getPartitionStatistics()

A MilvusClient interface. This method shows the statistical information of a specified partition.

R<GetPartitionStatisticsResponse> getPartitionStatistics(GetPartitionStatisticsParam requestParam);

GetPartitionStatisticsParam

Use the GetPartitionStatisticsParam.Builder to construct a GetPartitionStatisticsParamobject.

import io.milvus.param.GetPartitionStatisticsParam;
GetPartitionStatisticsParam.Builder builder = GetPartitionStatisticsParam.newBuilder();

Methods of GetPartitionStatisticsParam.Builder:

Method	Description	Parameters
withCollectionName(String collectionName)	Sets the collection name. The collection name cannot be empty or null.	collectionName: The name of the collection whose partition statistical information needs to be checked.
withPartitionName(String partitionName)	Sets the partition name. The partition name cannot be empty or null.	partitionName: The name of the partition whose statistical information needs to be checked.
withFlush(Boolean flush)	Request a flush action before retrieving partition statistics. The value is True by default.	flush: Set the value to True to request a flush action.
build()	Constructs a GetPartitionStatisticsParam object.	N/A

The GetPartitionStatisticsParam.Builder.build() can throw the following exceptions:

• ParamException: error if the parameter is invalid.

Returns

This method catches all the exceptions and returns an R<GetPartitionStatisticsResponse> object.

• If the API fails on the server side, it returns the error code and message from the server.

• If the API fails by RPC exception, it returns R.Status.Unknow and the error message of the exception.

• If the API succeeds, it returns a valid GetPartitionStatisticsResponse held by the R template. You can use GetPartStatResponseWrapper to get statistics easily.

GetPartStatResponseWrapper

A tool class to encapsulate the GetPartitionStatisticsResponse.

import io.milvus.response.GetPartStatResponseWrapper;
GetPartStatResponseWrapper wrapper = new GetPartStatResponseWrapper(partStatResponse);

Methods of GetPartStatResponseWrapper:

Method	Description	Returns
getRowCount()	Gets the row count of a partition. NumberFormatException is thrown if the row count string is illegal.	long

Example

import io.milvus.param.*;
import io.milvus.grpc.GetPartitionStatisticsResponse;
import io.milvus.response.GetPartStatResponseWrapper;

GetPartitionStatisticsParam param = GetPartitionStatisticsParam.newBuilder()
        .withCollectionName(collectionName)
        .withPartitionName("_default")
        .build();
R<GetPartitionStatisticsResponse> response = client.getPartitionStatistics(param);
if (response.getStatus() != R.Status.Success.getCode()) {
    System.out.println(response.getMessage());
}

GetPartStatResponseWrapper wrapper = new GetPartStatResponseWrapper(response.getData());
System.out.println("Partition row count: " + wrapper.getRowCount());