abort storing query to query cache if warnings appeared (BUG#9414)

mysql-test/r/query_cache.result:
  Query with warning prohibited to query cache
mysql-test/t/query_cache.test:
  Query with warning prohibited to query cache
sql/sql_error.cc:
  abort storing query to query cache if warnings appeared

mysql-test/t/query_cache.test

@@ -730,4 +730,23 @@ flush query cache;
 
 drop table t1, t2;
 
+#
+# Query with warning prohibited to query cache (BUG#9414)
+#
+flush status;
+CREATE TABLE t1 (
+  `date` datetime NOT NULL default '0000-00-00 00:00:00',
+  KEY `date` (`date`)
+) ENGINE=MyISAM;
+
+INSERT INTO t1 VALUES ('20050326');
+INSERT INTO t1 VALUES ('20050325');
+SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0';
+SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050328 0:0:0';
+SELECT COUNT(*) FROM t1 WHERE date BETWEEN '20050326' AND '20050327 0:0:0';
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_inserts";
+show status like "Qcache_hits";
+drop table t1;
+
 set GLOBAL query_cache_size=0;

sql/sql_error.cc

@@ -108,6 +108,8 @@ MYSQL_ERROR *push_warning(THD *thd, MYSQL_ERROR::enum_warning_level level,
   if (level == MYSQL_ERROR::WARN_LEVEL_NOTE && !(thd->options & OPTION_SQL_NOTES))
     return(0);
 
+  query_cache_abort(&thd->net);
+
   if (thd->query_id != thd->warn_id)
     mysql_reset_errors(thd);