the size of the fk_cols_array, fk_names_array, ref_pk_cols_array and ref_pk_names_array arrays
the #GdaMetaDbObject which is referenced by the foreign key
the columns' indexes in meta_table which participate in the constraint (WARNING: columns numbering
here start at 1)
the columns' names in meta_table which participate in the constraint
the #GdaMetaDbObject for which this structure represents a foreign key
the columns' indexes in depend_on which participate in the constraint (WARNING: columns numbering
here start at 1)
the columns' names in depend_on which participate in the constraint
This structure represents a foreign key constraint, its contents must not be modified.