| C | ↗ | B | Connection improved |
| A | ↛ | NullEventLogger removed | |
| A | ↛ | NullQueryLogger removed |
| ⇢ | A | EventLogger::activate() added | |
| ⇢ | A | QueryLogger::activate() added | |
| B | ↗ | A | OC_DB_StatementWrapper::execute() improved |
| A | ↛ | NullEventLogger::start() removed | |
| A | ↛ | NullEventLogger::end() removed | |
| A | ↛ | NullEventLogger::log() removed | |
| A | ↛ | NullEventLogger::getEvents() removed | |
| A | ↛ | NullQueryLogger::startQuery() removed | |
| A | ↛ | NullQueryLogger::stopQuery() removed | |
| A | ↛ | NullQueryLogger::getQueries() removed |