"PGresult objects are read-only after creation, and so can be passed around freely between threads." From http://www.postgresql.org/docs/9.1/static/libpq-threading.html But what about things like PQsetvalue? Is that a documentation bug? Should result objects be protected by synchronization as well as connection objects?
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Соглашаюсь с условиями обработки персональных данных