Which statement best describes what happens internally when a PostgreSQL function is called with VARIADIC parameters?

hard📝 Conceptual Q10 of 15

PostgreSQL - Advanced PL/pgSQL

AEach VARIADIC argument is passed as a separate scalar parameter

BVARIADIC parameters are ignored if no arguments are passed

CVARIADIC parameters are expanded into multiple function calls internally

DPostgreSQL collects all VARIADIC arguments into a single array before passing to the function

Step-by-Step Solution

Solution:

Step 1: Understand VARIADIC internal behavior
PostgreSQL collects all arguments passed to a VARIADIC parameter into a single array before calling the function.
Step 2: Evaluate other options
Options A, C, and D describe incorrect behaviors: separate scalars, multiple calls, or ignoring parameters.
Final Answer:
PostgreSQL collects all VARIADIC arguments into a single array before passing to the function -> Option D
Quick Check:
VARIADIC args combined into array internally [OK]

Quick Trick: VARIADIC args become one array internally [OK]

Common Mistakes:

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