amazon web services - DynamoDB: Insert a new Row with unique GSI -


i using dynamodbmapper insert new object table. table structure:

key: hash_key attribute1: global sec index other attributes

now want value of attribute1 unique in table. how that?

already tried:

a. map.put("attribute1", new expectedattributevalue(false)); b. map.put("atrribute1", new expectedattributevalue().withexists(false));

i using mapper.save() default savebehaviour.

you cannot gsi. index not nothing uniqueness. indexes table faster lookup based on attribute

also see: dynamodb key uniqueness across primary , global secondary index


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