/// <summary>
/// Append the data item to the end of the database.
/// </summary>
/// <param name="data">The data item to store in the database</param>
/// <param name="txn">
/// If the operation is part of an application-specified transaction,
/// <paramref name="txn"/> is a Transaction object returned from
/// <see cref="DatabaseEnvironment.BeginTransaction"/>; if
/// the operation is part of a Berkeley DB Concurrent Data Store group,
/// <paramref name="txn"/> is a handle returned from
/// <see cref="DatabaseEnvironment.BeginCDSGroup"/>; otherwise null.
/// </param>
/// <returns>The heap record id allocated to the record</returns>
public HeapRecordId Append(DatabaseEntry data, Transaction txn)
{
DatabaseEntry key = new DatabaseEntry();
Put(key, data, txn, DbConstants.DB_APPEND);
return(HeapRecordId.fromArray(key.Data));
}
public void PutRecordCase1(HeapDatabase db, Transaction txn)
{
byte[] bigArray = new byte[4000];
HeapRecordId rid = new HeapRecordId(2, 0);
for (int i = 1; i <= 100; i++) {
if (txn == null)
rid = db.Append(
new DatabaseEntry(BitConverter.GetBytes(i)));
else
rid = db.Append(
new DatabaseEntry(BitConverter.GetBytes(i)), txn);
}
DatabaseEntry key = new DatabaseEntry(rid.toArray());
for (int i = 100; i <= 500; i++) {
if (txn == null)
db.Put(key, new DatabaseEntry(bigArray));
else
db.Put(key, new DatabaseEntry(bigArray), txn);
}
}