SCAN by Key Attribute in DynamoDB

Question

I need to execute an IN query on a key attribute. Since Query does not provide an IN clause, I plan to use Scan. Does SCAN scan the entire table for a key attribute?

Answer 1

Will SCAN check the entire table for a key attribute?

Yes, see Querying and Scanning at Amazon DynamoDB :

Scan

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AttributesToGet

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Answer 2

batchGetItem ?