Backport of revno: 2617.68.45

Bug #47635 assert in start_waiting_global_read_lock during CREATE VIEW

The problem was that CREATE VIEW would trigger an assert if
a temporary table with the same name already existed.

This bug was fixed by the patch for Bug#47335. CREATE/ALTER VIEW
will now ignore temporary tables. See Bug#47335 for more information.

Test case added to view.test.

mysql-test/r/view.result

@@ -3976,3 +3976,18 @@ SELECT * FROM v1;
 f1
 2
 DROP VIEW v1;
+#
+# Bug #47635 assert in start_waiting_global_read_lock 
+#            during CREATE VIEW
+#
+DROP TABLE IF EXISTS t1, t2;
+DROP VIEW IF EXISTS t2;
+CREATE TABLE t1 (f1 integer);
+CREATE TEMPORARY TABLE IF NOT EXISTS t1 (f1 integer);
+CREATE TEMPORARY TABLE t2 (f1 integer);
+DROP TABLE t1;
+FLUSH TABLES WITH READ LOCK;
+CREATE VIEW t2 AS SELECT * FROM t1;
+ERROR HY000: Can't execute the query because you have a conflicting read lock
+UNLOCK TABLES;
+DROP TABLE t1, t2;

mysql-test/t/view.test

+
 --disable_warnings
 drop table if exists t1,t2,t3,t4,t9,`t1a``b`,v1,v2,v3,v4,v5,v6;
 drop view if exists t1,t2,`t1a``b`,v1,v2,v3,v4,v5,v6;
@@ -3927,3 +3928,25 @@ ALTER VIEW v1 AS SELECT 2 AS f1;
 DROP TABLE v1;
 SELECT * FROM v1;
 DROP VIEW v1;
+
+
+--echo #
+--echo # Bug #47635 assert in start_waiting_global_read_lock 
+--echo #            during CREATE VIEW
+--echo #
+
+--disable_warnings
+DROP TABLE IF EXISTS t1, t2;
+DROP VIEW IF EXISTS t2;
+--enable_warnings
+
+CREATE TABLE t1 (f1 integer);
+CREATE TEMPORARY TABLE IF NOT EXISTS t1 (f1 integer);
+CREATE TEMPORARY TABLE t2 (f1 integer);
+DROP TABLE t1;
+FLUSH TABLES WITH READ LOCK;
+--error ER_CANT_UPDATE_WITH_READLOCK
+CREATE VIEW t2 AS SELECT * FROM t1;
+
+UNLOCK TABLES;
+DROP TABLE t1, t2;