[Solved] Identify the error in the following function definition: CREATE FUNCTION multiply_by_two(x integer) RETURNS integer AS $ BEGIN RETURN x * 2 END; $ LANGUAGE plpgsql; | PostgreSQL

PostgreSQL - PL/pgSQL Fundamentals

Identify the error in the following function definition:

CREATE FUNCTION multiply_by_two(x integer) RETURNS integer AS $$ BEGIN RETURN x * 2 END; $$ LANGUAGE plpgsql;

AMissing RETURNS clause

BIncorrect function name syntax

CMissing semicolon after RETURN statement

DLANGUAGE plpgsql is not allowed

Step-by-Step Solution

Solution:

Step 1: Review function body syntax
In PL/pgSQL, each statement inside the function body must end with a semicolon.
Step 2: Locate missing semicolon
The RETURN statement lacks a semicolon after x * 2, causing a syntax error.
Final Answer:
Missing semicolon after RETURN statement -> Option C
Quick Check:
Statements inside function need semicolons [OK]

Quick Trick: Check for semicolons after each statement inside function [OK]

Common Mistakes:

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Identify the error in the following function definition: