MDEV-7673: CREATE TABLE SELECT fails on Galera cluster

Enable execution of CREATE TABLE SELECT in total order isolation. Added
a test case.

Contributed by : Andrew W Elble

mysql-test/suite/galera/r/create.result

@@ -20,4 +20,9 @@ i
 1
 DROP TABLE t1;
 SET @@GLOBAL.wsrep_forced_binlog_format=@wsrep_forced_binlog_format_saved;
+#
+# MDEV-7673: CREATE TABLE SELECT fails on Galera cluster
+#
+CREATE TABLE t1 (i INT) ENGINE=INNODB DEFAULT CHARSET=utf8 SELECT 1 as i;
+DROP TABLE t1;
 # End of tests

mysql-test/suite/galera/t/create.test

@@ -22,5 +22,13 @@ SELECT * FROM t1_temp;
 DROP TABLE t1;
 SET @@GLOBAL.wsrep_forced_binlog_format=@wsrep_forced_binlog_format_saved;
 
+--echo #
+--echo # MDEV-7673: CREATE TABLE SELECT fails on Galera cluster
+--echo #
+CREATE TABLE t1 (i INT) ENGINE=INNODB DEFAULT CHARSET=utf8 SELECT 1 as i;
+
+# Cleanup
+DROP TABLE t1;
+
 --echo # End of tests
 

sql/sql_parse.cc

@@ -3284,6 +3284,14 @@ case SQLCOM_PREPARE:
         /* Store reference to table in case of LOCK TABLES */
         create_info.table= create_table->table;
 
+#ifdef WITH_WSREP
+        if (WSREP(thd) &&
+            (!thd->is_current_stmt_binlog_format_row() ||
+             !(create_info.tmp_table())))
+          WSREP_TO_ISOLATION_BEGIN(create_table->db, create_table->table_name,
+                                   NULL)
+#endif
+
         /*
           select_create is currently not re-execution friendly and
           needs to be created for every execution of a PS/SP.