@saradev’s docs here Utilizing Parameters in Data Explorer Queries highlights the full list of params for data explorer that sometimes have a dropdown, and sometimes do not. (Parameter list on Github)
Here’s a table of params, also indicating if it has a specific control for it.
| param | dropdown available |
|---|---|
| int |  |
| bigint | |
| boolean | |
| null boolean | |
| string | |
| date | |
| time | |
| datetime | |
| double | |
| user_id | |
| post_id | |
| topic_id | |
| string_list | |
| category_id | |
| group_id | |
| int_list | |
| string_list | |
| user_list | |
| group_list | |
Ideally the dropdowns used and shown in data explorer would have similar look and feel as the core app. Let us figure out how we can do this.