Document decimal AVG wrapping arithmetic#23685
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Which issue does this PR close?
Rationale for this change
Decimal AVG intentionally uses wrapping arithmetic with a widened intermediate sum type. The existing direct
add_wrappingandsub_wrappingcalls made that invariant difficult to audit.What changes are included in this PR?
AVG(DISTINCT)decimal paths to use the helpers.Are these changes tested?
cargo fmt --all -- --checkcargo test -p datafusion-functions-aggregate avg --libcargo test -p datafusion-functions-aggregate-common avg_distinct --libcargo clippy -p datafusion-functions-aggregate-common --all-targets -- -D warningsAre there any user-facing changes?
No.