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So, MDEV-16934 introduced eq_range_index_dives_limit into 10.2.8 and 10.3.0.
The default was set to 0 (which means no limit) in order to not introduce
optimizer behavior change into stable versions.
The question is: should 10.4 also have 0 by default or we can set it to some
finite limit? MySQL's default value is 10.
Sergei Petrunia, Software Developer
MariaDB Corporation | Skype: sergefp | Blog: http://s.petrunia.net/blog