diff options
Diffstat (limited to 'innobase/include/dict0mem.h')
| -rw-r--r-- | innobase/include/dict0mem.h | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/innobase/include/dict0mem.h b/innobase/include/dict0mem.h index 0798541cfe0..03dc913a7c9 100644 --- a/innobase/include/dict0mem.h +++ b/innobase/include/dict0mem.h @@ -111,10 +111,13 @@ by the column name may be released only after publishing the index. */ void dict_mem_index_add_field( /*=====================*/ - dict_index_t* index, /* in: index */ - char* name, /* in: column name */ - ulint order); /* in: order criterion; 0 means an ascending - order */ + dict_index_t* index, /* in: index */ + char* name, /* in: column name */ + ulint order, /* in: order criterion; 0 means an + ascending order */ + ulint prefix_len); /* in: 0 or the column prefix length + in a MySQL index like + INDEX (textcol(25)) */ /************************************************************************** Frees an index memory object. */ @@ -158,12 +161,18 @@ struct dict_col_struct{ in some of the functions below */ }; +#define DICT_MAX_COL_PREFIX_LEN 512 + /* Data structure for a field in an index */ struct dict_field_struct{ - dict_col_t* col; /* pointer to the table column */ - char* name; /* name of the column */ - ulint order; /* flags for ordering this field: - DICT_DESCEND, ... */ + dict_col_t* col; /* pointer to the table column */ + char* name; /* name of the column */ + ulint order; /* flags for ordering this field: + DICT_DESCEND, ... */ + ulint prefix_len; /* 0 or the length of the column + prefix in a MySQL index of type, e.g., + INDEX (textcol(25)); must be smaller + than DICT_MAX_COL_PREFIX_LEN */ }; /* Data structure for an index tree */ |