refactor(rust)!: not to mark some enums as non_exhaustive

.github/workflows/rust.yml

@@ -160,10 +160,16 @@ jobs:
       - name: Set search dir for Snowflake Go lib
         run: echo "ADBC_SNOWFLAKE_GO_LIB_DIR=${{ github.workspace }}/local/lib" >> "$GITHUB_ENV"
       - name: Clippy
-        if: ${{ ! matrix.minimal-versions }}
+        if: runner.os != 'Linux' && ! matrix.minimal-versions
         working-directory: rust
         run: |
           cargo clippy --workspace --all-targets --all-features --locked -- -Dwarnings
+      - name: Clippy (nightly)
+        if: runner.os == 'Linux' && ! matrix.minimal-versions
+        working-directory: rust
+        run: |
+          rustup toolchain install nightly --component clippy
+          cargo +nightly clippy --workspace --all-targets --all-features --locked -- -Dwarnings -Zcrate-attr='feature(non_exhaustive_omitted_patterns_lint)'
       - name: Test
         working-directory: rust
         # TODO: enable snowflake tests on windows

rust/core/src/error.rs

@@ -24,7 +24,6 @@ use arrow_schema::ArrowError;
 
 /// Status of an operation.
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
-#[non_exhaustive]
 pub enum Status {
     /// No error.
     Ok,

rust/core/src/options.rs

@@ -232,7 +232,6 @@ impl TryFrom<u32> for InfoCode {
 
 /// Depth parameter for [get_objects][crate::Connection::get_objects] method.
 #[derive(Debug)]
-#[non_exhaustive]
 pub enum ObjectDepth {
     /// Catalogs, schemas, tables, and columns.
     All,
@@ -462,7 +461,6 @@ impl From<&str> for OptionStatement {
 
 /// Isolation level value for key [OptionConnection::IsolationLevel].
 #[derive(Debug)]
-#[non_exhaustive]
 pub enum IsolationLevel {
     /// Use database or driver default isolation level.
     Default,
@@ -538,7 +536,6 @@ impl From<IsolationLevel> for OptionValue {
 
 /// Ingestion mode value for key [OptionStatement::IngestMode].
 #[derive(Debug)]
-#[non_exhaustive]
 pub enum IngestMode {
     /// Create the table and insert data; error if the table exists.
     Create,
@@ -581,7 +578,6 @@ impl From<IngestMode> for OptionValue {
 
 /// Statistics about the data distribution.
 #[derive(Debug, Clone)]
-#[non_exhaustive]
 pub enum Statistics {
     /// The average byte width statistic. The average size in bytes of a row in
     /// the column. Value type is `float64`. For example, this is roughly the