Update generated code (#1527)

update generated code

Author: async-aws-bot

src/DynamoDbClient.php

@@ -727,22 +727,34 @@ public function query($input): QueryOutput
      * The `Scan` operation returns one or more items and item attributes by accessing every item in a table or a secondary
      * index. To have DynamoDB return fewer items, you can provide a `FilterExpression` operation.
      *
-     * If the total number of scanned items exceeds the maximum dataset size limit of 1 MB, the scan stops and results are
-     * returned to the user as a `LastEvaluatedKey` value to continue the scan in a subsequent operation. The results also
-     * include the number of items exceeding the limit. A scan can result in no table data meeting the filter criteria.
+     * If the total size of scanned items exceeds the maximum dataset size limit of 1 MB, the scan completes and results are
+     * returned to the user. The `LastEvaluatedKey` value is also returned and the requestor can use the `LastEvaluatedKey`
+     * to continue the scan in a subsequent operation. Each scan response also includes number of items that were scanned
+     * (ScannedCount) as part of the request. If using a `FilterExpression`, a scan result can result in no items meeting
+     * the criteria and the `Count` will result in zero. If you did not use a `FilterExpression` in the scan request, then
+     * `Count` is the same as `ScannedCount`.
      *
-     * A single `Scan` operation reads up to the maximum number of items set (if using the `Limit` parameter) or a maximum
-     * of 1 MB of data and then apply any filtering to the results using `FilterExpression`. If `LastEvaluatedKey` is
-     * present in the response, you need to paginate the result set. For more information, see Paginating the Results [^1]
-     * in the *Amazon DynamoDB Developer Guide*.
+     * > `Count` and `ScannedCount` only return the count of items specific to a single scan request and, unless the table
+     * > is less than 1MB, do not represent the total number of items in the table.
+     *
+     * A single `Scan` operation first reads up to the maximum number of items set (if using the `Limit` parameter) or a
+     * maximum of 1 MB of data and then applies any filtering to the results if a `FilterExpression` is provided. If
+     * `LastEvaluatedKey` is present in the response, pagination is required to complete the full table scan. For more
+     * information, see Paginating the Results [^1] in the *Amazon DynamoDB Developer Guide*.
      *
      * `Scan` operations proceed sequentially; however, for faster performance on a large table or secondary index,
      * applications can request a parallel `Scan` operation by providing the `Segment` and `TotalSegments` parameters. For
      * more information, see Parallel Scan [^2] in the *Amazon DynamoDB Developer Guide*.
      *
-     * `Scan` uses eventually consistent reads when accessing the data in a table; therefore, the result set might not
-     * include the changes to data in the table immediately before the operation began. If you need a consistent copy of the
-     * data, as of the time that the `Scan` begins, you can set the `ConsistentRead` parameter to `true`.
+     * By default, a `Scan` uses eventually consistent reads when accessing the items in a table. Therefore, the results
+     * from an eventually consistent `Scan` may not include the latest item changes at the time the scan iterates through
+     * each item in the table. If you require a strongly consistent read of each item as the scan iterates through the items
+     * in the table, you can set the `ConsistentRead` parameter to true. Strong consistency only relates to the consistency
+     * of the read at the item level.
+     *
+     * > DynamoDB does not provide snapshot isolation for a scan operation when the `ConsistentRead` parameter is set to
+     * > true. Thus, a DynamoDB scan operation does not guarantee that all reads in a scan see a consistent snapshot of the
+     * > table when the scan operation was requested.
      *
      * [^1]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Scan.html#Scan.Pagination
      * [^2]: https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Scan.html#Scan.ParallelScan

src/ValueObject/Update.php

@@ -55,7 +55,7 @@ final class Update
 
     /**
      * Use `ReturnValuesOnConditionCheckFailure` to get the item attributes if the `Update` condition fails. For
-     * `ReturnValuesOnConditionCheckFailure`, the valid values are: NONE, ALL_OLD, UPDATED_OLD, ALL_NEW, UPDATED_NEW.
+     * `ReturnValuesOnConditionCheckFailure`, the valid values are: NONE and ALL_OLD.
      *
      * @var ReturnValuesOnConditionCheckFailure::*|null
      */