Supported Data Types - Amazon DynamoDB

Supported Data Types

This section describes the supported primitive Java data types, collections, and arbitrary data types in Amazon DynamoDB.

Amazon DynamoDB supports the following primitive Java data types and primitive wrapper classes.

  • String

  • Boolean, boolean

  • Byte, byte

  • Date (as ISO_8601 millisecond-precision string, shifted to UTC)

  • Calendar (as ISO_8601 millisecond-precision string, shifted to UTC)

  • Long, long

  • Integer, int

  • Double, double

  • Float, float

  • BigDecimal

  • BigInteger


For more information about DynamoDB naming rules and the various supported data types, see Naming Rules and Data Types.

DynamoDB supports the Java Set, List, and Map collection types. The following table summarizes how these Java types map to the DynamoDB types.

Java type DynamoDB type

All number types

N (number type)


S (string type)

Boolean BOOL (Boolean type), 0 or 1.
ByteBuffer B (binary type)
Date S (string type). The Date values are stored as ISO-8601 formatted strings.
Set collection types SS (string set) type, NS (number set) type, or BS (binary set) type.

The DynamoDBTypeConverter interface lets you map your own arbitrary data types to a data type that is natively supported by DynamoDB. For more information, see Mapping Arbitrary Data.