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In This Case It Does Work.

One plausible scenario is existence of another future grants that are assigned on schema level to different role. If the future is the result of a call to std::async that used lazy evaluation, this function returns immediately without waiting. This function may block for longer than timeout_duration due to.

In General, It Probably Doesn't.

I'm wondering how this break in backwards compatibility should in general be navigated. Most likely, as you aren't doing this just for fun, you actually need the. The behavior is undefined if valid() == false before the call to this function.

An Asynchronous Operation (Created Via Std::async, Std::packaged_Task,.

Std::future is an object used in multithreaded programming to receive data or an exception from a different thread; Perhaps installing a previous version of. The behavior is undefined if valid () is false before the call to this.

In Such Situation Future Grants Assigned On The Database Level Are Ignored.

Blocks until the result becomes available. The get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared state (if any). Right after calling this function, valid () is false.

The Class Template Std::future Provides A Mechanism To Access The Result Of Asynchronous Operations:

A future represents the result of an asynchronous operation, and can have two states: Valid() == true after the call. If the future is the result of a call to async that used lazy evaluation, this function returns immediately without waiting.