MySQL 9.0.0
Source Code Documentation
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Data structure for a field in an index. More...
#include <dict0mem.h>
Public Member Functions | |
dict_field_t () | |
uint16_t | get_phy_pos () const |
Public Attributes | |
dict_col_t * | col |
pointer to the table column More... | |
id_name_t | name |
name of the column More... | |
unsigned | prefix_len: 12 |
0 or the length of the column prefix in bytes in a MySQL index of type, e.g., INDEX (textcol(25)); must be smaller than DICT_MAX_FIELD_LEN_BY_FORMAT; NOTE that in the UTF-8 charset, MySQL sets this to (mbmaxlen * the prefix len) in UTF-8 chars More... | |
unsigned | fixed_len: 10 |
0 or the fixed length of the column if smaller than DICT_ANTELOPE_MAX_INDEX_COL_LEN More... | |
unsigned | is_ascending: 1 |
0=DESC, 1=ASC More... | |
Data structure for a field in an index.
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inline |
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inline |
dict_col_t* dict_field_t::col |
pointer to the table column
unsigned dict_field_t::fixed_len |
0 or the fixed length of the column if smaller than DICT_ANTELOPE_MAX_INDEX_COL_LEN
unsigned dict_field_t::is_ascending |
0=DESC, 1=ASC
id_name_t dict_field_t::name |
name of the column
unsigned dict_field_t::prefix_len |
0 or the length of the column prefix in bytes in a MySQL index of type, e.g., INDEX (textcol(25)); must be smaller than DICT_MAX_FIELD_LEN_BY_FORMAT; NOTE that in the UTF-8 charset, MySQL sets this to (mbmaxlen * the prefix len) in UTF-8 chars