MDEV-25201 : Assertion `thd->wsrep_trx_meta.gtid.seqno == (-1)' failed in int wsrep_to_isolation_begin(THD*, const char*, const char*, const TABLE_LIST*, Alter_info*)

Test case does not assert anymore but works incorrectly. We should
not replicate PREPARE using TOI.

Author: Jan Lindström

mysql-test/suite/galera/r/enforce_storage_engine2.result

@@ -7,6 +7,7 @@ CREATE TABLE t1(i INT) ENGINE=INNODB;
 CREATE TABLE t2(i INT) ENGINE=MYISAM;
 Warnings:
 Note	1266	Using storage engine InnoDB for table 't2'
+Note	1266	Using storage engine InnoDB for table 't2'
 connection node_2;
 SHOW TABLES;
 Tables_in_test

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

@@ -35,3 +35,12 @@ SELECT COUNT(*) = 0 FROM t2;
 COUNT(*) = 0
 1
 DROP TABLE t1, t2, t3;
+SET SESSION lock_wait_timeout=2;
+SET GLOBAL wsrep_replicate_myisam= ON;
+CREATE TEMPORARY TABLE t1 (i INT, PRIMARY KEY pk (i)) ENGINE=MyISAM;
+PREPARE stmt FROM "INSERT INTO t1 (id) SELECT * FROM (SELECT 4 AS i) AS y";
+INSERT INTO t1 VALUES(4);
+DEALLOCATE PREPARE stmt;
+COMMIT;
+DROP TABLE t1;
+SET GLOBAL wsrep_replicate_myisam=OFF;

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

@@ -34,3 +34,16 @@ SELECT COUNT(*) = 0 FROM t2;
 SELECT COUNT(*) = 0 FROM t2;
 
 DROP TABLE t1, t2, t3;
+
+#
+# MDEV-25201 : Assertion `thd->wsrep_trx_meta.gtid.seqno == (-1)' failed in int wsrep_to_isolation_begin(THD*, const char*, const char*, const TABLE_LIST*, Alter_info*)
+#
+SET SESSION lock_wait_timeout=2;
+SET GLOBAL wsrep_replicate_myisam= ON;
+CREATE TEMPORARY TABLE t1 (i INT, PRIMARY KEY pk (i)) ENGINE=MyISAM;
+PREPARE stmt FROM "INSERT INTO t1 (id) SELECT * FROM (SELECT 4 AS i) AS y";
+INSERT INTO t1 VALUES(4);
+DEALLOCATE PREPARE stmt;
+COMMIT;
+DROP TABLE t1;
+SET GLOBAL wsrep_replicate_myisam=OFF;

sql/sql_base.cc

@@ -4227,6 +4227,7 @@ bool open_tables(THD *thd, const DDL_options_st &options,
       wsrep_thd_exec_mode(thd) == LOCAL_STATE          &&
       !is_stat_table((*start)->db, (*start)->alias)    &&
       thd->get_command() != COM_STMT_PREPARE           &&
+      !thd->stmt_arena->is_stmt_prepare()              &&
       ((thd->lex->sql_command == SQLCOM_INSERT         ||
         thd->lex->sql_command == SQLCOM_INSERT_SELECT  ||
         thd->lex->sql_command == SQLCOM_REPLACE        ||