[LucaCappelletti94]

SELECT interval(2) '1 day 01:23:45.6789' rendered as SELECT INTERVAL '1 day 01:23:45.6789', and PostgreSQL rounds the value differently without the precision. This fixes the PostgreSQL case of #2763. The generic INTERVAL (100) MINUTE case in the same issue already round-trips on main.

When the typed literal path sees INTERVAL with fields or a precision, it now builds a typed string with that DataType::Interval, rendered as INTERVAL(2) '...'.

https://www.postgresql.org/docs/current/datatype-datetime.html

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.09%. Comparing base (1071d75) to head (c96bc9e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2782   +/-   ##
=======================================
  Coverage   83.09%   83.09%           
=======================================
  Files          42       42           
  Lines       36261    36265    +4     
  Branches    36261    36265    +4     
=======================================
+ Hits        30130    30134    +4     
  Misses       2636     2636           
  Partials     3495     3495           

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