Bulk Update Locks: Used when bulk-copying data into a table and the TABLOCK hint is specified.

大容量更新锁：在向表进行大容量数据复制且指定了TABLOCK提示时使用。

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UpdateError is thrown by the bulk update methods if one or more of the documents are not updated successfully.

UpdateError在未成功更新一个或多个文档时由bulk更新方法抛出。

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If updates to the coordinate columns are possible, you may still be able to avoid bulk copies if the source table contains a time stamp column that records the time of last update for each row.

如果可能更新坐标列，但是源表包含一个时间戳列，其中记录了每行最后一次更新的时间，那么仍然可以避免批量复制。

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