jayzhan211 commented on issue #10180:
URL: https://github.com/apache/datafusion/issues/10180#issuecomment-2074900564
> The main requirement I have now is that the error when you do try to
compare a union is more helpful and less ugly.
Do you mean the error message in `comparision_coerion`?
```
called `Result::unwrap()` on an `Err` value: Plan("Cannot infer common
argument type for comparison operation Union([(0, Field { name: \"null\",
data_type: Boolean, nullable: true, dict_id: 0, dict_is_ordered: false,
metadata: {} }), (1, Field { name: \"bool\", data_type: Boolean, nullable:
false, dict_id: 0, dict_is_ordered: false, metadata: {} }), (2, Field { name:
\"int\", data_type: Int64, nullable: false, dict_id: 0, dict_is_ordered: false,
metadata: {} }), (3, Field { name: \"float\", data_type: Float64, nullable:
false, dict_id: 0, dict_is_ordered: false, metadata: {} }), (4, Field { name:
\"string\", data_type: Utf8, nullable: false, dict_id: 0, dict_is_ordered:
false, metadata: {} }), (5, Field { name: \"array\", data_type: Utf8, nullable:
false, dict_id: 0, dict_is_ordered: false, metadata: {} }), (6, Field { name:
\"object\", data_type: Utf8, nullable: false, dict_id: 0, dict_is_ordered:
false, metadata: {} })], Sparse) = Int64")
```
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