jiacai2050 opened a new issue #1806:
URL: https://github.com/apache/arrow-datafusion/issues/1806
**Describe the bug**
```rust
// DataFusion
pub struct DFSchema {
/// Fields
fields: Vec<DFField>,
}
// Arrow
pub struct Schema {
pub(crate) fields: Vec<Field>,
/// A map of key-value pairs containing additional meta data.
#[serde(skip_serializing_if = "HashMap::is_empty")]
#[serde(default)]
pub(crate) metadata: HashMap<String, String>,
}
```
There is no place to keep metadata
**Expected behavior**
metadata should be kept during convert.
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