[Solved] You created this trigger:CREATE TRIGGER trg_instead_of_update INSTEAD OF UPDATE ON v_emp FOR EACH ROW EXECUTE FUNCTION trg_v_emp_update();But when updating the view, you get: ERROR:... | PostgreSQL

PostgreSQL - Triggers in PostgreSQL

You created this trigger:

CREATE TRIGGER trg_instead_of_update INSTEAD OF UPDATE ON v_emp FOR EACH ROW EXECUTE FUNCTION trg_v_emp_update();

But when updating the view, you get: ERROR: function trg_v_emp_update() does not exist
What is the likely cause?

AThe trigger function was not created or has a different name/signature.

BINSTEAD OF triggers cannot be created on views.

CThe trigger syntax is invalid; INSTEAD OF must come after ON clause.

DThe view v_emp does not support updates.

Step-by-Step Solution

Solution:

Step 1: Understand the error message
The error says the function trg_v_emp_update() does not exist, meaning it was not created or named differently.
Step 2: Check other options
INSTEAD OF triggers are valid on views, syntax is correct, and view update support depends on triggers.
Final Answer:
The trigger function was not created or has a different name/signature. -> Option A
Quick Check:
Missing trigger function causes this error = The trigger function was not created or has a different name/signature. [OK]

Quick Trick: Ensure trigger function exists before creating trigger [OK]

Common Mistakes:

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You created this trigger: