Commits on Feb 20, 2021

1. kv: add TestStoreRangeSplitAndMergeWithGlobalReads …

   Made possible by cockroachdb#60567.
   
   This commit adds a new test called TestStoreRangeSplitAndMergeWithGlobalReads
   that tests that a range configured to serve global reads can be split and
   merged. In essence, this tests whether the split and merge transactions can
   handle having their timestamp bumped by the closed timestamp on the ranges
   they're operating on.
   
   The test revealed that range merges did have issues in these cases, because
   SubsumeRequests assumed that the intent on the RHS's local descriptor was below
   the node's HLC clock. This is no longer always true, so we now perform the
   inconsistent scan at hlc.MaxTimestamp, just like QueryIntent requests do.

   

   nvanbenschoten committed Feb 20, 2021
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