Rust

Fix ut #49

Job	Run time
Check cargo fmt	35s
cargo test (macos)	10m 30s
build with wasm-pack	2m 12s
cargo check	3m 30s
cargo test (macos-aarch64)	9m 52s
Verify MSRV (Min Supported Rust Version)	6m 20s
cargo test (win64)	42m 33s
Verify Vendored Code	49s
cargo test datafusion-cli (amd64)	3m 35s
cargo test (amd64)	9m 39s
cargo doc	3m 37s
cargo test doc (amd64)	14m 1s
cargo examples (amd64)	12m 19s
check Cargo.toml formatting	2m 54s
clippy	5m 26s
check configs.md is up-to-date	2m 36s
cargo test hash collisions (amd64)	8m 51s
Run sqllogictest with Postgres runner	3m 20s
cargo test pyarrow (amd64)	2m 59s
verify benchmark results (amd64)	10m 30s
	2h 36m 8s

Provide feedback