wangbo opened a new issue #3088: Support Java version 64 bits Integers for BITMAP type URL: https://github.com/apache/incubator-doris/issues/3088 **Why We Need a Java version 64 int bitmap** In the new Spark Load process,we want to support pre-aggregation of precise count distinct,that means we need to build bitmap in the Spark Load; But now 64 bits Integers RoaringBitmap doesn't support serialize and deserialize cross Java Version and C++ version,because they have different storage format. #2771 has fork and define a Doris owned bitmap format,but just C++ version. So we need a Java version that is compatible with it. **Solution** Fork a Roaring64NavigableMap; Rewrite its serialize/deserialize;
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