[Solved] What will happen when running this DO block?DO $ DECLARE x INTEGER := 10; BEGIN x := x + 5; RAISE NOTICE 'Value: %', x; END $; | PostgreSQL

PostgreSQL - PL/pgSQL Fundamentals

What will happen when running this DO block?

DO $$
DECLARE
  x INTEGER := 10;
BEGIN
  x := x + 5;
  RAISE NOTICE 'Value: %', x;
END
$$;

AERROR: variable x not declared

BNOTICE: Value: 15

CNOTICE: Value: 10

DNo output, variable changes silently

Step-by-Step Solution

Solution:

Step 1: Check variable declaration and initialization
Variable x is declared as INTEGER and initialized to 10.
Step 2: Analyze the increment and RAISE NOTICE
x is increased by 5, so x becomes 15, then printed.
Final Answer:
NOTICE: Value: 15 -> Option B
Quick Check:
Variable update and notice = 15 [OK]

Quick Trick: Declare variables in DECLARE block before BEGIN [OK]

Common Mistakes:

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What will happen when running this DO block?