Prepare for v2.4.0 (#337)

Signed-off-by: yhmo <[email protected]>

Author: yhmo

CHANGELOG.md

@@ -0,0 +1,55 @@
+# Changelog
+
+## milvus-sdk-cpp 2.4.0 (2025-09-19)
+### Feature
+- Add new index types(DISKANN/AUTOINDEX/SCANN/GPU_IVF_FLAT/GPU_IVF_PQ/GPU_BRUTE_FORCE/GPU_CAGRA/TRIE/STL_SORT/INVERTED/SPARSE_INVERTED_INDEX/SPARSE_WAND)
+- Add new metric types(COSINE)
+- Support CreateDatabase/DropDatabase/ListDatabases/AlterDatabase/DescribeDatabase/UsingDatabase interfaces
+- Support JSON field
+- Support Array field
+- Support dynamic field
+- Support SparseVector field
+- Support Float16Vector/BFloat16Vector field
+- Support Upsert interface
+- Support Consistency level
+- Support query by count(*)
+- Support GetLoadState interface
+- Support HybridSearch interface
+- Support row-based insert/upsert
+- Support DescribeAlias/ListAliases interfaces
+- Support AlterCollection/AlterCollectionField interfaces
+- Support AlterIndexProperties/DropIndexProperties interfaces
+- Support CreateResourceGroup/DropResourceGroup/UpdateResourceGroups/ListResourceGroups/DescribeResourceGroup interfaces
+- Support TransferNode/TransferReplica interfaces
+- Support CreateUser/UpdatePassword/DropUser/DescribeUser/ListUsers interfaces
+- Support CreateRole/DropRole/DescribeRole/ListRoles/GrantRole/RevokeRole interfaces
+- Support GrantPrivilege/RevokePrivilege/CreatePrivilegeGroup/DropPrivilegeGroup/ListPrivilegeGroups/AddPrivilegesToGroup/RemovePrivilegesFromGroup interfaces
+- Support QueryIterator/SearchIterator
+- Support CreateImportJobs/ListImportJobs/GetImportJobProgress interfaces
+
+
+### Improvement
+- Support connection with dbname
+- DropIndex() interface accepts index_name instead of field_name
+- Cache collection schema to reduce DescribeCollection call
+- Support search with grouping by field
+- Add retry machinery for rpc call
+- Add CurrentUsedDatabase method for MilvusClient
+- Add methods for QuertResults/SearchResults to return row-based results
+
+
+### Orther changes
+- Remove unsupported index types(IVF_HNSW/RHNSW_FLAT/RHNSW_SQ/RHNSW_PQ/ANNOY)
+- Remove unsupported metric types(TANIMOTO/SUBSTRUCTURE/SUPERSTRUCTURE)
+- Remove CalcDistance interface, not supported by milvus 2.4
+- Remove Flush call in GetCollectionStats/GetPartitionStats/CreateIndex, milvus 2.4 doesn't allow calling Flush constantly
+- Directly pass radius/range_filter for range search, no need to verify them on the client side
+- CreateIndex() internally calls DescribeIndex() to check index state instead of GetIndexState()
+- Remove client-side checks for index parameters and search parameters, let milvus server validate
+- Deprecate ShowCollections, replaced by ListCollections
+- Deprecate ShowPartitions, replaced by ListPartitions
+- Rename GetVersion to GetServerVersion
+- Link gRPC as shared library instead of static link
+- Optional to build with external pre-installed gRPC lib
+- Add more examples
+- Simplify the project to reduce dependencies, only one dependency(gRPC) now

README.md

@@ -12,17 +12,17 @@ To contribute to this project, please read our [contribution guidelines](https:/
 
 The following collection shows Milvus versions and recommended milvus-cpp-sdk versions:
 
-| Milvus version | Recommended SDK branch |
+| Milvus version | Recommended SDK version |
 |:-----:|:-----:|
-| 2.3.x | 2.3  |
-| 2.4.x | 2.4  |
+| 2.3.x | 2.3(branch)  |
+| 2.4.x | v2.4.0  |
 
 
 ## Installation
 
 
 ### Install from source
-See [Development Guide](DEVELOPMENT.md) for details on how to install from the source.
+See [Development Guide](DEVELOPMENT.md) for details on how to compile and install from the source.
 
 
 ## License