Ted-Jiang commented on a change in pull request #2108:
URL: https://github.com/apache/arrow-datafusion/pull/2108#discussion_r837294373
##########
File path: datafusion-common/src/dfschema.rs
##########
@@ -281,6 +281,14 @@ impl DFSchema {
.all(|(dffield, arrowfield)| dffield.name() == arrowfield.name())
}
+ /// Check to see if df field data types in df schema matches with input df
schema
+ pub fn matches_arrow_schema_with_type(&self, df_schema: &DFSchema) -> bool
{
+ self.fields
+ .iter()
Review comment:
in postgresql union support type cast like below
```
postgres=# select '1.2' as a union select 2.3 as b union select 3 as b ;
a
-----
2.3
3
1.2
(3 rows)
postgres=# \gdesc
Column | Type
--------+---------
a | numeric
(1 row)
```
Maybe we can open a ticket support this ?
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