Ted-Jiang commented on issue #2092:
URL:
https://github.com/apache/arrow-datafusion/issues/2092#issuecomment-1080290202
@yjshen i think it already in ballista
```
C02DM20AMD6T arrow-datafusion % cargo run --bin datafusion-cli --features
ballista -- --host localhost --port 50050
Compiling ballista-core v0.6.0
(/Users/yangjiang/CLionProjects/github/arrow-datafusion/ballista/rust/core)
Compiling ballista v0.6.0
(/Users/yangjiang/CLionProjects/github/arrow-datafusion/ballista/rust/client)
Compiling datafusion-cli v7.0.0
(/Users/yangjiang/CLionProjects/github/arrow-datafusion/datafusion-cli)
Finished dev [unoptimized + debuginfo] target(s) in 16.47s
Running `target/debug/datafusion-cli --host localhost --port 50050`
DataFusion CLI v7.0.0
❯ select substr('alphabet', 3,2);
+--------------------------------------------+
| substr(Utf8("alphabet"),Int64(3),Int64(2)) |
+--------------------------------------------+
| ph |
+--------------------------------------------+
1 row in set. Query took 0.231 seconds.
❯
```
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