HaoYang670 opened a new issue, #3505:
URL: https://github.com/apache/arrow-datafusion/issues/3505
**Describe the bug**
Currently, when we get a config in invalid format, a default value will be
returned. I'm not sure whether this is user-friendly.
**To Reproduce**
Steps to reproduce the behavior:
```rust
#[test]
fn get_config_in_invalid_format() {
let config = ConfigOptions::new();
let key = "datafusion.execution.batch_size";
// this is great
assert!(config.get(key).is_some());
assert_eq!(8192, config.get_u64(key));
// these are weird
assert_eq!(false, config.get_bool(key));
assert_eq!("", config.get_string(key));
}
```
**Expected behavior**
Personally, I'd like the Datafusion to give some more precise information,
for example returning `None` or an error message.
**Additional context**
This is related to #3500.
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