Unclear error message for a missing index/datasource in a query

[Abigael-JT]

Describe the bug

a dpl query without index or any data source whatsoever returns a somewhat unclear error message

%dpl
| eval _raw = "xyz"

Expected behavior

The error message should mention something about the missing index/datasource

How to reproduce

Run the above query

Screenshots

current error message:

'writeStream' can be called only on streaming Dataset/DataFrame;

Software version

Desktop (please complete the following information if relevant):

• OS:
• Browser:
• Version:

Additional context