Create function in postgresql

create [or replace] function function_name(param_list)
   returns return_type 
   language plpgsql
as $$
declare 
-- variable declaration
begin
 -- logic
end;
$$

Source: postgresqltutorial.com

Create function postgresql

CREATE OR REPLACE FUNCTION auditlogfunc() RETURNS TRIGGER AS $example_table$
   BEGIN
      INSERT INTO AUDIT(EMP_ID, ENTRY_DATE) VALUES (new.ID, current_timestamp);
      RETURN NEW;
   END;
$example_table$ LANGUAGE plpgsql;

Source: tutorialspoint.com

Plpgsql create function

postgres=# Create or replace function fun1(n int) returns int 

as

$$

Begin

Insert into test values (n,'2019-11-26');

Return 1;

End;

$$

Language 'plpgsql';

CREATE FUNCTION

postgres=#

Source: enterprisedb.com

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