I am writing to bring to your attention a critical issue we have encountered with our MongoDB aggregation queries. This discrepancy is causing significant concerns with the accuracy of our data reports.

Issue Description:

• Scenario: When applying $match and $project stages in the aggregation pipeline.
• Observation: The preview count before executing the query (side view result) shows a different value compared to the actual output after running the query.
• Example:
  • The side view result shows a count of 1000.
  • After executing the query, the final count is 1230.
• Specifics: I used the following query within the aggregation stages:

javascriptCopy code
{{{ $match:

{ channel: "ATM", responseCode: "00" }

}}}The preview (side view result) shows a count of 2001. However, after clicking the run option, the result shows a count of 2032.

This discrepancy is misleading and affects the accuracy of our reports and data retrieval processes.

Impact:

• Incorrect Data Retrieval: The inconsistent results have led to incorrect data being reflected in our reports.
• Misleading Previews: The differing counts between preview and final execution are causing confusion and mistrust in the data.

I have raised this query previously, but it was closed without resolving the issue or providing a satisfactory explanation. It is crucial for us to understand why the preview and final execution counts are different and to ensure consistent and accurate data retrieval.

Request:

• Investigation: Please investigate this inconsistency urgently.
• Explanation: Provide a detailed explanation as to why the counts differ.
• Resolution: Offer a permanent solution to ensure accurate data retrieval in both preview and execution stages.
• Reopen the Issue: I request the previously closed query be reopened and addressed comprehensively.

Your prompt attention to this matter is highly appreciated, as it impacts our day-to-day operations and overall data integrity.

Thank you for your understanding and swift action.