[Solved] Consider this AFTER INSERT trigger on table 'orders':CREATE TRIGGER trg_after_insert AFTER INSERT ON orders FOR EACH ROW EXECUTE FUNCTION notify_insert();If a new row is inserted, what happens first? | PostgreSQL

PostgreSQL - Triggers in PostgreSQL

Consider this AFTER INSERT trigger on table 'orders':

CREATE TRIGGER trg_after_insert AFTER INSERT ON orders FOR EACH ROW EXECUTE FUNCTION notify_insert();

If a new row is inserted, what happens first?

AThe notify_insert() function runs after the row is inserted.

BThe notify_insert() function runs before the row is inserted.

CThe trigger prevents the row from being inserted.

DThe trigger runs only if the insert fails.

Step-by-Step Solution

Solution:

Step 1: Understand AFTER INSERT trigger timing
AFTER INSERT triggers run after the row is successfully inserted into the table.
Step 2: Confirm trigger behavior
The function notify_insert() executes only after the insert completes, not before or on failure.
Final Answer:
The notify_insert() function runs after the row is inserted. -> Option A
Quick Check:
AFTER INSERT trigger = function runs post-insert [OK]

Quick Trick: AFTER INSERT triggers run after data insertion completes [OK]

Common Mistakes:

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Consider this AFTER INSERT trigger on table 'orders':