Dmitry Lenev

https://perconadev.atlassian.net/browse/PS-9092 Problem: Query over InnoDB table that uses backward scan over the index occasionally might return incorrect/incomplete results when changes to table (for example, DELETEs in other or even the...

This patch introduces new global dynamic EXPLAIN_OBSERVER privilege which allows users which have it to run EXPLAIN statement for any DML. For users which don't have this privilege EXPLAIN for...

Merge fixes for PS-9144 and PS-9214 into 8.0 release tree.

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See individual commits for proper change descriptions.

Ps 8.0 9214

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PS-9214 : Alter table online results in "duplicate key" error on the primary key (only index). https://perconadev.atlassian.net/browse/PS-9214 Problem: -------- ALTER TABLE with rebuilds InnoDB table using INPLACE algorithm occasionally might...

…oad as PS-9092 https://perconadev.atlassian.net/browse/PS-9144 Problem: -------- ALTER TABLE which rebuilds InnoDB table using INPLACE algorithm might sometimes lead to row loss if concurrent purge happens on the table being ALTERed....

See individual commits for detailed commit descriptions.