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SQL Anywhere 10.0.1 » SQL Anywhere Server - Programming » SQL Anywhere OLE DB and ADO APIs » ADO programming with SQL Anywhere

Updating data through a cursor Next Page

Using transactions

By default, any change you make to the database using ADO is committed as soon as it is executed. This includes explicit updates, as well as the UpdateBatch method on a Recordset. However, the previous section illustrated that you can use the BeginTrans and RollbackTrans or CommitTrans methods on the Connection object to use transactions.

The transaction isolation level is set as a property of the Connection object. The IsolationLevel property can take on one of the following values:

ADO isolation level Constant SQL Anywhere level
Unspecified adXactUnspecified Not applicable. Set to 0
Chaos adXactChaos Unsupported. Set to 0
Browse adXactBrowse 0
Read uncommitted adXactReadUncommitted 0
Cursor stability adXactCursorStability 1
Read committed adXactReadCommitted 1
Repeatable read adXactRepeatableRead 2
Isolated adXactIsolated 3
Serializable adXactSerializable 3
Snapshot 20971524
Statement snapshot41943045
Readonly statement snapshot83886086

For more information on isolation levels, see Isolation levels and consistency.