работа ворошиловского моста ростов на дону на выезд
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работа ворошиловского моста ростов на дону на выезд, Transactions and optimistic concurrency control, , , , , , .
Optimistic concurrency control allows you to prevent lost updates and deletes. Concurrent, conflicting operations are subjected to the regular pessimistic locking of the database engine hosted by the logical partition that owns the item. When two concurrent operations attempt to update the latest version of an item within a logical partition, one of them will win and the other will fail. However, if one or two operations attempting to concurrently update the same item had previously read an older value of the item, the database doesn’t know if the previously read value by either or both the conflicting operations was indeed the latest value of the item. Fortunately, this situation can be detected with the Optimistic Concurrency Control (OCC) before letting the two operations enter the transaction boundary inside the database engine. OCC protects your data from accidentally overwriting changes that were made by others. It also prevents others from accidentally overwriting your own changes., Multi-item transactions. Azure Cosmos DB allows you to write stored procedures, pre/post triggers, user-defined-functions (UDFs) and merge procedures in JavaScript. Azure Cosmos DB natively supports JavaScript execution inside its database engine. You can register stored procedures, pre/post triggers, user-defined-functions (UDFs) and merge procedures on a container and later execute them , .
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