Make code more concise #687

Job	Run time
linux build test	5m 11s
Check License Header	2m 20s
Check cargo fmt	42s
build with wasm-pack	3m 25s
cargo test (macos-aarch64)	9m 5s
Verify Vendored Code	56s
Verify MSRV (Min Supported Rust Version)	8m 3s
cargo test (amd64)	15m 58s
cargo check no default features	8m 26s
cargo check datafusion	5m 13s
cargo check functions	2m 17s
cargo examples (amd64)	15m 43s
cargo doc	4m 3s
cargo test doc (amd64)	17m 37s
Run sqllogictest with Postgres runner	5m 16s
cargo test pyarrow (amd64)	3m 26s
verify benchmark results (amd64)	9m 23s
check Cargo.toml formatting	2m 50s
clippy	6m 11s
check configs.md and ***_functions.md is up-to-date	4m 11s
	2h 10m 16s

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