godfreyhe commented on issue #9203: [FLINK-13375][table-api] Improve config names in ExecutionConfigOptions and OptimizerConfigOptions URL: https://github.com/apache/flink/pull/9203#issuecomment-514521764 I think readability and extendibility of a config name is more important than strict level. From this point of view, I also tend to align by functionality instead of operator. e.g. `lookup` has `async` and `sync` mode, I think `table.exec.async-lookup.XXX` and `table.exec.sync-lookup.XXX` is more clear than `table.exec.lookup.async-XXX` and `table.exec.lookup.sync-XXX`. about `enabled`, I think the readability is almost the same about `table.exec.sort.async-merge.enabled` and `table.exec.sort.async-merge-enabled`, however the extendibility of the first one is better than second one.
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