Why Am I Getting MySQL Error Code #1089: Incorrect Prefix Key?

MySQL Error Code #1089: Incorrect Prefix Key

When encountering the enigmatic error code #1089 from MySQL, one may be perplexed as to its significance. This error arises when an inappropriate prefix key is defined, particularly when attempting to use a prefix on a non-string data type or when exceeding the defined length limit for the key part.

In your specific case, the problematic portion of the query appears to be:

PRIMARY KEY (`movie_id`(3))

By specifying (3) alongside movie_id in the primary key definition, you are inadvertently setting up a sub part key on the first 3 bytes of the movie_id column. This approach is only feasible for string data types, not integers like movie_id.

To resolve this issue and eliminate the error, you should modify the primary key definition as follows:

PRIMARY KEY (`movie_id`)

By omitting the (3) suffix, MySQL will create a primary key on the entire movie_id field without any length restrictions. This is the appropriate approach for an integer data type like movie_id.

The above is the detailed content of Why Am I Getting MySQL Error Code #1089: Incorrect Prefix Key?. For more information, please follow other related articles on the PHP Chinese website!