![]() If there is an exception, theĪtomic blocks can be nested. If the block of code is successfully completed, theĬhanges are committed to the database. atomicĪllows us to create a block of code within which the atomicity on theĭatabase is guaranteed. atomic( using = None, savepoint = True, durable = False) ¶Ītomicity is the defining property of database transactions. If the BEGIN IMMEDIATE operation succeeds, then no subsequent operations in that transaction will ever fail with an SQLITE_BUSY error.Django provides a single API to control database transactions. The BEGIN IMMEDIATE command goes ahead and starts a write transaction, and thus blocks all other writers. If X starts a transaction that will initially only read but X knows it will eventually want to write and does not want to be troubled with possible SQLITE_BUSY_SNAPSHOT errors that arise because another connection jumped ahead of it in line, then X can issue BEGIN IMMEDIATE to start its transaction instead of just an ordinary BEGIN. For complex transactions that needs multiples writes (and reads) we create separate databases objects to ensure proper isolation Īccording to documentation it would be safe to start the transaction with 'begin immediate'.Simple update statements can also could be also achieved with a a shared database object as there is no risk of overlapping transactions (unless i miss something).a single database object can be shared between readers. ![]()
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