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43355 (1) [Avatar] Offline
#1
Believe the text in 13.6.2, querying items by key and filter is missing the 'begins_with' for one of the operations the condition the key must match. See: https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_Query.html and scroll down to 'KeyConditionExpression'.

This was the closest I could come to a wild card search.
Andreas Wittig (74) [Avatar] Offline
#2
Thanks a lot for your feedback. Absolutely,
begins_with
is another valid comparison for sort keys. I will fix that in our book.
Michael Wittig (103) [Avatar] Offline
#3
I finally fixed the missing option today. Will be included the final version of the 2nd edition.