fixup! my_concat #234

Job	Run time
cargo test (macos)	9m 23s
build with wasm-pack	2m 28s
cargo check	6m 0s
Check cargo fmt	34s
cargo test (macos-aarch64)	12m 2s
Verify MSRV (Min Supported Rust Version)	8m 3s
Verify Vendored Code	51s
cargo test (win64)	44m 51s
check configs.md is up-to-date	2m 48s
clippy	2m 19s
check Cargo.toml formatting	2m 56s
cargo test hash collisions (amd64)	14m 52s
cargo doc	3m 59s
cargo test (amd64)	10m 0s
cargo test datafusion-cli (amd64)	55s
cargo test doc (amd64)	15m 12s
cargo examples (amd64)	14m 7s
Run sqllogictest with Postgres runner	3m 33s
cargo test pyarrow (amd64)	2m 51s
verify benchmark results (amd64)	12m 38s
	2h 50m 22s

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