Determines how the shard iterator is used to start reading data records from the shard. The following are the valid shard iterator types:
- AT_SEQUENCE_NUMBER - Start reading exactly from the position denoted by a specific sequence number.
- AFTER_SEQUENCE_NUMBER - Start reading right after the position denoted by a specific sequence number.
- TRIM_HORIZON - Start reading at the last untrimmed record in the shard in the system, which is the oldest data record in the shard.
- LATEST - Start reading just after the most recent record in the shard, so that you always read the most recent data in the shard.
Constraints:

C# |
public string ShardIteratorType { get; set; }