MallikarjunaReddyN opened a new issue, #42679:
URL: https://github.com/apache/superset/issues/42679
### Bug description
When configuring a **Custom Timestamp Native Filter** on a dashboard, the
filter allows users to select the same value for both the Start and End
timestamps.
The filter is accepted without any validation or warning. After applying the
filter, the dashboard executes the query and returns an empty result set.
This behavior is confusing because the UI does not indicate that the
selected range is effectively empty.
**Current Behavior**
The filter accepts identical start and end timestamps without any validation.
The dashboard executes the query and returns an empty result set without
informing the user that the selected time range is empty.
**Expected Behavior**
One of the following should happen:
- The UI should prevent applying the filter when the start and end
timestamps are identical by displaying a validation message such as:
`Start timestamp must be earlier than end timestamp.`
OR
- The UI should clearly indicate that the selected time range is empty
before executing the query.
At a minimum, users should receive feedback explaining why no results are
returned instead of silently executing an empty-range query.
### Screenshots/recordings
_No response_
### Superset version
master / latest-dev
### Python version
3.11
### Node version
18 or greater
### Browser
Chrome
### Additional context
_No response_
### Checklist
- [x] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [x] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [x] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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