duongcongtoai commented on issue #14218:
URL: https://github.com/apache/datafusion/issues/14218#issuecomment-2628645012
and i don't think this error is caused by unnest, for example with this new
plan
```
let plan =
LogicalPlanBuilder::scan("t",
Arc::new(DefaultTableSource::new(provider)), None)?
.filter(binary_expr(
col("column1"),
datafusion_expr::Operator::Gt,
lit(ScalarValue::new_utf8("some_val")),
))?
// .unnest_column("arr_col")?
.build()?;
```
It will throw the same error because datafusion cannot handle the type
difference at execution time, meaning the table provider should correctly
provide the type for column `column1` for type_coercion to happen (at plan time)
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