@Override
  public String toString() {
    return "SnapshotContext{" +
        "snapshotId=" + snapshotId +
        ", operation=" + operation +
        ", addedRowCount=" + addedRowCount +
        ", deletedRowCount=" + deletedRowCount +
        '}';
  }
Unique identifier of this snapshot context and the underlying snapshot.
@return long snapshotId.
storage-api/src/java/org/apache/hadoop/hive/common/type/SnapshotContext.java