Add IMPORT test for MDEV-12123 Page contains nonzero PAGE_MAX_TRX_ID

mysql-test/suite/innodb/r/autoinc_persist.result

@@ -953,8 +953,24 @@ INSERT INTO t32 VALUES(0), (0);
 SELECT MAX(a) AS `Expect 6` FROM t32;
 Expect 6
 6
+FLUSH TABLES t33 FOR EXPORT;
+backup: t33
+UNLOCK TABLES;
+DROP TABLE t33;
+CREATE TABLE t33 (
+a BIGINT NOT NULL PRIMARY KEY,
+b BIGINT NOT NULL AUTO_INCREMENT,
+KEY(b)) ENGINE = InnoDB;
+ALTER TABLE t33 DISCARD TABLESPACE;
+restore: t33 .ibd and .cfg files
+ALTER TABLE t33 IMPORT TABLESPACE;
 INSERT INTO t33 VALUES(3, NULL);
 SELECT MAX(b) AS `Expect 4` FROM t33;
 Expect 4
 4
+SELECT * FROM t33;
+a	b
+10	1
+2	2
+3	4
 DROP TABLE t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t30, t32, t33;

mysql-test/suite/innodb/t/autoinc_persist.test

@@ -520,7 +520,28 @@ SELECT MAX(a) AS `Expect 2` FROM t32;
 INSERT INTO t32 VALUES(0), (0);
 SELECT MAX(a) AS `Expect 6` FROM t32;
 
+FLUSH TABLES t33 FOR EXPORT;
+let MYSQLD_DATADIR=`select @@datadir`;
+perl;
+do "$ENV{MTR_SUITE_DIR}/include/innodb-util.pl";
+ib_backup_tablespaces("test", "t33");
+EOF
+UNLOCK TABLES;
+DROP TABLE t33;
+CREATE TABLE t33 (
+a BIGINT NOT NULL PRIMARY KEY,
+b BIGINT NOT NULL AUTO_INCREMENT,
+KEY(b)) ENGINE = InnoDB;
+ALTER TABLE t33 DISCARD TABLESPACE;
+perl;
+do "$ENV{MTR_SUITE_DIR}/include/innodb-util.pl";
+ib_discard_tablespaces("test", "t33");
+ib_restore_tablespaces("test", "t33");
+EOF
+ALTER TABLE t33 IMPORT TABLESPACE;
+
 INSERT INTO t33 VALUES(3, NULL);
 SELECT MAX(b) AS `Expect 4` FROM t33;
+SELECT * FROM t33;
 
 DROP TABLE t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t30, t32, t33;