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describeIndex()

This operation describes a specific index.

public DescribeIndexResp describeIndex(DescribeIndexReq request)

Request Syntax​

describeIndex(DescribeIndexReq.builder()
    .collectionName(String collectionName)
    .fieldName(String fieldName)
    .indexName(String indexName)
    .build()
)

BUILDER METHODS:

  • collectionName(String collectionName)

    The name of an existing collection.

    Setting this to a non-existing collection results in MilvusException.

  • fieldName(String fieldName)

    The name of the field on which the index is created.

  • indexName(String indexName)

    The name of the index to describe.

    Setting this to a non-existing collection results in MilvusException.

RETURN TYPE:

DescribeIndexResp

RETURNS:

A DescribeIndexResp object that contains the details of the specified index.

PARAMETERS:

  • indexName (String)

    The name of the created index.

  • indexType (String)

    The algorithm that is used to build the index.

    On Zilliz Cloud, the value is always AUTOINDEX. For details, refer to AUTOINDEX Explained.

  • metricType (String)

    The algorithm that is used to measure similarity between vectors. Possible values are IP, L2, and COSINE.

    This is available only when the specified field is a vector field.

  • fieldName (String)

    The name of the field on which the index has been created.

EXCEPTIONS:

  • MilvusClientExceptions

    This exception will be raised when any error occurs during this operation.

Example​

import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;
import io.milvus.v2.service.index.request.DescribeIndexReq;
import io.milvus.v2.service.index.response.DescribeIndexResp;

// 1. Set up a client
ConnectConfig connectConfig = ConnectConfig.builder()
        .uri("YOUR_CLUSTER_ENDPOINT")
        .token("YOUR_CLUSTER_TOKEN")
        .build();
        
MilvusClientV2 client = new MilvusClientV2(connectConfig);

// 2. Describe the index for the field "vector"
DescribeIndexReq describeIndexReq = DescribeIndexReq.builder()
        .collectionName("test")
        .fieldName("vector")
        .build();
DescribeIndexResp describeIndexResp = client.describeIndex(describeIndexReq);