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Posted to issues@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2021/04/12 13:09:00 UTC
[jira] [Created] (ARROW-12339) [Rust][DataFusion] COUNT DISTINCT
does not support for `Boolean`
Andrew Lamb created ARROW-12339:
-----------------------------------
Summary: [Rust][DataFusion] COUNT DISTINCT does not support for `Boolean`
Key: ARROW-12339
URL: https://issues.apache.org/jira/browse/ARROW-12339
Project: Apache Arrow
Issue Type: Improvement
Components: Rust - DataFusion
Reporter: Andrew Lamb
If you try to run a `COUNT (DISTINCT ..)` query on a float column you get the following error:
thread 'tokio-runtime-worker' panicked at 'Unexpected DataType for list', datafusion/src/scalar.rs:342:22
Reproducer:
{code}
echo "foo,1.23" > /tmp/foo.csv
./target/debug/datafusion-cli
> CREATE EXTERNAL TABLE t (a varchar, b float) STORED AS CSV LOCATION '/tmp/foo.csv';
0 rows in set. Query took 0 seconds.
> select count(distinct a) from t;
+-------------------+
| COUNT(DISTINCT a) |
+-------------------+
| 1 |
+-------------------+
1 rows in set. Query took 0 seconds.
> select count(distinct b) from t;
thread 'tokio-runtime-worker' panicked at 'Unexpected DataType for list', datafusion/src/scalar.rs:342:22
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
ArrowError(ExternalError(Canceled))
{code}
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