field_offset      642 ext/mysqlnd/mysqlnd_structs.h typedef MYSQLND_FIELD_OFFSET (*func_mysqlnd_res__seek_field)(MYSQLND_RES * const result, const MYSQLND_FIELD_OFFSET field_offset);
field_offset      737 ext/mysqlnd/mysqlnd_structs.h typedef MYSQLND_FIELD_OFFSET	(*func_mysqlnd_res_meta__field_seek)(MYSQLND_RES_METADATA * const meta, const MYSQLND_FIELD_OFFSET field_offset);