Check out example codes for "raise notice in postgresql function". It will help you in understanding the concepts better.

Code Example 1

RAISE INFO 'Hello World !';
RAISE NOTICE '%', variable_name;
RAISE NOTICE 'Current value of parameter (%)', my_var;
RAISE EXCEPTION '% cannot have null salary', EmpName;

Code Example 2

RAISE INFO 'Hello World !';
RAISE NOTICE '%', variable_name;
RAISE NOTICE 'Current value of parameter (%)', my_var;
RAISE EXCEPTION '% cannot have null salary', EmpName;

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