[Solved] Why is it important for a PostgreSQL audit trigger function to return NEW or OLD appropriately? — Ans: Because returning the wrong value can prevent the original operation from... | PostgreSQL

PostgreSQL - Triggers in PostgreSQL

Why is it important for a PostgreSQL audit trigger function to return NEW or OLD appropriately?

ABecause it controls the audit log table structure

BBecause it speeds up query execution

CBecause it changes user permissions automatically

DBecause returning the wrong value can prevent the original operation from completing

Step-by-Step Solution

Solution:

Step 1: Understand trigger function return values
Row-level triggers must return NEW for INSERT/UPDATE to proceed or OLD for DELETE; wrong return can abort operation.
Step 2: Recognize impact of incorrect return
Returning incorrect value can block or alter the original data change, causing errors or data loss.
Final Answer:
Because returning the wrong value can prevent the original operation from completing -> Option D
Quick Check:
Correct return value ensures operation success [OK]

Quick Trick: Return NEW or OLD correctly to avoid blocking operations [OK]

Common Mistakes:

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Why is it important for a PostgreSQL audit trigger function to return NEW or OLD appropriately?