[jira] [Created] (FLINK-22141) Manually test exactly-once JDBC sink

[Shang Yuanchun (Jira)]

Roman Khachatryan created FLINK-22141:
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             Summary: Manually test exactly-once JDBC sink
                 Key: FLINK-22141
                 URL: https://issues.apache.org/jira/browse/FLINK-22141
             Project: Flink
          Issue Type: Test
          Components: Connectors / JDBC
            Reporter: Roman Khachatryan
             Fix For: 1.13.0


In FLINK-15578, an API and its implementation were added to JDBC connector to support exactly-once semantics for sinks. The implementation uses JDBC XA transactions.

The scope of this task is to make sure:
 # The feature is well-documented
 # The API is reasonably easy to use
 # The implementation works as expected
 ## normal case: database is updated on checkpointing
 ## failure and recovery case: no duplicates inserted, no records skipped
 ## several DBs: postgressql, mssql, oracle (mysql has a known issue: FLINK-21743)
 ## concurrent checkpoints > 1, DoP > 1
 # Logging is meaningful



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