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A comment on Pitfalls of Isolation Levels in Distributed Databases.
https://www.postgresql.org/docs/9.5/transaction-iso.html
and can be done w/o any locking or waiting -- you can keep track of which data transaction A has accessed and if transaction B commits that changes something A depends on you abort transaction A and the application can try it over.
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https://www.postgresql.org/docs/9.5/transaction-iso.html
and can be done w/o any locking or waiting -- you can keep track of which data transaction A has accessed and if transaction B commits that changes something A depends on you abort transaction A and the application can try it over.