[jira] [Created] (FLINK-21236) Don't explicitly use HeapMemorySegment in row format serde

[Shang Yuanchun (Jira)]

Kurt Young created FLINK-21236:
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             Summary: Don't explicitly use HeapMemorySegment in row format serde
                 Key: FLINK-21236
                 URL: https://issues.apache.org/jira/browse/FLINK-21236
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner
    Affects Versions: 1.12.0
            Reporter: Kurt Young
             Fix For: 1.13.0


`RawFormatDeserializationSchema` and `RawFormatSerializationSchema` explicitly used `HeapMemorySegment`, and in a typical batch job, `HybridMemorySegment` will also be loaded and used as managed memory. This will prevent Class Hierarchy Analysis (CHA) to optimize the function call of MemorySegment. More details can be found here: [https://flink.apache.org/news/2015/09/16/off-heap-memory.html]

We can use `ByteBuffer` instead of `HeapMemorySegment`.



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