Rust

refactor: use proper error methods #67

Job	Run time
Check cargo fmt	40s
Check License Header	2m 11s
cargo check	13m 55s
build with wasm-pack	3m 20s
cargo test (macos)	7m 28s
cargo test (macos-aarch64)	7m 40s
Verify MSRV (Min Supported Rust Version)	9m 28s
Verify Vendored Code	48s
cargo examples (amd64)	14m 38s
clippy	7m 15s
check configs.md and ***_functions.md is up-to-date	3m 47s
check Cargo.toml formatting	2m 54s
cargo test hash collisions (amd64)	29m 10s
cargo doc	4m 27s
cargo test (amd64)	13m 47s
cargo test datafusion-cli (amd64)	4m 40s
cargo test doc (amd64)	17m 57s
Run sqllogictest with Postgres runner	4m 11s
cargo test pyarrow (amd64)	3m 15s
verify benchmark results (amd64)	15m 23s
	2h 46m 54s

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