You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2021/04/07 18:24:00 UTC
[jira] [Created] (ARROW-12277) [Rust][DataFusion] Aggregates are
not supported for timestamp types
Andrew Lamb created ARROW-12277:
-----------------------------------
Summary: [Rust][DataFusion] Aggregates are not supported for timestamp types
Key: ARROW-12277
URL: https://issues.apache.org/jira/browse/ARROW-12277
Project: Apache Arrow
Issue Type: Improvement
Reporter: Andrew Lamb
Assignee: Andrew Lamb
If you try and aggregate (via SUM, for example) a column of a timestamp type, it generates an error:
```
Coercion from [Timestamp(Nanosecond, None)] to the signature Uniform(1, [Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Float32, Float64]) failed.
```
For example:
{code}
> show columns from t;
+---------------+--------------+------------+-------------+-----------------------------+-------------+
| table_catalog | table_schema | table_name | column_name | data_type | is_nullable |
+---------------+--------------+------------+-------------+-----------------------------+-------------+
| datafusion | public | t | a | Utf8 | NO |
| datafusion | public | t | b | Timestamp(Nanosecond, None) | NO |
+---------------+--------------+------------+-------------+-----------------------------+-------------+
2 row in set. Query took 0 seconds.
> select sum(b) from t;
Plan("Coercion from [Timestamp(Nanosecond, None)] to the signature Uniform(1, [Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Float32, Float64]) failed.")
{code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)