[Solved] Why does PostgreSQL allow functions with OUT parameters to omit an explicit RETURN statement? — Ans: Because OUT parameters act as implicit return values collected into a record. | PostgreSQL

PostgreSQL - Advanced PL/pgSQL

Why does PostgreSQL allow functions with OUT parameters to omit an explicit RETURN statement?

ABecause the function automatically commits changes without RETURN.

BBecause OUT parameters act as implicit return values collected into a record.

CBecause RETURN is only needed for scalar return types.

DBecause OUT parameters are only for input, not output.

Step-by-Step Solution

Solution:

Step 1: Understand OUT parameter behavior
OUT parameters are assigned inside the function and form the return record automatically.
Step 2: Explain omission of RETURN
Since OUT parameters define the output, explicit RETURN is not required to send results back.
Final Answer:
Because OUT parameters act as implicit return values collected into a record. -> Option B
Quick Check:
OUT parameters = implicit return record [OK]

Quick Trick: OUT parameters implicitly return values without RETURN [OK]

Common Mistakes:

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Why does PostgreSQL allow functions with OUT parameters to omit an explicit RETURN statement?