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> Aurora DSQL isolation level is equivalent to PostgreSQL Repeatable Read.

So it lacks Serializable isolation also, but I guess that's the secret to how it "offers the fastest distributed SQL reads and writes".

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DynamoDB with the limitations thereof but with a SQL like frontend so it works with slightly modified existing tooling isn't totally without value.

Agreed, but it seems likely that people will casually pick this up instead of actual Postgres without fully appreciating the potential for consistency issues. I'd feel happier if AWS marketing applied your description of the value proposition - 'DynamoSQL'.

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