[英]Using savepoints with the JDBC-ODBC Bridge: UnsupportedOperationException
我已將NetBeans IDE與MS Access連接在一起,並且在進行事務處理時遇到此錯誤。 似乎不支持保存點...請指導我。
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DriverManager.getConnection("jdbc:odbc:cse");
Statement stmt1, stmt2, stmt3;
System.out.println("Statements created");
conn.setAutoCommit(false);
String query1 = " update registration set id='105' " +
"where first = 'Sumit' ";
String query2 = " update registration set id='106' " +
"where first = 'Zayed' ";
System.out.println(" Queries created");
stmt1 = conn.createStatement();
System.out.println(" Connection created");
Savepoint s1 = conn.setSavepoint("sp1");
System.out.println(" Savept created");
stmt2 = conn.createStatement();
stmt1.executeUpdate(query1);
stmt2.executeUpdate(query2);
conn.commit();
stmt3 = conn.createStatement();
stmt1.close();
stmt2.close();
conn.releaseSavepoint(s1);
conn.close();
錯誤是創建語句創建的查詢創建連接創建的錯誤:java.lang.UnsupportedOperationException
JDBC-ODBC Bridge顯然根本不支持保存點。 但是, UCanAccess JDBC驅動程序確實支持未命名的保存點:
String connStr = "jdbc:ucanaccess://C:/__tmp/test.mdb";
try (Connection conn = DriverManager.getConnection(connStr)) {
conn.setAutoCommit(false);
try (Statement s = conn.createStatement()) {
s.executeUpdate("UPDATE ucaTest SET Field2='NEWVALUE1' WHERE ID=1");
}
java.sql.Savepoint sp1 = conn.setSavepoint();
try (Statement s = conn.createStatement()) {
s.executeUpdate("UPDATE ucaTest SET Field2='NEWVALUE2' WHERE ID=2");
}
conn.rollback(sp1);
conn.commit();
} catch (Exception e) {
e.printStackTrace(System.out);
}
有關使用UCanAccess的更多信息,請參見
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