Update minimum rust version to 1.72

.github/workflows/rust.yml

@@ -492,7 +492,11 @@ jobs:
           ./dev/update_config_docs.sh
           git diff --exit-code
 
-  # Verify MSRV for the crates which are directly used by other projects.
+  # Verify MSRV for the crates which are directly used by other projects:
+  # - datafusion
+  # - datafusion-substrait
+  # - datafusion-proto
+  # - datafusion-cli
   msrv:
     name: Verify MSRV (Min Supported Rust Version)
     runs-on: ubuntu-latest

Cargo.toml

@@ -28,7 +28,7 @@ homepage = "https://github.com/apache/arrow-datafusion"
 license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/apache/arrow-datafusion"
-rust-version = "1.70"
+rust-version = "1.72"
 version = "35.0.0"
 
 [workspace.dependencies]

benchmarks/Cargo.toml

@@ -24,7 +24,7 @@ authors = ["Apache Arrow <dev@arrow.apache.org>"]
 homepage = "https://github.com/apache/arrow-datafusion"
 repository = "https://github.com/apache/arrow-datafusion"
 license = "Apache-2.0"
-rust-version = "1.70"
+rust-version = { workspace = true }
 
 [features]
 ci = []

datafusion-cli/Cargo.toml

@@ -25,7 +25,8 @@ keywords = ["arrow", "datafusion", "query", "sql"]
 license = "Apache-2.0"
 homepage = "https://github.com/apache/arrow-datafusion"
 repository = "https://github.com/apache/arrow-datafusion"
-rust-version = "1.70"
+# Specify MSRV here as `cargo msrv` doesn't support workspace version
+rust-version = "1.72"
 readme = "README.md"
 
 [dependencies]

datafusion/core/Cargo.toml

@@ -27,7 +27,10 @@ homepage = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
-rust-version = "1.70"
+# Specify MSRV here as `cargo msrv` doesn't support workspace version and fails with
+# "Unable to find key 'package.rust-version' (or 'package.metadata.msrv') in 'arrow-datafusion/Cargo.toml'"
+# https://github.com/foresterre/cargo-msrv/issues/590
+rust-version = "1.72"
 
 [lib]
 name = "datafusion"

datafusion/expr/src/expr.rs

@@ -33,7 +33,7 @@ use datafusion_common::{plan_err, Column, DataFusionError, Result, ScalarValue};
 use std::collections::HashSet;
 use std::fmt;
 use std::fmt::{Display, Formatter, Write};
-use std::hash::{BuildHasher, Hash, Hasher};
+use std::hash::Hash;
 use std::str::FromStr;
 use std::sync::Arc;
 
@@ -853,13 +853,8 @@ const SEED: ahash::RandomState = ahash::RandomState::with_seeds(0, 0, 0, 0);
 
 impl PartialOrd for Expr {
     fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
-        let mut hasher = SEED.build_hasher();
-        self.hash(&mut hasher);
-        let s = hasher.finish();
-
-        let mut hasher = SEED.build_hasher();
-        other.hash(&mut hasher);
-        let o = hasher.finish();
+        let s = SEED.hash_one(self);
+        let o = SEED.hash_one(other);
 
         Some(s.cmp(&o))
     }

datafusion/physical-expr/src/aggregate/hyperloglog.rs

@@ -34,8 +34,8 @@
 //!
 //! This module also borrows some code structure from [pdatastructs.rs](https://github.com/crepererum/pdatastructs.rs/blob/3997ed50f6b6871c9e53c4c5e0f48f431405fc63/src/hyperloglog.rs).
 
-use ahash::{AHasher, RandomState};
-use std::hash::{BuildHasher, Hash, Hasher};
+use ahash::RandomState;
+use std::hash::Hash;
 use std::marker::PhantomData;
 
 /// The greater is P, the smaller the error.
@@ -102,9 +102,7 @@ where
     /// reasonable performance.
     #[inline]
     fn hash_value(&self, obj: &T) -> u64 {
-        let mut hasher: AHasher = SEED.build_hasher();
-        obj.hash(&mut hasher);
-        hasher.finish()
+        SEED.hash_one(obj)
     }
 
     /// Adds an element to the HyperLogLog.

datafusion/proto/Cargo.toml

@@ -26,7 +26,8 @@ homepage = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
-rust-version = "1.70"
+# Specify MSRV here as `cargo msrv` doesn't support workspace version
+rust-version = "1.72"
 
 # Exclude proto files so crates.io consumers don't need protoc
 exclude = ["*.proto"]

datafusion/proto/gen/Cargo.toml

@@ -20,7 +20,7 @@ name = "gen"
 description = "Code generation for proto"
 version = "0.1.0"
 edition = { workspace = true }
-rust-version = "1.64"
+rust-version = "1.72"
 authors = ["Apache Arrow <dev@arrow.apache.org>"]
 homepage = "https://github.com/apache/arrow-datafusion"
 repository = "https://github.com/apache/arrow-datafusion"

datafusion/substrait/Cargo.toml

@@ -25,7 +25,8 @@ homepage = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
-rust-version = "1.70"
+# Specify MSRV here as `cargo msrv` doesn't support workspace version
+rust-version = "1.72"
 
 [dependencies]
 async-recursion = "1.0"

datafusion/wasmtest/Cargo.toml

@@ -25,7 +25,7 @@ homepage = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
-rust-version = "1.70"
+rust-version = { workspace = true }
 
 [lib]
 crate-type = ["cdylib", "rlib"]

docs/Cargo.toml

@@ -26,7 +26,7 @@ homepage = { workspace = true }
 repository = { workspace = true }
 license = { workspace = true }
 authors = { workspace = true }
-rust-version = "1.70"
+rust-version = { workspace = true }
 
 [dependencies]
 datafusion = { path = "../datafusion/core", version = "35.0.0", default-features = false }