Ted-Jiang opened a new issue #2125:
URL: https://github.com/apache/arrow-datafusion/issues/2125
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 ?
_Originally posted by @Ted-Jiang in
https://github.com/apache/arrow-datafusion/pull/2108#discussion_r837294373_
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