| InnoDB Plugin
    1.0
    | 
#include <row0ext.h>
| Data Fields | |
| ulint | n_ext | 
| const ulint * | ext | 
| byte * | buf | 
| ulint | max_len | 
| ulint | len [1] | 
Prefixes of externally stored columns
| byte* row_ext_t::buf | 
backing store of the column prefix cache
| const ulint* row_ext_t::ext | 
col_no's of externally stored columns
| ulint row_ext_t::len[1] | 
prefix lengths; 0 if not cached
| ulint row_ext_t::max_len | 
maximum prefix length, it could be REC_ANTELOPE_MAX_INDEX_COL_LEN or REC_VERSION_56_MAX_INDEX_COL_LEN depending on row format
| ulint row_ext_t::n_ext | 
number of externally stored columns
 1.8.1.2
 1.8.1.2