Clean up AAsyncCallContext and SqlDataReader #925
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JRahnama
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Feb 22, 2021
src/Microsoft.Data.SqlClient/netcore/src/Microsoft/Data/SqlClient/SqlDataReader.cs
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DavoudEshtehari
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Jun 16, 2021
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The class definition is in contrast with document. According to the design, my guess is the document should update.
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About inheritance? Yes, it does seem to say that it can't be inherited. In this case since we don't intend to provide any kind of extensibility and users could serious screw up their data or programs by tinkering with things that they shouldn't I think sealing it might be a good idea. It is a breaking change though. |
johnnypham
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Jun 16, 2021
@DavoudEshtehari We can make a separate PR to address this. |
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Looking though #921 I realized that I hadn't got around to merging the SqlDataReader.AAsyncCallContext class with the top level one that I later derived from it. So I did that. I've cleaned up the inheritance and made the relationships between the classes and the functions that use them a little clearer with some comments so hopefully others will find it less confusing.
There's a small change in GetFieldValueAsync to use a static delegate that already existed rather than allocating a lambda. This will have a minor memory improvement.
I'm still looking for a good way of caching the async call context for GetFieldValueAsync but that will wait for a future PR.