villebro opened a new pull request, #20123:
URL: https://github.com/apache/superset/pull/20123

   ### SUMMARY
   
   #19917 migrated the `convert_dttm` functions in the Presto and Trino db 
engine specs to use the currently recommended literal timestamp type cast over 
the now deprecated `from_iso8601_*` functions. However, the new literal casts 
require the separator to be a blank space instead of the "T" separator:
   
   - https://trino.io/docs/current/functions/datetime.html
   - https://prestodb.io/docs/current/functions/datetime.html
   
   This PR updates the format to correspond with the supported format and 
updates the unit tests accordingly.
   
   ### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF
   <!--- Skip this if not applicable -->
   
   ### TESTING INSTRUCTIONS
   <!--- Required! What steps can be taken to manually verify the changes? -->
   
   ### ADDITIONAL INFORMATION
   <!--- Check any relevant boxes with "x" -->
   <!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
   - [ ] Has associated issue:
   - [ ] Required feature flags:
   - [ ] Changes UI
   - [ ] Includes DB Migration (follow approval process in 
[SIP-59](https://github.com/apache/superset/issues/13351))
     - [ ] Migration is atomic, supports rollback & is backwards-compatible
     - [ ] Confirm DB migration upgrade and downgrade tested
     - [ ] Runtime estimates and downtime expectations provided
   - [ ] Introduces new feature or API
   - [ ] Removes existing feature or API
   


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