We will only pursue ideas on this list that provide more info about the feasibility of index-based CE, based on our initial findings from the perf/accuracy testing. We will re-run the perf/accuracy benchmarks to validate the below changes.

• Extend API to handle index bounds specified in reverse order
• Extend API to handle index bounds that are a union of single intervals & sum them. This would address CE for \$in
• Extend to support index-CE in sub-planning