database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

Merge maria-5.3-mwl248 -> 5.5 = maria-5.5-mwl248.

Browse Source
This commit is contained in:
Igor Babaev
2012-03-19 01:35:32 -07:00
parent 51c77ec5d4 7b845f551b
commit ff3d16fba8
53 changed files with 3608 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
sql/structs.h
View File

@ -115,6 +115,31 @@ typedef struct st_key {
For temporary heap tables this member is NULL.
*/
ulong *rec_per_key;
/* Statistical data on an index prefixes */
class Index_statistics
{
public:
/*
The k-th element of this array contains the ratio N/D,
where N is the number of index entries without nulls
in the first k components, and D is the number of distinct
k-component prefixes among them
*/
double *avg_frequency;
};
/*
This structure is used for statistical data on the index
that has been read from the statistical table index_stat
*/
Index_statistics read_stat;
/*
This structure is used for statistical data on the index that
is collected by the function collect_statistics_for_table
*/
Index_statistics write_stat;
union {
int bdb_return_if_eq;
} handler;