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There is still a unique constraint on run_id.  Currently it is generated deterministically from logical date plus run type.  What should we do for runs with no logical date?  How can we support the use case with many runs triggered in close succession such that perhaps even utcnow()  would collide.  What shall we do?

Question 7: How do we deal with APIs that select a logical date range?

For example, xcom_pull has include_prior_dates. Taskinstance.clear allows clearing all tis in a date range. Those use logical dates. What do runs with null logical date fit into these?

Resolution of questions

Here will be where I work out the consensus view based on feedback.  This will be amended as we go.

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