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Transaction savepoints (JDBC 3.0)

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by , 11-28-2011 at 06:32 PM (3181 Views)
JDBC 2 provides complete transaction rollback control over transaction. But if you want to rollback to a point, you cannot do so. JDBC 3.0 introduces savepoints which makes this possible.

JDBC 3.0 provides more control over transactions using savepoints. The Savepoint interface allows us to partition a transaction into logical breakpoints. This in turn provides control over how much of the transaction we wish to rolled back.

Lets see how to do this. Review the following example:

Java Code:
// Set a conservative transaction isolation level.
Statement stmt = conn.createStatement();
int rows = stmt.executeUpdate(    "INSERT INTO authors " +
                "(first_name, last_name) VALUES " +
                "('Lewis', 'Carroll')");
// Set a named savepoint.
Savepoint svpt = conn.setSavepoint("NewAuthor");
// ...

rows = stmt.executeUpdate(    "UPDATE authors set type = 'fiction' " +
                "WHERE last_name = 'Carroll'");

// ...
// ...
// The author has been added, but not updated.
Its really an interesting feature. Try it out.

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Tags: jdbc 2, savepoint Add / Edit Tags