eitsupi commented on code in PR #3197:
URL: https://github.com/apache/arrow-adbc/pull/3197#discussion_r2244215273


##########
rust/driver_manager/src/lib.rs:
##########
@@ -720,6 +712,7 @@ fn set_option_database(
             ERR_ONLY_STRING_OPT,
             Status::NotImplemented,
         ))?,
+        (_, _) => unreachable!(),

Review Comment:
   After some thought, what do you think about the following approach?
   
   1. Currently, the version of adbc_core is `0.y.z`, which is not a stable 
version, so I think breaking changes due to enum extensions are relatively 
tolerable.
     Therefore, remove the `non_exhaustive` attribute from all enums except for 
`AdbcVersion`.
   2. Leave the `non_exhaustive` attribute only on AdbcVersion, which will 
obviously be extended in the future.
   3. Since it is desirable for adbc_driver_manager to cover all versions, we 
use the nightly toolchain to have Clippy detect 
`non_exhaustive_omitted_patterns` to prevent forgetting to update match arms.



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