Multi-key support for Global Secondary Index in Amazon DynamoDB

This article announces multi-attribute composite key support for DynamoDB Global Secondary Indexes, enabling up to 8 attributes (4 partition keys and 4 sort keys) per GSI.

• GSIs now support up to four partition keys and four sort keys for flexible multi-dimensional queries
• Eliminates need for application-level attribute concatenation workarounds
• Each attribute maintains native data types (string, number, binary) without conversion
• Query patterns support equality on all partition keys, with range conditions on last sort key only
• Enables intelligent sharding techniques to reduce hot partition risks at scale
• Feature available at no additional cost beyond standard GSI pricing
• Practical example shows orders dashboard querying by customer, status, date, and amount

This feature simplifies DynamoDB data modeling by allowing native multi-attribute queries without concatenation, improving application efficiency and reducing complexity.