chore!: remove the arrow-55 feature

README.md

@@ -85,7 +85,6 @@ arrow versions as we can.
 We allow selecting the version of arrow to use via feature flags. Currently we support the following
 flags:
 
-- `arrow-55`: Use arrow version 55
 - `arrow-56`: Use arrow version 56
 - `arrow-57`: Use arrow version 57
 - `arrow`: Use the latest arrow version. Note that this is an _unstable_ flag: we will bump this to
@@ -171,4 +170,4 @@ Some design principles which should be considered:
 [cargo-llvm-cov]: https://github.com/taiki-e/cargo-llvm-cov
 [FFI]: ffi/
 [Arrow]: https://arrow.apache.org/rust/arrow/index.html
-[Tokio]: https://tokio.rs/
+[Tokio]: https://tokio.rs/

kernel/Cargo.toml

@@ -115,7 +115,6 @@ integration-test = ["hdfs-native-object-store/integration-test"]
 arrow = ["arrow-57"] # latest arrow version
 need-arrow = [] # need-arrow is a marker that the feature needs arrow dep
 
-arrow-55 = ["dep:arrow_55", "dep:parquet_55", "object_store", "comfy-table"]
 arrow-56 = ["dep:arrow_56", "dep:parquet_56", "object_store", "comfy-table"]
 arrow-57 = ["dep:arrow_57", "dep:parquet_57", "object_store", "comfy-table"]
 arrow-conversion = ["need-arrow"]

kernel/src/arrow_compat.rs

@@ -6,35 +6,20 @@ mod arrow_compat_shims {
     pub use parquet_57 as parquet;
 }
 
-#[cfg(all(
-    feature = "arrow-56",
-    not(feature = "arrow-57"),
-    not(feature = "arrow-55")
-))]
+#[cfg(all(feature = "arrow-56", not(feature = "arrow-57"),))]
 mod arrow_compat_shims {
     pub use arrow_56 as arrow;
     pub use parquet_56 as parquet;
 }
 
-#[cfg(all(
-    feature = "arrow-55",
-    not(feature = "arrow-57"),
-    not(feature = "arrow-56")
-))]
-mod arrow_compat_shims {
-    pub use arrow_55 as arrow;
-    pub use parquet_55 as parquet;
-}
-
 // if nothing is enabled but we need arrow because of some other feature flag, throw compile-time
 // error
 #[cfg(all(
     feature = "need-arrow",
-    not(feature = "arrow-55"),
     not(feature = "arrow-56"),
     not(feature = "arrow-57")
 ))]
-compile_error!("Requested a feature that needs arrow without enabling arrow. Please enable the `arrow-55`, `arrow-56`, or `arrow-57` feature");
+compile_error!("Requested a feature that needs arrow without enabling arrow. Please enable the `arrow-56`, or `arrow-57` feature");
 
-#[cfg(any(feature = "arrow-55", feature = "arrow-56", feature = "arrow-57"))]
+#[cfg(any(feature = "arrow-56", feature = "arrow-57"))]
 pub use arrow_compat_shims::*;

kernel/src/lib.rs

@@ -108,7 +108,7 @@ pub use log_path::LogPath;
 mod row_tracking;
 
 mod arrow_compat;
-#[cfg(any(feature = "arrow-55", feature = "arrow-56", feature = "arrow-57"))]
+#[cfg(any(feature = "arrow-56", feature = "arrow-57"))]
 pub use arrow_compat::*;
 
 pub mod kernel_predicates;