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Posted to commits@doris.apache.org by GitBox <gi...@apache.org> on 2021/11/08 08:44:20 UTC
[GitHub] [incubator-doris] BiteTheDDDDt opened a new issue #7044: [Feature] make BinaryPredicate do not cast date to datetime/varchar
BiteTheDDDDt opened a new issue #7044:
URL: https://github.com/apache/incubator-doris/issues/7044
### Search before asking
- [X] I had searched in the [issues](https://github.com/apache/incubator-doris/issues?q=is%3Aissue) and found no similar issues.
### Description
Cast date to datetime is useless cast.
### Use case
```sql
+------------------+-------------+------+-------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
| lo_commitdate | INT | No | false | NULL | NONE |
+------------------+-------------+------+-------+---------+-------+
select sum(cast (cast(lo_commitdate as date) <= cast(lo_commitdate as date) as tinyint)) from lineorder;
```
At this case, lo_commitdate will be cast like `INT -> DATE -> DATETIME`.
We can just do compute betwheen two date type elements, it can speed up `50%` this query.
### Related issues
_No response_
### Are you willing to submit PR?
- [X] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct)
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[GitHub] [incubator-doris] morningman closed issue #7044: [Feature] make BinaryPredicate do not cast date to datetime/varchar
Posted by GitBox <gi...@apache.org>.
morningman closed issue #7044:
URL: https://github.com/apache/incubator-doris/issues/7044
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