Merge MySQL 8.0.18.
https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-18.html
Verify upstream fixes and revert ours, keeping the testcases if applicable:
PS-4546/ https://bugs.mysql.com/bug.php?id=91423PS-2455/ https://bugs.mysql.com/bug.php?id=76020PS-5828/ https://bugs.mysql.com/bug.php?id=96433PS-5836/ https://bugs.mysql.com/bug.php?id=96449PS-3410/ https://bugs.mysql.com/bug.php?id=82940
Check if testcases are present, if not, add for:
- has to be done before
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PS-5938 Merge MySQL 8.0.19
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- Done
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- relates to
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PS-5590 Upstream:95183:redo logs may silently be ignored when encrypted table cannot be decrypted.
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- Done
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PS-3479 5.7 - LP #1598822: Deadlock with 3 concurrent DELETEs by unique key and triggers reading the same row
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- On Hold
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PS-5854 Assertion "mtr0mtr.h.219.m_impl.m_memo.size.." with temp tables and big_tables
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- Done
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PS-6826 8.0 - LP #1598822: Deadlock with 3 concurrent DELETEs by unique key and triggers reading the same row
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- Done
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