[teiid-issues] [JBoss JIRA] (TEIID-5498) Allow the pg layer to work for simple selects with the postgres_fdw

[Steven Hawkins (Jira)]

Steven Hawkins created TEIID-5498:
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             Summary: Allow the pg layer to work for simple selects with the postgres_fdw
                 Key: TEIID-5498
                 URL: https://issues.jboss.org/browse/TEIID-5498
             Project: Teiid
          Issue Type: Sub-task
          Components: ODBC
            Reporter: Steven Hawkins
            Assignee: Steven Hawkins
             Fix For: 11.2


Another avenue for materialization support outlined in TEIID-4251 is to rely upon pg materialization, which would be easiest to setup through their foreign data wrapper.  However it expects some additional support for:

start transaction syntax
abort transaction
automatic cleanup of portals/cursors at the end of a transaction
prepared cursors

Additionally this will have the same performance issue that we have with declare/fetch initially - that is a cursor requires a transaction, and our current strategy requires pre-buffering the results under a transaction.  However since this would only be used for load/refresh that performance hit may be negligible - if now we'd need similar logic to effectively ignore the transaction wrapping.



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