Page History

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1. Update InsertRequest in milvus.proto, change Insert to use Arrow format
2. Update SearchRequest/Hits in milvus.proto, and SearchResultData in schema.proto, change Search to use Arrow format
3. Update QueryResults in milvus.proto, change Query to use Arrow format

Stage 2

1. Update Storage module to use GoArrow to write Parquet from Arrow, or read Arrow from Parquet directly. Write one Segment into one Parquet file.

Stage 2

1. Upgrade C, remove C++ Arrow module used in Storage from version 2.0.0 to 5.0.0
2. Remove all internal row-based data structure, including "RowData" in internalpb.InsertRequest, "row_data" in milvuspb.Hits, "row_data_" in C++ SearchResult.
3. Optimize search result flow

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