Merge mysql.com:/Users/davi/mysql/bugs/31479-5.0

into  mysql.com:/Users/davi/mysql/mysql-5.0-runtime

mysql-test/r/lock_multi.result

@@ -88,3 +88,14 @@ alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1
 alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; alter table t1 auto_increment=0; //
 unlock tables;
 drop table t1;
+drop table if exists t1;
+create table t1 (a int);
+connection: locker
+lock tables t1 read;
+connection: writer
+create table t2 like t1;;
+connection: default
+kill query
+ERROR 70100: Query execution was interrupted
+unlock tables;
+drop table t1;

mysql-test/t/lock_multi.test

@@ -249,4 +249,36 @@ reap;
 connection locker;
 drop table t1;
 
+#
+# Bug#31479 Bad lock interaction if CREATE TABLE LIKE is killed
+#
+
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+create table t1 (a int);
+--echo connection: locker
+connection locker;
+lock tables t1 read;
+--echo connection: writer
+connection writer;
+let $ID= `select connection_id()`;
+--send create table t2 like t1;
+--echo connection: default
+connection default;
+let $show_type= open tables where in_use=2 and name_locked=1;
+let $show_pattern= '%t1%2%1';
+--source include/wait_show_pattern.inc
+--echo kill query
+disable_query_log;
+eval kill query $ID;
+enable_query_log;
+connection writer;
+--error ER_QUERY_INTERRUPTED
+--reap
+connection locker;
+unlock tables;
+connection default;
+drop table t1;
+
 # End of 5.0 tests

sql/sql_table.cc

@@ -2761,7 +2761,7 @@ bool mysql_create_like_table(THD* thd, TABLE_LIST* table, TABLE_LIST *src_table,
     operations on the target table.
   */
   if (lock_and_wait_for_table_name(thd, src_table))
-    goto err;
+    DBUG_RETURN(res);
 
   pthread_mutex_lock(&LOCK_open);