adding cast UTF8 type and diable scalarfunction situation #35

Job	Run time
cargo check	7m 51s
Check cargo fmt	46s
build with wasm-pack	2m 25s
cargo test (macos)	19m 52s
cargo test (macos-aarch64)	9m 13s
Verify MSRV (Min Supported Rust Version)	6m 56s
Verify Vendored Code	49s
cargo test (win64)	43m 36s
cargo examples (amd64)	8m 42s
cargo test datafusion-cli (amd64)	3m 34s
clippy	2m 53s
cargo test hash collisions (amd64)	9m 24s
cargo doc	3m 51s
cargo test (amd64)	9m 32s
cargo test doc (amd64)	11m 26s
Run sqllogictest with Postgres runner	3m 4s
cargo test pyarrow (amd64)	2m 34s
verify benchmark results (amd64)	10m 22s
check Cargo.toml formatting	1m 24s
check configs.md is up-to-date	2m 36s
	2h 40m 50s

Provide feedback