MDEV-18465 Logging of DDL statements during backup

Many of the changes was needed to be able to collect and print engine
name and table version id's in the ddl log.

mysql-test/main/backup_log.test

@@ -0,0 +1,39 @@
+# Testing of logging of ddl's under backup stages
+
+--source include/have_innodb.inc
+--source include/not_embedded.inc
+
+CREATE TABLE t_exists (a INT);
+CREATE TABLE t_exists_template (a INT);
+
+connect (con1,localhost,root,,);
+BACKUP STAGE START;
+connection default;
+
+--let $part_int=
+--let $part_date=
+--source backup_log.inc
+
+--echo #
+--echo # Testing create/drop/alter database
+--echo #
+
+create database mysqltest;
+create table mysqltest.t90 (a int primary key, b int) engine=myisam;
+create table mysqltest.t91 (a int primary key, b int) engine=innodb;
+alter database mysqltest character set utf8;
+drop database mysqltest;
+
+--echo #
+--echo # MENT-222 bug testing
+--echo #
+CREATE TABLE IF NOT EXISTS t_exists LIKE t_exists_template;
+
+--source include/print_ddl_log.inc
+
+--echo #
+--echo # Cleanup
+--echo #
+DROP TABLE t_exists;
+DROP TABLE t_exists_template;
+disconnect con1;