Fix isolation level in AWS Aurora #3976
Merged
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If aurora_read_replica_read_committed is set, isolation level is internally reset so that it will be set again.
This solves the weird behavior in AWS Aurora related to isolation level as described in
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/AuroraMySQL.Reference.html#AuroraMySQL.Reference.IsolationLevels
Basically, to change isolation level you must first set aurora_read_replica_read_committed , and then isolation level