Appsync GraphQL query does not return all DynamoDB rows?

Question

I have a DynamoDB table and I noticed I was getting inconsistent results (in my web app) as I added more data to the table.
I added 200 test rows to the table. The data includes a date.

I entered 4 rows for a specific date. I can use the DynamoDB console to filter these items and see the 4 records that match the date as expected.

When I issue a GraphQL query in the Appsync console filtered on the same date, I only get 2 items returned.

Hopefully, these images show both the DynamoDB and the Appsync consoles

![DynamoDB](/media/postImages/original/IM4PG2pA33QbaagDGkOX9TLA)

![Appsync Console](/media/postImages/original/IMbK9N2w0vR1aD3zj5GIMijQ)

Any ideas?

Thanks
Kevin

Answer

I can see that there are default limits applied to the query as it is performing a scan.

Details are provided here: https://aws.amazon.com/premiumsupport/knowledge-center/appsync-wrong-query-item-number-dynamodb/

I updated the Appsync console query to include an updated limit and this now works fine.

query MyQuery {
  listActivities(limit: 1000, filter: {date: {eq: "2023-02-25T13:45+00:00"}}) {
    items {
      date
      owner
    }
  }
}

Appsync GraphQL query does not return all DynamoDB rows?

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