jayzhan211 opened a new issue, #12904:
URL: https://github.com/apache/datafusion/issues/12904
### Describe the bug
As title, I would like to store null value in the csv table but couldn't.
### To Reproduce
Write a csv file to `datafusion/core/tests/data/data.csv` with
```csv
c1,c2
NULL,'a'
```
```
statement ok
CREATE EXTERNAL TABLE t (
c1 INT,
c2 VARCHAR,
)
STORED AS CSV
LOCATION '../core/tests/data/data.csv'
OPTIONS ('format.has_header' 'true');
query error DataFusion error: Arrow error: Parser error: Error while parsing
value NULL for column 0 at line 1
select * from t;
```
### Expected behavior
Successfully store nulls for non-string type
### Additional context
String is fine
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