erratic-pattern commented on code in PR #10386:
URL: https://github.com/apache/datafusion/pull/10386#discussion_r1598743959
##########
datafusion/optimizer/src/simplify_expressions/expr_simplifier.rs:
##########
@@ -1670,17 +1734,106 @@ fn inlist_except(mut l1: InList, l2: InList) ->
Result<Expr> {
Ok(Expr::InList(l1))
}
+pub struct RewriteCycle {
+ consecutive_unchanged_count: usize,
+ total_iterations: usize,
+ num_rewriters: usize,
+}
+pub type RewriteCycleResult = ControlFlow<Result<Expr>, Expr>;
+
+impl RewriteCycle {
+ fn new() -> Self {
+ RewriteCycle {
+ // use usize::MAX as default to avoid checking null in is_done()
comparison
Review Comment:
> I think modeling this with `num_rewriters: Option<usize>` would make it
clearer what is going on and help the compiler check the logic
yes I tried to get too fancy here with micro-optimizations when I saw
benchmark regressions 😆
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org
For additional commands, e-mail: github-h...@datafusion.apache.org
