Applies To
OraDynaset
Description
Returns the SnapshotID. Read and write at runtime.
Usage
SnapshotID = OraDynaset.Snapshot
Remarks
The SnapshotID represents the snapshot from which this dynaset was created. It
can be thought of as a timestamp. It can be passed into other CreateDynaset method calls to cause them to be created using data from the same point in
time as the original dynaset.
The SnapshotID property may be set with the value of another SnapshotID. That
new snapshot will be used during the next Refresh when the query is
re-executed. The Snapshot property always returns the SnapshotID on which this OraDynaset Object was based, not any other SnapshotID set via the snapshot property.
The SnapshotID will become invalid after a certain amount of time that is
dependent on the amount of activity and the configuration of the database. When
this happens you will get a "Snapshot too old" error message. For more information
on snapshots, see the Oracle8i Concepts manual.
This SnapshotID represents the point in time when this dynaset was created.
Changes to this dynaset (Edit, Delete, and AddNew operations) will not be
reflected in additional dynasets created using this SnapshotID because they occurred
after that point in time.
SnapshotID's are only meaningful for SELECT statements where the tables
referenced are real database tables, as opposed to pseudo tables like DUAL.
One valuable use of SnapshotID is to calculate the number of rows in a table
without using the RecordCount property which causes every row to be fetched. See
Example 2 in the SnapShot Examples.
DataType
Object
