MDEV-8166 : Adding index on new table from select crashes Galera cluster

In wsrep, CTAS should be handled like a regular transaction.
Added a test case.

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

@@ -24,5 +24,36 @@ 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;
+SELECT * FROM t1;
+i
+1
+SELECT * FROM t1;
+i
+1
 DROP TABLE t1;
+#
+# MDEV-8166 : Adding index on new table from select crashes Galera
+# cluster
+#
+CREATE TABLE t1(i int(11) NOT NULL DEFAULT '0') ENGINE=InnoDB DEFAULT CHARSET=utf8;
+INSERT INTO t1(i) VALUES (1), (2), (3);
+CREATE TABLE t2 (i INT) SELECT i FROM t1;
+ALTER TABLE t2 ADD INDEX idx(i);
+SELECT * FROM t2;
+i
+1
+2
+3
+SELECT * FROM t2;
+i
+1
+2
+3
+SHOW CREATE TABLE t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `i` int(11) DEFAULT NULL,
+  KEY `idx` (`i`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+DROP TABLE t1, t2;
 # End of tests

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

@@ -25,10 +25,34 @@ SET @@GLOBAL.wsrep_forced_binlog_format=@wsrep_forced_binlog_format_saved;
 --echo #
 --echo # MDEV-7673: CREATE TABLE SELECT fails on Galera cluster
 --echo #
+--connection node_1
 CREATE TABLE t1 (i INT) ENGINE=INNODB DEFAULT CHARSET=utf8 SELECT 1 as i;
+SELECT * FROM t1;
 
+--connection node_2
+SELECT * FROM t1;
 # Cleanup
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-8166 : Adding index on new table from select crashes Galera
+--echo # cluster
+--echo #
+--connection node_1
+CREATE TABLE t1(i int(11) NOT NULL DEFAULT '0') ENGINE=InnoDB DEFAULT CHARSET=utf8;
+INSERT INTO t1(i) VALUES (1), (2), (3);
+
+CREATE TABLE t2 (i INT) SELECT i FROM t1;
+ALTER TABLE t2 ADD INDEX idx(i);
+
+SELECT * FROM t2;
+
+--connection node_2
+SELECT * FROM t2;
+SHOW CREATE TABLE t2;
+
+# Cleanup
+DROP TABLE t1, t2;
+
 --echo # End of tests
 

sql/sql_parse.cc

@@ -2917,17 +2917,10 @@ case SQLCOM_PREPARE:
         if (create_info.options & HA_LEX_CREATE_TMP_TABLE)
           thd->variables.option_bits|= OPTION_KEEP_LOG;
 
-#ifdef WITH_WSREP
-        if (WSREP(thd) &&
-            (!thd->is_current_stmt_binlog_format_row() ||
-             !(create_info.options & HA_LEX_CREATE_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.
+          Note: In wsrep-patch, CTAS is handled like a regular transaction.
         */
         if ((result= new select_create(create_table,
                                        &create_info,