How to fix ERROR 1407: Bad SQLSTATE in MySQL

MySQLINTERMEDIATEHIGHUpdated Dec 25, 2025· 183 views

ERROR 1407 occurs when you provide an invalid SQLSTATE value in a SIGNAL statement within a stored procedure or condition handler. SQLSTATE values must be exactly 5 characters and cannot start with "00" (which indicates success). Use "45000" for user-defined exceptions.

Quick fix

Fixes ERROR 1407: Bad SQLSTATE

-- TOO SHORT (3 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "123";

-- TOO LONG (6 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "123456";

-- CORRECT (5 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "45000";
  1. Verify SQLSTATE format is exactly 5 characters
  2. Ensure SQLSTATE does not start with "00"
  3. Use "45000" for custom error conditions
  4. Fix inline SIGNAL statements with valid SQLSTATE
mysql — error
-- TOO SHORT (3 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "123";
-- TOO LONG (6 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "123456";
-- CORRECT (5 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "45000";
ERROR 1407: Bad SQLSTATE

What this error means

ERROR 1407 (SQLSTATE 42000) is a MySQL syntax error that occurs when you attempt to signal an error using an invalid SQLSTATE value in a stored procedure, trigger, or condition handler. SQLSTATE is a five-character code defined by the SQL standard that indicates the outcome of SQL statements. The first two characters represent the error class (where "00" indicates success), and the last three represent the subclass. When MySQL encounters an improperly formatted or semantically invalid SQLSTATE value in a SIGNAL or DECLARE CONDITION statement, it raises this error to prevent the creation of invalid error handlers. This error is specific to stored procedures and triggers because these features support custom error handling through the SIGNAL and RESIGNAL statements. The error typically manifests when attempting to define a condition or signal an exception with a malformed SQLSTATE value.

Typical symptoms

  • MySQL error appears when creating or executing a stored procedure
  • Error message shows: "ERROR 1407 (42000): Bad SQLSTATE: 'XXXXX'"
  • Stored procedure fails to create even though the syntax appears correct
  • SIGNAL or DECLARE CONDITION statements are rejected during procedure compilation
  • Trigger creation fails when attempting to signal custom errors

Common causes

  1. SQLSTATE value is not exactly 5 characters long
  2. SQLSTATE value starts with "00" (reserved for success/no error)
  3. SQLSTATE value contains invalid characters (must be alphanumeric)
  4. Using an undeclared condition name in SIGNAL that was not defined with SQLSTATE
  5. Typo in the SQLSTATE string literal in SIGNAL or DECLARE CONDITION

How to fix "ERROR 1407: Bad SQLSTATE"

1Verify SQLSTATE format is exactly 5 characters

Check that your SQLSTATE value is exactly 5 characters long. Invalid examples:

sql
-- TOO SHORT (3 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "123";

-- TOO LONG (6 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "123456";

-- CORRECT (5 chars)
DECLARE my_condition CONDITION FOR SQLSTATE "45000";

Each SQLSTATE value must have exactly 5 characters.

2Ensure SQLSTATE does not start with "00"

SQLSTATE values beginning with "00" are reserved by SQL standard to indicate success, and cannot be used in error signaling. These will cause ERROR 1407:

sql
-- WRONG: "00" indicates success
DECLARE my_condition CONDITION FOR SQLSTATE "00123";

-- CORRECT: Use "45000" for user-defined exceptions
DECLARE my_condition CONDITION FOR SQLSTATE "45000";

Valid SQLSTATE prefixes for error conditions:
- "01" = warnings
- "02" = not found
- "45" = user-defined exceptions
- "HY" = general error class

3Use "45000" for custom error conditions

The recommended SQLSTATE value for user-defined exceptions in stored procedures is "45000". This is the generic unhandled user-defined exception code:

sql
DELIMITER //

CREATE PROCEDURE validate_age(IN p_age INT)
BEGIN
  DECLARE invalid_age CONDITION FOR SQLSTATE "45000";
  
  IF p_age < 0 THEN
    SIGNAL invalid_age SET MESSAGE_TEXT = "Age cannot be negative";
  END IF;
END //

DELIMITER ;

This procedure now properly defines a condition with valid SQLSTATE "45000" and signals it when validation fails.

4Fix inline SIGNAL statements with valid SQLSTATE

If you're using SIGNAL directly without declaring a condition, ensure the SQLSTATE is valid:

sql
-- WRONG: Will cause ERROR 1407
SIGNAL SQLSTATE "00000" SET MESSAGE_TEXT = "Error";

-- CORRECT: Use valid SQLSTATE
SIGNAL SQLSTATE "45000" SET MESSAGE_TEXT = "An error occurred";

In triggers:

sql
CREATE TRIGGER validate_insert BEFORE INSERT ON users
FOR EACH ROW
BEGIN
  IF NEW.email IS NULL THEN
    SIGNAL SQLSTATE "45000" SET MESSAGE_TEXT = "Email cannot be null";
  END IF;
END;
5Verify condition names are properly declared with SQLSTATE

If using condition names (rather than inline SQLSTATE), ensure each condition is declared with a valid SQLSTATE:

sql
DELIMITER //

CREATE PROCEDURE process_order(IN p_order_id INT)
BEGIN
  -- Declare conditions properly
  DECLARE invalid_order CONDITION FOR SQLSTATE "45001";
  DECLARE processing_error CONDITION FOR SQLSTATE "45002";
  
  -- Use them in handlers
  DECLARE EXIT HANDLER FOR 1451
  BEGIN
    SIGNAL invalid_order SET MESSAGE_TEXT = "Cannot process order with related records";
  END;
  
  -- Procedure logic here
END //

DELIMITER ;

Each DECLARE CONDITION must have a proper 5-character SQLSTATE that does not start with "00".

Advanced notes

SQLSTATE values follow the SQL standard (ANSI SQL and ODBC) structure. The first two characters represent the class and the last three the subclass. Key classes include: "01" for warnings, "02" for NOT FOUND, "07" for dynamic SQL errors, "42" for syntax errors (like this one). When MySQL cannot map a specific error number to a SQLSTATE, it uses "HY000" (general error). The "45" class is reserved for user-defined exceptions and is the recommended choice for custom SIGNAL statements in stored procedures. Some MySQL versions may have slightly different SQLSTATE handling, so always verify with your specific MySQL version documentation.

Frequently asked questions

What does "ERROR 1407: Bad SQLSTATE" mean?
ERROR 1407 (SQLSTATE 42000) is a MySQL syntax error that occurs when you attempt to signal an error using an invalid SQLSTATE value in a stored procedure, trigger, or condition handler. SQLSTATE is a five-character code defined by the SQL standard that indicates the outcome of SQL statements. The first two characters represent the error class (where "00" indicates success), and the last three represent the subclass.
How do I fix "ERROR 1407: Bad SQLSTATE"?
ERROR 1407 occurs when you provide an invalid SQLSTATE value in a SIGNAL statement within a stored procedure or condition handler. SQLSTATE values must be exactly 5 characters and cannot start with "00" (which indicates success). Use "45000" for user-defined exceptions.
What causes "ERROR 1407: Bad SQLSTATE"?
SQLSTATE value is not exactly 5 characters long SQLSTATE value starts with "00" (reserved for success/no error) SQLSTATE value contains invalid characters (must be alphanumeric)
Is the "ERROR 1407: Bad SQLSTATE" error serious?
Yes. This is a high-severity error that usually blocks work until it is fixed, but the steps above resolve it.

Official resources & further reading