erratic-pattern commented on code in PR #10386: URL: https://github.com/apache/datafusion/pull/10386#discussion_r1598746736
########## 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 `cycle_length` would also be a more clear name for this variable 🤔 I think it is confusing that it is only initialized after the first iteration -- 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