How to Handle UPDATE Queries with OUTPUT Clause When Triggers Exist?

Using Output clauses to update

When trying to execute the UPDATE query containing Output clauses, errors may occur 334: "If the statement contains output clauses without Into clauses, the target table cannot have any enabled triggers." This error, especially for particularly When a trigger appears on the target table.

Solution: Use the intermediate query

In order to solve this problem, please modify the query to retrieve the values ​​before the update:

<code class="language-sql">SELECT BatchFileXml, ResponseFileXml, ProcessedDate
FROM BatchReports
WHERE BatchReports.BatchReportGUID = @someGuid

UPDATE BatchReports
SET IsProcessed = 1
WHERE BatchReports.BatchReportGUID = @someGuid</code>

This method avoids the use of Output clauses, thereby reducing compatibility issues caused by trigger.

Avoid using Output clauses: harmful effects

The combination of OUTPUT clauses and triggers may cause incorrect data retrieval. Specifically, the Output clauses are retrieved according to the status retrieval value at the time of modification, rather than the retrieval value after the update is completed. This may cause the data in the output results to be incorrect or expired.

The method of change and its defects

Trying the intermediate Table variable to avoid this problem has also been proven to be futile. The timestamp is not allowed to insert the table variable, even if BINARY (8) is used to indicate the timestamp. Since the retrieval value before the update is completed, the return value is incorrect.

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