database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-27 18:02:13 +03:00
Code Activity

merge.

Browse Source 
checkpoint.
does not compile.
This commit is contained in:
Sergei Golubchik
2010-11-25 18:17:28 +01:00
parent 2ab57de38d 6e5bcca793
commit 65ca700def
2732 changed files with 867504 additions and 20901 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
sql/sql_const.h
View File

@ -30,7 +30,7 @@
#define MAX_FIELD_NAME 34 /* Max colum name length +2 */
#define MAX_SYS_VAR_LENGTH 32
#define MAX_KEY MAX_INDEXES /* Max used keys */
#define MAX_REF_PARTS 16 /* Max parts used as ref */
#define MAX_REF_PARTS 32 /* Max parts used as ref */
#define MAX_KEY_LENGTH 3072 /* max possible key */
#if SIZEOF_OFF_T > 4
#define MAX_REFLENGTH 8 /* Max length for record ref */
@ -176,11 +176,11 @@
The cost of average seek
DISK_SEEK_BASE_COST + DISK_SEEK_PROP_COST*BLOCKS_IN_AVG_SEEK =1.0.
*/
#define DISK_SEEK_BASE_COST ((double)0.5)
#define DISK_SEEK_BASE_COST ((double)0.9)
#define BLOCKS_IN_AVG_SEEK 128
#define DISK_SEEK_PROP_COST ((double)0.5/BLOCKS_IN_AVG_SEEK)
#define DISK_SEEK_PROP_COST ((double)0.1/BLOCKS_IN_AVG_SEEK)
/**
@ -190,6 +190,12 @@
*/
#define MATCHING_ROWS_IN_OTHER_TABLE 10
/*
Subquery materialization-related constants
*/
#define HEAP_TEMPTABLE_LOOKUP_COST 0.05
#define DISK_TEMPTABLE_LOOKUP_COST 1.0
#define MY_CHARSET_BIN_MB_MAXLEN 1
/** Don't pack string keys shorter than this (if PACK_KEYS=1 isn't used). */