Query Global Secondary Index in DynamoDB Using Java (Guide w/ Code Examples)

Provided by Rafal Wilinski
To query a global secondary index (GSI) in a DynamoDB table in Java, you can use the query
method of the AmazonDynamoDB
client by providing the GSI Name, Table Name, and Key Condition Expression.
In the below example, YourTableName
is the name of the table that contains the GSI you want to query, YourGSI
is the name of the GSI you want to query, GSIKeyAttribute
is the name of the key attribute on the GSI, and YourSearchValue
is the value you want to search for in the GSI.
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB; import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClientBuilder; import com.amazonaws.services.dynamodbv2.model.Attribute.Attributevalue; import com.amazonaws.services.dynamodbv2.model.queryrequest; import com.amazonaws.services.dynamodbv2.model.queryresult; public class DynamoDBQueryGSIExample { public static void main(String[] args) { AmazonDynamoDB client = AmazonDynamoDBClientBuilder.defaultClient(); QueryRequest request = new QueryRequest() .withTableName("YourTableName") .withIndexName("YourGSI") .withKeyConditionExpression("GSIKeyAttribute = :value") .withExpressionAttributeValues( new AttributeValue().withS(":value", "YourSearchValue")); QueryResult result = client.query(request); System.out.println("Query successful!"); System.out.println(result); } }
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