database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-01 03:47:19 +03:00
Code Activity

BUG#13081: Disable ROR-index_merge for NDB tables (by adding a

Browse Source 
HA_KEY_SCAN_NOT_ROR index flag) as NDB index scans are not guaranteed to be ROR 
scans.
This commit is contained in:
unknown
2005-09-30 14:20:15 +04:00
parent ec5df5f269
commit b8ad9d1461
3 changed files with 11 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
sql/ha_ndbcluster.cc
View File

@ -1209,7 +1209,8 @@ inline ulong ha_ndbcluster::index_flags(uint idx_no, uint part,
DBUG_ENTER("ha_ndbcluster::index_flags");
DBUG_PRINT("info", ("idx_no: %d", idx_no));
DBUG_ASSERT(get_index_type_from_table(idx_no) < index_flags_size);
DBUG_RETURN(index_type_flags[get_index_type_from_table(idx_no)]);
DBUG_RETURN(index_type_flags[get_index_type_from_table(idx_no)] |
HA_KEY_SCAN_NOT_ROR);
}
static void shrink_varchar(Field* field, const byte* & ptr, char* buf)

7
sql/handler.h
View File

@ -98,6 +98,13 @@
#define HA_ONLY_WHOLE_INDEX 16 /* Can't use part key searches */
#define HA_KEYREAD_ONLY 64 /* Support HA_EXTRA_KEYREAD */
/*
Index scan will not return records in rowid order. Not guaranteed to be
set for unordered (e.g. HASH) indexes.
*/
#define HA_KEY_SCAN_NOT_ROR 128
/* operations for disable/enable indexes */
#define HA_KEY_SWITCH_NONUNIQ 0
#define HA_KEY_SWITCH_ALL 1

2
sql/opt_range.cc
View File

@ -5117,6 +5117,8 @@ check_quick_select(PARAM *param,uint idx,SEL_ARG *tree)
if (cpk_scan)
param->is_ror_scan= TRUE;
}
if (param->table->file->index_flags(key, 0, TRUE) & HA_KEY_SCAN_NOT_ROR)
param->is_ror_scan= FALSE;
DBUG_PRINT("exit", ("Records: %lu", (ulong) records));
DBUG_RETURN(records);
}