[GitHub] [pinot] siddharthteotia commented on a diff in pull request #8953: Add multi-value noDict APIs and their implementation for querying immutable and mutable fixed-width segment types

[GitBox <gi...@apache.org>]

siddharthteotia commented on code in PR #8953:
URL: https://github.com/apache/pinot/pull/8953#discussion_r909088699


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pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/creator/impl/fwd/MultiValueFixedByteRawIndexCreator.java:
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@@ -77,7 +77,8 @@ public MultiValueFixedByteRawIndexCreator(File baseIndexDir, ChunkCompressionTyp
       boolean deriveNumDocsPerChunk, int writerVersion)
       throws IOException {
     File file = new File(baseIndexDir, column + Indexes.RAW_MV_FORWARD_INDEX_FILE_EXTENSION);
-    int totalMaxLength = maxNumberOfMultiValueElements * valueType.getStoredType().size();
+    // Store the length followed by the values
+    int totalMaxLength = Integer.BYTES + (maxNumberOfMultiValueElements * valueType.getStoredType().size());

Review Comment:
   Just noticed this. I wonder how the reader was working before because without this change, looks like we can't correctly deserialize / read the bytes written by MV raw index writer ?



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