add ut #19

Job	Run time
Check cargo fmt	39s
cargo check	2m 17s
cargo test (mac)	10m 3s
build with wasm-pack	1m 54s
Verify MSRV	6m 19s
Verify Vendored Code	48s
cargo test (win64)	24m 12s
cargo test doc (amd64)	9m 25s
cargo examples (amd64)	6m 15s
cargo test (amd64)	8m 18s
Run sqllogictest with Postgres runner	3m 7s
cargo doc	3m 9s
cargo test datafusion-cli (amd64)	2m 47s
cargo test pyarrow (amd64)	2m 19s
verify benchmark results (amd64)	9m 23s
check configs.md is up-to-date	2m 8s
clippy	4m 13s
check Cargo.toml formatting	1m 19s
cargo test hash collisions (amd64)	7m 57s
	1h 46m 32s

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