📋

Description

Error 1314 indicates that a specific SQL statement or construct, identified by the placeholder, is not permitted within the context of a MariaDB stored procedure, function, or trigger. This typically occurs when attempting to create or alter a stored program that contains operations restricted for security, transactional integrity, or architectural reasons.

💬

Error Message

%s is not allowed in stored procedures

🔍

Known Causes

4 known causes

⚠️

Using LOCK TABLES or UNLOCK TABLES

Statements like LOCK TABLES and UNLOCK TABLES control global table locks and are generally disallowed within stored programs to prevent deadlocks or unexpected behavior.

⚠️

Attempting to use USE database_name

Changing the default database within a stored procedure or function is restricted to maintain a predictable execution context and avoid unintended operations.

⚠️

Executing certain DDL statements

Some Data Definition Language (DDL) statements, especially those affecting temporary tables (e.g., CREATE TEMPORARY TABLE), are restricted inside stored programs due to their session-specific nature.

⚠️

Dynamic SQL with restricted operations

While PREPARE and EXECUTE are allowed for dynamic SQL, if the dynamically executed string itself contains a disallowed statement, this error will be triggered.

🛠️

Solutions

3 solutions available

1. Identify and Remove Disallowed Statements easy

Locate and remove the offending statement from your stored procedure.

1

Examine the error message carefully. It will explicitly state which statement is disallowed (e.g., 'LOAD DATA INFILE', 'CREATE TEMPORARY TABLE').

2

Open your stored procedure definition in a SQL client or editor.

3

Search for the disallowed statement within the procedure's body. For example, if the error is about 'LOAD DATA INFILE', search for that keyword.

4

Remove or comment out the disallowed statement. If the functionality is essential, consider alternative approaches.

DELIMITER //
CREATE PROCEDURE my_procedure() 
BEGIN
  -- SELECT 'This is a valid statement';
  -- LOAD DATA INFILE '/path/to/file.csv' INTO TABLE my_table; -- This line would be removed or commented out
END //
DELIMITER ;

5

Re-create the stored procedure with the corrected definition.

DROP PROCEDURE IF EXISTS my_procedure;
DELIMITER //
CREATE PROCEDURE my_procedure() 
BEGIN
  SELECT 'This is a valid statement';
END //
DELIMITER ;

2. Refactor Procedure Logic to Avoid Disallowed Statements medium

Re-architect the procedure's functionality using allowed SQL constructs.

1

Understand the purpose of the disallowed statement. For example, if it's `CREATE TEMPORARY TABLE`, determine why a temporary table was needed.

2

Explore alternative methods within stored procedures. For instance, instead of `CREATE TEMPORARY TABLE`, you might use a regular table and clean it up afterwards, or use a derived table in your `SELECT` statements.

3

If the disallowed statement involves file operations (like `LOAD DATA INFILE` or `SELECT ... INTO OUTFILE`), consider pre-processing the data outside the procedure or using client-side tools to insert data.

4

Rewrite the stored procedure, replacing the disallowed functionality with equivalent logic using allowed statements. This might involve more complex `SELECT` statements, cursors (if applicable and allowed), or multiple simpler procedures.

DELIMITER //
CREATE PROCEDURE process_data_without_temp_table(IN input_data TEXT)
BEGIN
  -- Assume input_data needs to be processed and results stored
  -- Instead of CREATE TEMPORARY TABLE, use a regular table (if cleanup is managed)
  -- Or construct a result set directly using subqueries/derived tables
  SELECT processed_value FROM (
    SELECT ... -- Your processing logic here
  ) AS temp_result;
END //
DELIMITER ;

5

Test the refactored procedure thoroughly to ensure it produces the correct results and performs efficiently.

3. Execute Disallowed Statements from a Client Application medium

Move the disallowed operation outside the stored procedure to a client application.

1

Identify the statement causing the error (e.g., `LOAD DATA INFILE`, `CREATE TEMPORARY TABLE`).

2

Determine if this statement can be executed safely from a client application (like a Python script with `mysql.connector`, a PHP script, or a command-line client).

3

Modify your application logic to execute the disallowed statement directly, rather than relying on the stored procedure to do it.

import mysql.connector

conn = mysql.connector.connect(
    host='localhost',
    user='your_user',
    password='your_password',
    database='your_database'
)
c = conn.cursor()

# Example: Executing LOAD DATA INFILE from client
c.execute("LOAD DATA INFILE '/path/to/file.csv' INTO TABLE my_table")

# Then call the stored procedure if it needs to process the data further
c.callproc('my_procedure')

conn.commit()
c.close()
conn.close()

4

Ensure the stored procedure is modified to not include the now-externalized statement.

DELIMITER //
CREATE PROCEDURE my_procedure() 
BEGIN
  -- This procedure now assumes the data is already loaded or temporary tables are created externally
  SELECT 'Processing data...';
END //
DELIMITER ;

🔗

Related Errors

5 related errors

MariaDB Error 1314: Disallowed Statements in Stored Procedures