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Note 1 uncommitted transactions - PowerPoint PPT Presentation

Recovery from Crashes

Recovery from Crashes. ACID. A transaction is atomic -- all or none property. If it executes partly, an invalid state is likely to result. A transaction, may change the DB from a consistent state to another consistent state. Otherwise it is rejected (aborted).

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Transactions

Transactions. A process that reads or modifies the DB is called a transaction . It is a unit of execution of database operations. Basic JDBC transaction pattern Connection conn = ...; conn.setAutoCommit(false); try { ... //JDBC statements } finally { conn.commit(); }.

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Transactions

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258 views • 25 slides

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Note 1 uncommitted transactions - PowerPoint PPT Presentation

Recovery from Crashes

Transactions

Transactions