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Specifies SQL Anywhere isolation levels. This class augments the ![[external link]](gif/external.gif)
IsolationLevel.
Visual Basic
Public Enum SAIsolationLevel
C#
public enum SAIsolationLevel
The SQL Anywhere .NET Data Provider supports all SQL Anywhere isolation levels, including the snapshot isolation levels. To use snapshot isolation, specify one of SAIsolationLevel.Snapshot, SAIsolationLevel.ReadOnlySnapshot, or SAIsolationLevel.StatementSnapshot as the parameter to BeginTransaction. BeginTransaction has been overloaded so it can take either an IsolationLevel or an SAIsolationLevel. The values in the two enumerations are the same, except for ReadOnlySnapshot and StatementSnapshot which exist only in SAIsolationLevel. There is a new property in SATransaction called SAIsolationLevel that gets the SAIsolationLevel.
For more information, see Snapshot isolation.
| Member name | Description | Value |
|---|---|---|
| Chaos | This isolation level is unsupported. | 16 |
| ReadCommitted | Sets the behavior to be equivalent to isolation level 1. | 4096 |
| ReadOnlySnapshot | For read-only statements, use a snapshot of committed data from the time when the first row is read from the database. | 16777217 |
| ReadUncommitted | Sets the behavior to be equivalent to isolation level 0. | 256 |
| RepeatableRead | Sets the behavior to be equivalent to isolation level 2. | 65536 |
| Serializable | Sets the behavior to be equivalent to isolation level 3. | 1048576 |
| Snapshot | Uses a snapshot of committed data from the time when the first row is read, inserted, updated, or deleted by the transaction. | 16777216 |
| StatementSnapshot | Use a snapshot of committed data from the time when the first row is read by the statement. Each statement within the transaction sees a snapshot of data from a different time. | 16777218 |
| Unspecified | This isolation level is unsupported. | -1 |