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Editorial Team
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Asked: 2026-06-01T21:04:13+00:00

CREATE OR REPLACE FUNCTION addUploader(INTEGER, TEXT, TEXT) RETURNS TEXT AS $$ DECLARE u_id ALIAS

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CREATE OR REPLACE FUNCTION addUploader(INTEGER, TEXT, TEXT) RETURNS TEXT AS $$

DECLARE

  u_id ALIAS FOR $1 ;
  username ALIAS FOR $2;
  email ALIAS FOR $3; 

BEGIN 

  IF email NOT LIKE '^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+$' THEN

    RAISE EXCEPTION 'Wrong E-mail format %', email
        USING HINT = 'Please check your E-mail format.';

  END IF ; 

  INSERT INTO uploader VALUES(u_id,username,email);

  IF NOT FOUND THEN
    RETURN 'Error';
  END IF;
  RETURN 'Successfully added' ; 

EXCEPTION WHEN unique_violation THEN
  RAISE NOTICE 'This ID already exists. Specify another one.' ; 
  RETURN 'Error' ; 

END ; $$ LANGUAGE 'plpgsql' ; 

SELECT addUploader(25,'test','steven@gmail.com');

This regex does not accept a correct email address. It should accept steven@gmail.com.It is also rejecting any other string.

stevengmailcom – rejected

Everything is being rejected.

What am i doing wrong?

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1 Answer

  1. Editorial Team

    You don’t use LIKE with regexes in PostgreSQL, you use the ~, ~*, !~, and !~* operators:

    ~
    Matches regular expression, case sensitive

    ~*
    Matches regular expression, case insensitive

    !~
    Does not match regular expression, case sensitive

    !~*
    Does not match regular expression, case insensitive

    So your test should look more like this:

    IF email !~ '^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+$' THEN

    You also might want to hunt down a better regex for email addresses, “a+b@c.com” is a valid email address but your regex doesn’t like it.

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