cleanup of ha_myisam::deactivate_non_unique_index() and Co.

myisam/mi_check.c

@@ -3966,10 +3966,11 @@ static my_bool mi_too_big_key_for_sort(MI_KEYDEF *key, ha_rows rows)
 void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows)
 {
   MYISAM_SHARE *share=info->s;
-  uint i;
-  if (!info->state->records)			/* Don't do this if old rows */
-  {
   MI_KEYDEF    *key=share->keyinfo;
+  uint          i;
+
+  DBUG_ASSERT(info->state->records == 0 &&
+              (!rows || rows >= MI_MIN_ROWS_TO_DISABLE_INDEXES));
   for (i=0 ; i < share->base.keys ; i++,key++)
   {
     if (!(key->flag & (HA_NOSAME | HA_SPATIAL | HA_AUTO_KEY)) &&
@@ -3979,7 +3980,6 @@ void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows)
       info->update|= HA_STATE_CHANGED;
     }
   }
-  }
 }
 
 

myisam/mi_write.c

@@ -916,8 +916,8 @@ int mi_init_bulk_insert(MI_INFO *info, ulong cache_size, ha_rows rows)
   DBUG_ENTER("_mi_init_bulk_insert");
   DBUG_PRINT("enter",("cache_size: %lu", cache_size));
 
-  if (info->bulk_insert || (rows && rows < MI_MIN_ROWS_TO_USE_BULK_INSERT))
+  DBUG_ASSERT(!info->bulk_insert &&
-    DBUG_RETURN(0);
+      (!rows || rows >= MI_MIN_ROWS_TO_USE_BULK_INSERT));
 
   for (i=total_keylength=num_keys=0 ; i < share->base.keys ; i++)
   {

myisam/myisamdef.h

@@ -416,6 +416,7 @@ typedef struct st_mi_sort_param
 
 #define MI_MIN_SIZE_BULK_INSERT_TREE 16384             /* this is per key */
 #define MI_MIN_ROWS_TO_USE_BULK_INSERT 100
+#define MI_MIN_ROWS_TO_DISABLE_INDEXES 100
 
 /* The UNIQUE check is done with a hashed long key */
 

sql/ha_myisam.cc

@@ -818,26 +818,19 @@ int ha_myisam::preload_keys(THD* thd, HA_CHECK_OPT *check_opt)
     deactivate_non_unique_index()
     rows		Rows to be inserted
 			0 if we don't know
-			HA_POS_ERROR if we want to disable all keys
+			HA_POS_ERROR if we want to force disabling
+                        and make it permanent (save on disk)
 */
 
 void ha_myisam::deactivate_non_unique_index(ha_rows rows)
 {
   MYISAM_SHARE* share = file->s;
-  bool do_warning=0;
   if (share->state.key_map == ((ulonglong) 1L << share->base.keys)-1)
   {
     if (!(specialflag & SPECIAL_SAFE_MODE))
     {
-      if (rows == HA_POS_ERROR)
+      if (rows == HA_POS_ERROR) // force disable and save it on disk!
-      {
-	uint orig_update= file->update;
-	file->update ^= HA_STATE_CHANGED;
-	uint check_update= file->update;
         mi_extra(file, HA_EXTRA_NO_KEYS, 0);
-	do_warning= (file->update == check_update) && file->state->records;
-	file->update= orig_update;
-      }
       else
       {
 	/*
@@ -847,14 +840,15 @@ void ha_myisam::deactivate_non_unique_index(ha_rows rows)
 	  we don't want to update the key statistics based of only a few rows.
 	*/
 	if (file->state->records == 0 &&
-	    (!rows || rows >= MI_MIN_ROWS_TO_USE_BULK_INSERT))
+	    (!rows || rows >= MI_MIN_ROWS_TO_DISABLE_INDEXES))
 	  mi_disable_non_unique_index(file,rows);
         else
+        if (!file->bulk_insert &&
+            (!rows || rows >= MI_MIN_ROWS_TO_USE_BULK_INSERT))
         {
           mi_init_bulk_insert(file,
                               current_thd->variables.bulk_insert_buff_size,
                               rows);
-	  table->bulk_insert= 1;
         }
       }
     }
@@ -863,10 +857,6 @@ void ha_myisam::deactivate_non_unique_index(ha_rows rows)
   }
   else
     enable_activate_all_index=0;
-  if (do_warning)
-    push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN, 
-			ER_ILLEGAL_HA,
-			ER(ER_ILLEGAL_HA), table->table_name);
 }
 
 
@@ -878,7 +868,6 @@ bool ha_myisam::activate_all_index(THD *thd)
   DBUG_ENTER("activate_all_index");
 
   mi_end_bulk_insert(file);
-  table->bulk_insert= 0;
   if (enable_activate_all_index &&
      share->state.key_map != set_bits(ulonglong, share->base.keys))
   {
@@ -1393,7 +1382,7 @@ longlong ha_myisam::get_auto_increment()
     return auto_increment_value;
   }
 
-  if (table->bulk_insert)
+  /* it's safe to call the following if bulk_insert isn't on */
   mi_flush_bulk_insert(file, table->next_number_index);
 
   longlong nr;

sql/sql_load.cc

@@ -280,7 +280,6 @@ int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
     table->next_number_field=table->found_next_number_field;
     VOID(table->file->extra_opt(HA_EXTRA_WRITE_CACHE,
 			    thd->variables.read_buff_size));
-    table->bulk_insert= 1;
     if (handle_duplicates == DUP_IGNORE ||
 	handle_duplicates == DUP_REPLACE)
       table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);

sql/table.h

@@ -109,7 +109,7 @@ struct st_table {
   my_bool maybe_null,outer_join;	/* Used with OUTER JOIN */
   my_bool force_index;
   my_bool distinct,const_table,no_rows;
-  my_bool key_read, bulk_insert;
+  my_bool key_read;
   my_bool crypted;
   my_bool db_low_byte_first;		/* Portable row format */
   my_bool locked_by_flush;