The Extensible Storage Engine (ESE) is one of those rare codebases having proven to have a more than 25 year serviceable lifetime. First shipping in Windows NT 3.51 and shortly thereafter in Exchange 4.0, and rewritten twice in the 90s, and heavily updated over the subsequent two decades after that, it remains a core Microsoft asset to this day.
ESE enables applications to store data to, and retrieve data from tables using indexed or sequential cursor navigation. It supports denormalized schemas including wide tables with numerous sparse columns, multi-valued columns, and sparse and rich indexes. ESE enables applications to enjoy a consistent data state using transacted data update and retrieval. A crash recovery mechanism is provided so that data consistency is maintained even in the event of a system crash. ESE provides ACID (Atomic Consistent Isolated Durable) transactions over data and schema by way of a write-ahead log and a snapshot isolation model.
The library provides many other strongly layered and, thus, reusable sub-facilities as well:
All this is in addition to the full-blown database engine itself.
The version of source we post here will likely be a bit in advance of the version compiled into the latest Windows update. Therefore, the JET API documentation may be out of date with it.
No. Well ... it depends ... the question is not quite correct. Most people do not know that JET was an acronym for an API set, not a specific database format or engine. Just as there is no such thing as "the SQL engine", as there are many implementations of the protocol, there is no "JET engine" or "JET database". It is in the acronym, "Joint Engine Technology". And as such, there are two separate implementations of the JET API. This is the JET Blue engine implementation, see Notes in here. The origin of the colors have an an amusing source by the way. Most people think of the "JET engine" as JET Red, that shipped under Microsoft Access. This is not that "JET engine". We renamed to ESE to try to avoid this confusion, but it seems that the confusion continues to this day.
The code as of June 2021 is a single snapshot of the source code. We will be pushing commits from our internal repo as they are made individually, instead of as a periodic monolithic drop.
We released the unit tests, but we may in the future release more of the test code.
We will also be adding Azure pipelines to run the tests that are already present in this repo.
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。