-631 FOREIGN KEY `name` IS TOO LONG OR HAS TOO MANY COLUMNS

Explanation
 This code is used to report that the sum of the
length attributes of the columns identified in the indicated FOREIGN
KEY clause is greater than 255 bytes or the number of columns identified
is greater than 64. The 'name' is the constraint-name specified in
the FOREIGN KEY clause or, if a constraint-name was not specified,
the first column-name specified in the clause.

System action
 The statement cannot be processed.

Programmer response
  The table definition must be modified
to conform to the system-imposed limit of the sum of the length attributes
of the columns identified in the PRIMARY KEY clause.

SQLSTATE
 54008

-631 FOREIGN KEY name IS TOO LONG OR HAS TOO MANY COLUMNS

Explanation

System action

Programmer response

SQLSTATE

-631 FOREIGN KEY `name` IS TOO LONG OR HAS TOO MANY COLUMNS