Merge sgluhov@bk-internal.mysql.com:/home/bk/mysql-4.1

into gluh.mysql.r18.ru:/home/gluh/mysql-4.1.fix

mysql-test/r/drop.result

@@ -44,3 +44,13 @@ mysql
 test
 drop database mysqltest;
 ERROR HY000: Can't drop database 'mysqltest'; database doesn't exist
+drop table t1;
+flush tables with read lock;
+create table t1(n int);
+ERROR HY000: Can't execute the query because you have a conflicting read lock
+unlock tables;
+create table t1(n int);
+show tables;
+Tables_in_test
+t1
+drop table t1;

mysql-test/r/innodb.result

@@ -251,6 +251,18 @@ n
 6
 rollback;
 drop table t1;
+create table t1 (n int not null primary key) type=innodb;
+start transaction;
+insert into t1 values (4);
+flush tables with read lock;
+commit;
+ERROR HY000: Can't execute the query because you have a conflicting read lock
+unlock tables;
+commit;
+select * from t1;
+n
+4
+drop table t1;
 create table t1 ( id int NOT NULL PRIMARY KEY, nom varchar(64)) type=innodb;
 begin;
 insert into t1 values(1,'hamdouni');

mysql-test/t/drop.test

@@ -43,3 +43,13 @@ drop database mysqltest;
 show databases;
 --error 1008
 drop database mysqltest;
+
+# test create table and FLUSH TABLES WITH READ LOCK
+drop table t1;
+flush tables with read lock;
+--error 1223;
+create table t1(n int);
+unlock tables;
+create table t1(n int);
+show tables;
+drop table t1;

mysql-test/t/innodb.test

@@ -133,6 +133,21 @@ select n from t1;
 rollback;
 drop table t1;
 
+#
+# Test for commit and FLUSH TABLES WITH READ LOCK
+#
+
+create table t1 (n int not null primary key) type=innodb;
+start transaction;
+insert into t1 values (4);
+flush tables with read lock;
+--error 1223;
+commit;
+unlock tables;
+commit;
+select * from t1;
+drop table t1;
+
 #
 # Testing transactions
 #

sql/handler.cc

@@ -359,7 +359,10 @@ int ha_commit_trans(THD *thd, THD_TRANS* trans)
     if (trans == &thd->transaction.all && mysql_bin_log.is_open() &&
 	my_b_tell(&thd->transaction.trans_log))
     {
+      if (wait_if_global_read_lock(thd, 0))
+	DBUG_RETURN(1);
       mysql_bin_log.write(thd, &thd->transaction.trans_log);
+      start_waiting_global_read_lock(thd);
       reinit_io_cache(&thd->transaction.trans_log,
 		      WRITE_CACHE, (my_off_t) 0, 0, 1);
       thd->transaction.trans_log.end_of_file= max_binlog_cache_size;

sql/sql_table.cc

@@ -899,16 +899,18 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
     my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
     DBUG_RETURN(-1);
   }
+  if (wait_if_global_read_lock(thd, 0))
+    DBUG_RETURN(error);
   VOID(pthread_mutex_lock(&LOCK_open));
   if (!tmp_table && !(create_info->options & HA_LEX_CREATE_TMP_TABLE))
   {
     if (!access(path,F_OK))
     {
-      VOID(pthread_mutex_unlock(&LOCK_open));
       if (create_info->options & HA_LEX_CREATE_IF_NOT_EXISTS)
-	DBUG_RETURN(0);
+	error= 0;
+      else
 	my_error(ER_TABLE_EXISTS_ERROR,MYF(0),table_name);
-      DBUG_RETURN(-1);
+      goto end;
     }
   }
 
@@ -946,6 +948,7 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
   error=0;
 end:
   VOID(pthread_mutex_unlock(&LOCK_open));
+  start_waiting_global_read_lock(thd);
   thd->proc_info="After create";
   DBUG_RETURN(error);
 }