Fix problem where key_read was not cleaned up properly, which caused assert in innodb test.

mysql-test/r/innodb.result:
  Changed tests to make them repeatable.
mysql-test/t/innodb.test:
  Changed tests to make them repeatable.
sql/opt_sum.cc:
  Safety fix
sql/sql_base.cc:
  Safety assert

mysql-test/r/innodb.result

@@ -1139,7 +1139,7 @@ a	b
 drop table t1;
 CREATE TABLE t1 (a int not null primary key, b int not null, key (b)) type=innodb;
 CREATE TABLE t2 (a int not null primary key, b int not null, key (b)) type=innodb;
-INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(10,10),(11,11),(12,12);
 INSERT INTO t2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
 update t1,t2 set t1.a=t1.a+100;
 select * from t1;
@@ -1153,6 +1153,9 @@ a	b
 107	7
 108	8
 109	9
+110	10
+111	11
+112	12
 update t1,t2 set t1.a=t1.a+100 where t1.a=101;
 select * from t1;
 a	b
@@ -1165,6 +1168,9 @@ a	b
 107	7
 108	8
 109	9
+110	10
+111	11
+112	12
 update t1,t2 set t1.b=t1.b+10 where t1.b=2;
 select * from t1;
 a	b
@@ -1176,8 +1182,11 @@ a	b
 107	7
 108	8
 109	9
+110	10
+111	11
 102	12
-update t1,t2 set t1.b=t1.b+2,t2.b=t1.b where t1.b between 3 and 5;
+112	12
+update t1,t2 set t1.b=t1.b+2,t2.b=t1.b+10 where t1.b between 3 and 5 and t1.a=t2.a+100;
 select * from t1;
 a	b
 201	1
@@ -1188,18 +1197,21 @@ a	b
 107	7
 108	8
 109	9
+110	10
+111	11
 102	12
+112	12
 select * from t2;
 a	b
-1	5
-2	5
-3	5
-4	5
-5	5
-6	5
-7	5
-8	5
-9	5
+1	1
+2	2
+6	6
+7	7
+8	8
+9	9
+3	13
+4	14
+5	15
 drop table t1,t2;
 create table t1 (a int not null auto_increment primary key, b int, c int, key(c)) type=innodb;
 create table t2 (a int not null auto_increment primary key, b int);

mysql-test/t/innodb.test

@@ -776,7 +776,7 @@ drop table t1;
 
 CREATE TABLE t1 (a int not null primary key, b int not null, key (b)) type=innodb;
 CREATE TABLE t2 (a int not null primary key, b int not null, key (b)) type=innodb;
-INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(10,10),(11,11),(12,12);
 INSERT INTO t2 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
 
 # Full join, without key
@@ -792,7 +792,7 @@ update t1,t2 set t1.b=t1.b+10 where t1.b=2;
 select * from t1;
 
 # Range key (in t1)
-update t1,t2 set t1.b=t1.b+2,t2.b=t1.b where t1.b between 3 and 5;
+update t1,t2 set t1.b=t1.b+2,t2.b=t1.b+10 where t1.b between 3 and 5 and t1.a=t2.a+100;
 select * from t1;
 select * from t2;
 drop table t1,t2;

sql/opt_sum.cc

@@ -191,13 +191,13 @@ int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds)
 	  ref.key_buff=key_buff;
 	  TABLE *table=((Item_field*) expr)->field->table;
 
-	  if ((outer_tables & table->map) ||
-	      !find_range_key(&ref, ((Item_field*) expr)->field,conds))
+	  if ((table->file->table_flags() & HA_NOT_READ_AFTER_KEY))
 	  {
 	    const_result=0;
 	    break;
 	  }
-	  if ((table->file->table_flags() & HA_NOT_READ_AFTER_KEY))
+	  if ((outer_tables & table->map) ||
+	      !find_range_key(&ref, ((Item_field*) expr)->field,conds))
 	  {
 	    const_result=0;
 	    break;
@@ -348,7 +348,13 @@ bool part_of_cond(COND *cond,Field *field)
 }
 
 
-/* Check if we can get value for field by using a key */
+/*
+  Check if we can get value for field by using a key
+
+  NOTES
+   This function may set table->key_read to 1, which must be reset after
+   index is used! (This can only happen when function returns 1)
+*/
 
 static bool find_range_key(TABLE_REF *ref, Field* field, COND *cond)
 {

sql/sql_base.cc

@@ -482,8 +482,9 @@ bool close_thread_table(THD *thd, TABLE **table_ptr)
 {
   DBUG_ENTER("close_thread_table");
 
-  bool found_old_table=0;
-  TABLE *table=*table_ptr;
+  bool found_old_table= 0;
+  TABLE *table= *table_ptr;
+  DBUG_ASSERT(table->key_read == 0);
 
   *table_ptr=table->next;
   if (table->version != refresh_version ||

sql/sql_update.cc

@@ -62,6 +62,7 @@ int mysql_update(THD *thd,
   int		error=0;
   uint		used_index, want_privilege;
   ulong		query_id=thd->query_id, timestamp_query_id;
+  ha_rows	updated, found;
   key_map	old_used_keys;
   TABLE		*table;
   SQL_SELECT	*select;
@@ -192,9 +193,8 @@ int mysql_update(THD *thd,
 					   limit, &examined_rows)) ==
           HA_POS_ERROR)
       {
-	delete select;
 	free_io_cache(table);
-	DBUG_RETURN(-1);
+	goto err;
       }
       /*
 	Filesort has already found and selected the rows we want to update,
@@ -214,10 +214,7 @@ int mysql_update(THD *thd,
       IO_CACHE tempfile;
       if (open_cached_file(&tempfile, mysql_tmpdir,TEMP_PREFIX,
 			   DISK_BUFFER_SIZE, MYF(MY_WME)))
-      {
-	delete select; /* purecov: inspected */
-	DBUG_RETURN(-1);
-      }
+	goto err;
 
       init_read_record(&info,thd,table,select,0,1);
       thd->proc_info="Searching rows for update";
@@ -256,10 +253,7 @@ int mysql_update(THD *thd,
 	error=1; /* purecov: inspected */
       select->file=tempfile;			// Read row ptrs from this file
       if (error >= 0)
-      {
-	delete select;
-	DBUG_RETURN(-1);
-      }
+	goto err;
     }
     if (table->key_read)
     {
@@ -272,7 +266,7 @@ int mysql_update(THD *thd,
     table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
   init_read_record(&info,thd,table,select,0,1);
 
-  ha_rows updated=0L,found=0L;
+  updated= found= 0;
   thd->count_cuted_fields=1;			/* calc cuted fields */
   thd->cuted_fields=0L;
   thd->proc_info="Updating";
@@ -365,6 +359,15 @@ int mysql_update(THD *thd,
   thd->count_cuted_fields=0;			/* calc cuted fields */
   free_io_cache(table);
   DBUG_RETURN(0);
+
+err:
+  delete select;
+  if (table->key_read)
+  {
+    table->key_read=0;
+    table->file->extra(HA_EXTRA_NO_KEYREAD);
+  }
+  DBUG_RETURN(-1);
 }