v.21.9Improvement

Remove Duplicate Index Analysis and Validity Checks during Projection Analysis

Remove duplicate index analysis and avoid possible invalid limit checks during projection analysis. #27742 (Amos Bird).
Removal of duplicate index analysis and prevention of possible invalid limit checks during projection analysis in ClickHouse query processing.

Why it matters

This feature addresses redundant index analysis steps and resolves potential issues with invalid limit checks when analyzing projections, improving query planning accuracy and execution reliability.

How to use it

This improvement is internal to the query analysis process and requires no action from users; it automatically enhances projection and limit analysis in queries.