The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/15/bug-reporting.html Description:
I think the manual's description of the round function with numeric as an argument is different from the actual behavior. manual https://www.postgresql.org/docs/15/functions-math.html Explanation of the manual's ROUND function round ( numeric ) → numeric round ( double precision ) → double precision Rounds to nearest integer. For numeric, ties are broken by rounding away from zero. For double precision, the tie-breaking behavior is platform dependent, but “round to nearest even” is the most common rule. round(42.4) → 42 Operation of the ROUND function postgres=# SELECT round(CAST(42.5 AS numeric)); round ------- 43 (1 row) I am thinking that the value of the ROUND function with NUMERIC as an argument is rounded off, not rounded away from zero.
