fixed invalidation of query cache on LOAD DATA

mysql-test/r/query_cache.result:
  test of LOAD DATA
mysql-test/t/query_cache.test:
  test of LOAD DATA

mysql-test/r/query_cache.result

@@ -553,3 +553,14 @@ Table 'test.t1' doesn't exist
 drop table t2;
 select * from t1 where id=2;
 Table 'test.t1' doesn't exist
+create table t1 (word char(20) not null);
+select * from t1;
+word
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+load data infile '../../std_data/words.dat' into table t1;
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	0
+drop table t1;

mysql-test/t/query_cache.test

@@ -384,7 +384,6 @@ select * from mysql.db;
 enable_result_log;
 show status like "Qcache_queries_in_cache";
 
-
 #
 # simple rename test
 #
@@ -397,3 +396,14 @@ select * from t1 where id=2;
 drop table t2;
 -- error 1146
 select * from t1 where id=2;
+
+#
+# Load data invalidation test
+#
+
+create table t1 (word char(20) not null);
+select * from t1;
+show status like "Qcache_queries_in_cache";
+load data infile '../../std_data/words.dat' into table t1;
+show status like "Qcache_queries_in_cache";
+drop table t1;
\ No newline at end of file

sql/sql_load.cc

@@ -336,6 +336,7 @@ int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
   }
   if (transactional_table)
     error=ha_autocommit_or_rollback(thd,error); 
+  query_cache_invalidate3(thd, table_list, 0);
 
 err:
   if (thd->lock)