underlying files, and use a tracking and indexing mechanism that allows an analytics engine to see or modify the correct version of the records they are accessing. Time travel – Enabling you to query data as of a point in time in the past. ![]() Schema evolution – Allowing for columns of a table to be added or modified over the life of a table.Concurrency control – Allowing for multiple processes to read and write the same data at the same time. ![]()
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