adding prototype #119

Job	Run time
Check cargo fmt	45s
cargo check	10m 46s
build with wasm-pack	2m 41s
cargo test (macos)	31m 19s
cargo test (macos-aarch64)	8m 0s
Verify Vendored Code	53s
cargo test (win64)	36m 32s
Verify MSRV (Min Supported Rust Version)	7m 11s
clippy	2m 17s
check Cargo.toml formatting	2m 57s
cargo test hash collisions (amd64)	10m 20s
check configs.md is up-to-date	2m 21s
cargo doc	3m 38s
cargo test (amd64)	10m 42s
cargo test datafusion-cli (amd64)	3m 23s
cargo test doc (amd64)	13m 18s
cargo examples (amd64)	10m 29s
Run sqllogictest with Postgres runner	3m 2s
cargo test pyarrow (amd64)	2m 44s
verify benchmark results (amd64)	10m 21s
	2h 53m 39s

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