ike560 opened a new issue, #3922:
URL: https://github.com/apache/arrow-datafusion/issues/3922
**Describe the bug**
The following error occurs in cast of timestamp.
Exception: Internal error: Unsupported CAST from Timestamp(Microsecond,
None) to Int32. This was likely caused by a bug in DataFusion's code and we
would welcome that you file an bug report in our issue tracker
**To Reproduce**
```py
import datafusion
ctx = datafusion.SessionContext()
ctx.register_parquet('nyc_taxi', 'nyc_taxi.parquet')
sql = '''
WITH a AS
(SELECT
tpep_pickup_datetime,
tpep_dropoff_datetime,
CAST(tpep_pickup_datetime AS INTEGER) AS pickup,
CAST(tpep_dropoff_datetime AS INTEGER) AS dropoff
FROM nyc_taxi)
SELECT
CAST(AVG(dropoff - pickup) AS NUMERIC(5, 2))
FROM a
'''
df = ctx.sql(sql)
df.show()
```
---------------------------------------------------------------------------
Exception Traceback (most recent call last)
Input In [5], in <module>
4 sql = '''
5 WITH a AS
6 (SELECT
(...)
14 FROM a
15 '''
16 df = ctx.sql(sql)
---> 17 df.show()
Exception: Internal error: Unsupported CAST from Timestamp(Microsecond,
None) to Int32. This was likely caused by a bug in DataFusion's code and we
would welcome that you file an bug report in our issue tracker
**Additional context**
Latest version : datafusion 0.6.0 (python)
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