milvus

Highlights

• Completes Go SDK (client/v2) struct-array support, especially vector sub-fields and EmbeddingList/MAX_SIM search.
• Fixes custom gRPC DialOptions so they no longer drop the SDK's default keepalive, backoff, and max receive message-size settings.

New Features

• Struct-array vector sub-field columns: Added vector-array column types for struct-array vector sub-fields: ColumnFloatVectorArray, ColumnFloat16VectorArray, ColumnBFloat16VectorArray, ColumnBinaryVectorArray, and ColumnInt8VectorArray. These support ArrayOfVector sub-fields inside struct arrays. (#49164)

• EmbeddingList search vector types: Added entity.FloatVectorArray, entity.Float16VectorArray, entity.BFloat16VectorArray, entity.BinaryVectorArray, and entity.Int8VectorArray, dispatching them to the matching PlaceholderType_EmbList* values. This enables MAX_SIM / EmbeddingList search against struct-array vector sub-fields such as clips[clip_emb]. (#49164)

• Struct-array insert/upsert helper: Added WithStructArrayColumn(name, structSchema, rows) to column-based insert/upsert options. The helper accepts []map[string]any row data and infers scalar/vector sub-column types from the provided struct schema. (#49164)

• gRPC authority configuration: Added ClientConfig.WithGrpcAuthority(authority) for proxy-based routing through the gRPC :authority header. (#49186)

Bug Fixes

• Default gRPC dial options are preserved: Client.dialOptions() now always applies DefaultGrpcOpts before user-provided DialOptions, retaining SDK defaults for keepalive, backoff, and max receive message size while still allowing caller overrides. (#49186, issue #48828)

• Struct-array schema validation: Added Schema.Validate() and StructSchema.Validate() and wired validation into CreateCollection. Invalid struct-array sub-fields are rejected before the RPC, including nested array/struct fields, sparse vector sub-fields, duplicate sub-field names, and top-level-only flags such as primary key, partition key, clustering key, nullable, default value, dynamic, and autoID. (#49164, issue #49163)

• Struct-array schema round trip: Schema.ReadProto() now restores StructArrayFields, and ProtoMessage() preserves max_capacity by propagating the parent setting to sub-fields when needed. Array / ArrayOfVector wrappers from the server are unwrapped back to user-facing scalar/vector sub-field types. (#49164)

• Struct-array write correctness: columnStructArray now enforces equal lengths across sub-fields, appends a row atomically with rollback on partial sub-field failure, and serializes top-level struct-array field data as DataType_ArrayOfStruct. (#49164)

• Vector-array response decoding: Query/search result decoding now handles DataType_ArrayOfVector, validates nil vector rows, validates payload lengths against dimension/width, rejects invalid binary vector dimensions, and preserves vector-array sub-field data in Go column types. (#49164)

• Builder error handling: WithStructArrayColumn stores construction errors and returns them from InsertRequest / UpsertRequest instead of panicking during chained builder calls. (#49164)

Contributors

• @zhuwenxing
• @liliu-z
• @milanchovatiya-boop