shyjsarah opened a new pull request, #8799:
URL: https://github.com/apache/paimon/pull/8799

   ### Purpose
   
   `NativeVectorGlobalIndexReader` receives destination buffers from the native 
vector index callback. The current vectored-read path allocates a second byte 
array for every range and then copies the data into those destination buffers.
   
   This change:
   
   - allows a `FileRange` to be backed by a caller-provided byte array;
   - makes sequential, single-range, and combined-range vectored reads fill 
that buffer directly;
   - removes the extra allocation and `System.arraycopy` from native vector 
index reads;
   - preserves the existing `CompletableFuture<byte[]>` contract by completing 
it with the same provided buffer.
   
   ### Tests
   
   - `mvn -B -ntp -pl paimon-common,paimon-vector -am -DskipITs 
-Dtest=VectoredReadUtilsTest,SeekableStreamVectorIndexInputTest 
-Dsurefire.failIfNoSpecifiedTests=false test`


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