[jira] [Created] (CAMEL-13951) JdbcAggregationRepository doesn't work with PostgreSQL

["Grzegorz Grzybek (Jira)" <ji...@apache.org>]

Grzegorz Grzybek created CAMEL-13951:
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             Summary: JdbcAggregationRepository doesn't work with PostgreSQL
                 Key: CAMEL-13951
                 URL: https://issues.apache.org/jira/browse/CAMEL-13951
             Project: Camel
          Issue Type: Bug
          Components: camel-sql
    Affects Versions: 3.0.0.RC1, 2.24.1
            Reporter: Grzegorz Grzybek
            Assignee: Grzegorz Grzybek


See:
* https://www.postgresql.org/message-id/200609241203.59292.ralf.wiebicke%40exedio.com
* https://groups.google.com/forum/#!msg/comp.databases.postgresql/NuXGXdFbA4g/LQ97ahowmxkJ
* https://www.progress.com/blogs/solution-to-current-transaction-is-aborted-error-for-postgresql-compatibility-with-odbc-jdbc

The problem is that JdbcAggregationRepository relies heavily on spring-jdbc's throwing org.springframework.dao.DataIntegrityViolationException according to its sql exception mapping.

By default, DataIntegrityViolationException is thrown if SQLState starts with {{23}}. Check https://www.postgresql.org/docs/10/errcodes-appendix.html and see that:
bq. 23505: unique_violation

The _problem_ specific to PostgreSQL is that hitting such exception makes the connection (and surrounding Spring transaction) unusable. There's no way to _repeat_ an attempt to insert (or even check current) state of aggregation, because PostgreSQL will immediately throw:
{noformat}
Caused by: org.postgresql.util.PSQLException: ERROR: current transaction is aborted, commands ignored until end of transaction block
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2468)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2211)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:309)
	at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:446)
...
{noformat}

With SQLState - {{25P02}} == "in_failed_sql_transaction".

The expected (by PostgreSQL) behavior is to rollback current transaction and start over.

We're however in (potentially nested) TransactionTemplate and _rollback only_ status is beyond (easy) control.



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