How to fix ERROR 1504: Number of partitions = 0 not allowed in MySQL

Check your CREATE TABLE or ALTER TABLE statement. The PARTITIONS keyword must be followed by a positive integer value (1 or greater).

Invalid (causes error 1504):

CREATE TABLE my_table (
  id INT PRIMARY KEY,
  data VARCHAR(255)
) PARTITION BY HASH(id) PARTITIONS 0;

Valid:

CREATE TABLE my_table (
  id INT PRIMARY KEY,
  data VARCHAR(255)
) PARTITION BY HASH(id) PARTITIONS 4;

Change the PARTITIONS value to a positive integer. For most use cases, a good starting point is 4-8 partitions depending on your data volume and query patterns.

CREATE TABLE my_table (
  id INT PRIMARY KEY,
  data VARCHAR(255),
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) PARTITION BY HASH(id) PARTITIONS 4;

Run the updated CREATE TABLE or ALTER TABLE command:

CREATE TABLE my_table (
  id INT PRIMARY KEY,
  data VARCHAR(255)
) PARTITION BY HASH(id) PARTITIONS 4;

If successful, you should see no error and the table will be created with the specified number of partitions.

If you're using MySQL Workbench or another graphical tool, ensure that when you enable partitioning, the partition count field defaults to or is manually set to at least 1 before applying changes. Check your tool's settings to see if there's a minimum partition count validation you can enable.