andygrove opened a new issue, #6381:
URL: https://github.com/apache/arrow-rs/issues/6381
**Describe the bug**
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I have code that calls `cast_with_options` to cast `Decimal128(7, 2)` to
`Dictionary<Int32, Decimal128(7,2)>` but it actually produces
`Dictionary<Int32, Decimal128(38, 10)>`.
I can see that this is because we ignore the precision and scale in the code
in `cast_to_dictionary`:
```rust
Decimal128(_, _) => {
pack_numeric_to_dictionary::<K, Decimal128Type>(array,
dict_value_type, cast_options)
}
```
**To Reproduce**
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**Expected behavior**
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**Additional context**
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