## Description
This is a follow-up to
https://github.com/appsmithorg/appsmith/issues/23960.
In above issue, we picked the first available entity (table/collection,
etc) and show the user a read query by default. With a [[real
datasource](https://www.notion.so/7b5b3f6302cc4a8e93f8ecd1a3965cad?pvs=21)](https://www.notion.so/7b5b3f6302cc4a8e93f8ecd1a3965cad?pvs=21),
it is not possible to know which is the most meaningful entity to
choose. However, with mock datasources, we do have the option because we
own the underlying databases.
This PR adds that functionality, In case of Users mock DB, we will
populate the query editor with `select * from public.users limit 10`, as
Users mock DB contains users table.
#### PR fixes following issue(s)
Fixes#25247
> if no issue exists, please create an issue and ask the maintainers
about this first
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#### Media
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#### Type of change
- New feature (non-breaking change which adds functionality)
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## Testing
>
#### How Has This Been Tested?
> Please describe the tests that you ran to verify your changes. Also
list any relevant details for your test configuration.
> Delete anything that is not relevant
- [x] Manual
- [ ] Jest
- [x] Cypress
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#### Test Plan
> Add Testsmith test cases links that relate to this PR
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#### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
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## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
#### QA activity:
- [x] [Speedbreak
features](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#speedbreakers-)
have been covered
- [x] Test plan covers all impacted features and [areas of
interest](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#areas-of-interest-)
- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [x] Manually tested functionality on DP
- [ ] We had an implementation alignment call with stakeholders post QA
Round 2
- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed
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Co-authored-by: “sneha122” <“sneha@appsmith.com”>
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