Kirill Sizov created IGNITE-20446:
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Summary: Perform read before executing the Upsert operation
Key: IGNITE-20446
URL: https://issues.apache.org/jira/browse/IGNITE-20446
Project: Ignite
Issue Type: Task
Reporter: Kirill Sizov
If a transaction was committed/aborted, but for any reason the cleanup
operation was not performed on a node, the write intent entries would still be
present in the storage.
When an RO transaction sees write intents, no matter on primary or on any other
node, it performs write intent resolution and returns the correct result.
When an RW transaction sees write intents (happens on primary only), it also
performs write intent resolution and cleanup (done in IGNITE-20395,
IGNITE-20445), so we are safe.
But it works only for those RW transactions that perform READ operation before
making any changes. This is not the case for Upsert. So we need to change it to
read data (hence write intent resolution and cleanup).
*Definition of Done*
Upsert operation execution should result in write intent resolution and cleanup
if the affected rows still contain write intents of a finished transaction.
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