95NO_ACTION, /*!< Indicates that the deletion or update would create a foreign key constraint violation. */
96RESTRICT, /*!< Indicates that the deletion or update would create a foreign key constraint violation. */
97CASCADE, /*!< Delete any rows referencing the deleted row, or update the value of the referencing column to the new value of the referenced column, respectively. */
98SET_NULL, /*!< Set the referencing column(s) to null. */
99SET_DEFAULT/*!< Set the referencing column(s) to their default values. */