Summary of Changes

Adds the ability to have a header in the generated dropdown list as per the documentation https://docs.joomla.org/SQL_form_field_type

Testing Instructions

Create an sql custom field with a simple query eg select a.id as value, a.title as text from uajp8_content as a

Actual result BEFORE applying this Pull Request

Open an article and check the new field - it will be a dropdown list with the first item in the list displayed.
As a result when you save the article that first item will be saved and will therefore be displayed on the front end.

Expected result AFTER applying this Pull Request

There is now an additional param in the field called Header
You can use this to add a header to the dropdown list that has no value eg "- Select something -"
Open an article and check the new field - it will be a dropdown list with the first item in the list being the content you entered in the header field.
As a result when you save the article the field will have no value and will therefore not be displayed on the front end.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed