From dbc31164053bc9d0c1049012fe818fc45e9255ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=91=A8=E6=B2=9B=E8=BE=B0?=
 <45144903+choubenson@users.noreply.github.com>
Date: Wed, 31 Jan 2024 19:56:55 +0800
Subject: [PATCH] Add comments

---
 .../apache/tsfile/file/metadata/AlignedTimeSeriesMetadata.java | 1 +
 .../main/java/org/apache/tsfile/read/TsFileSequenceReader.java | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/tsfile/src/main/java/org/apache/tsfile/file/metadata/AlignedTimeSeriesMetadata.java b/tsfile/src/main/java/org/apache/tsfile/file/metadata/AlignedTimeSeriesMetadata.java
index 14f1d4a67..583f08eac 100644
--- a/tsfile/src/main/java/org/apache/tsfile/file/metadata/AlignedTimeSeriesMetadata.java
+++ b/tsfile/src/main/java/org/apache/tsfile/file/metadata/AlignedTimeSeriesMetadata.java
@@ -155,6 +155,7 @@ public List<AlignedChunkMetadata> getChunkMetadataList() {
     return getAlignedChunkMetadata(timeChunkMetadata, valueChunkMetadataList);
   }
 
+  /** Notice: if all the value chunks is empty chunk, then return empty list. */
   private List<AlignedChunkMetadata> getAlignedChunkMetadata(
       List<IChunkMetadata> timeChunkMetadata, List<List<IChunkMetadata>> valueChunkMetadataList) {
     List<AlignedChunkMetadata> res = new ArrayList<>();
diff --git a/tsfile/src/main/java/org/apache/tsfile/read/TsFileSequenceReader.java b/tsfile/src/main/java/org/apache/tsfile/read/TsFileSequenceReader.java
index 6479e2fc0..5a934a609 100644
--- a/tsfile/src/main/java/org/apache/tsfile/read/TsFileSequenceReader.java
+++ b/tsfile/src/main/java/org/apache/tsfile/read/TsFileSequenceReader.java
@@ -2078,7 +2078,8 @@ public List<ChunkMetadata> getChunkMetadataList(Path path) throws IOException {
   }
 
   /**
-   * Get AlignedChunkMetadata of sensors under one device
+   * Get AlignedChunkMetadata of sensors under one device. Notice: if all the value chunks is empty
+   * chunk, then return empty list.
    *
    * @param device device name
    */