Loki query to find difference between 2 timestamps

[clevernessisamyth]

I got it working:

Follow these steps:

I used pattern in the query to capture the values of DATE and internalUUID:

{logs="java"} | pattern `<DATE> INFO <_> internalUUID: <internalUUID>, <_>`

And then I did these transformations in order:

1. Extract the labels to fields.
2. Group by the interlanUUID and include all the values of DATE.
3. The resulted column is an Array containing the Start Time and End Time. Extract it to fields.
4. Organize the fields: Reorder the fields, rename the Time fields and hide the Array field.
5. Cast the fields to time to calculate the difference between the End Time and First Time.
6. Cast the fields back to string to display the fractions of the seconds.

*The time format used for both Casts is YYYY-MM-DD hh:mm:ss.SSS