(paimon) branch master updated: [hotfix] Add comments in FileIndexEvaluator

[lzljs3620320]

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lzljs3620320 pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/paimon.git


The following commit(s) were added to refs/heads/master by this push:
     new 6117068e75 [hotfix] Add comments in FileIndexEvaluator
6117068e75 is described below

commit 6117068e75960814073020871d93d70661d3b03c
Author: JingsongLi <jingsongl...@gmail.com>
AuthorDate: Thu Aug 21 13:24:43 2025 +0800

    [hotfix] Add comments in FileIndexEvaluator
---
 .../src/main/java/org/apache/paimon/io/FileIndexEvaluator.java        | 4 ++++
 1 file changed, 4 insertions(+)

diff --git 
a/paimon-core/src/main/java/org/apache/paimon/io/FileIndexEvaluator.java 
b/paimon-core/src/main/java/org/apache/paimon/io/FileIndexEvaluator.java
index 0a5505d48d..025887cefc 100644
--- a/paimon-core/src/main/java/org/apache/paimon/io/FileIndexEvaluator.java
+++ b/paimon-core/src/main/java/org/apache/paimon/io/FileIndexEvaluator.java
@@ -74,6 +74,10 @@ public class FileIndexEvaluator {
                 result = predicate.evaluate(filter);
                 result.and(selection);
             } else if (topN != null) {
+                // 1. TopN cannot work with filter, because a filter may not 
completely filter out
+                // all records, any unfiltered records can affect the 
calculation results of TopN
+                // 2. evaluateTopN with selection, because we must filter out 
the data based on
+                // deletion vector before selecting TopN records.
                 result = predicate.evaluateTopN(topN, selection);
             } else {
                 return FileIndexResult.REMAIN;