Commit b8ad9d14 authored by unknown's avatar unknown
Browse files

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

HA_KEY_SCAN_NOT_ROR index flag) as NDB index scans are not guaranteed to be ROR 
scans.
parent ec5df5f2

sql/ha_ndbcluster.cc

+2 −1
Original line number Diff line number Diff line
@@ -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)

sql/handler.h

+7 −0
Original line number Diff line number Diff line
@@ -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

sql/opt_range.cc

+2 −0
Original line number Diff line number Diff line
@@ -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);

}