Issue/247 duplicate resources #250
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check needed to avoid NPE in HAPI code
* Unique constraints implemented as constraint trigger run after insert * Constraint trigger functions use postgres advisory transaction locks to ensure uniqueness checks are not executed in parallel * Transaction isolation level of insert/update operations changed from repeatable read to read committed, enabling dirty reads needed to allow constraint triggers to see inserts/updates executed by parallel running transactions * New integration test to validate parallel create operations via transaction and batch bundles as well as direct POSTs
This does not change any behavior as currently no delete authorization rule is dependent on the DB state.
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Adds check to make sure StructureDefinitions define a base definition
Fixes transaction bundle error message
Code cleanup
Unique constraints implemented as constraint trigger run after insert
Constraint trigger functions use postgres advisory transaction locks to ensure uniqueness checks are not executed in parallel
Transaction isolation level of insert/update operations changed from repeatable read to read committed, enabling dirty reads needed to allow constraint triggers to see inserts/updates executed by parallel running transactions
New integration test to validate parallel create operations via transaction and batch bundles as well as direct POSTs
TODO: Delete queries to cleanup duplicate resources from production DBs
closes #247