MDEV-30796 Auto_increment values not updated after bulk insert operation

- InnoDB fails to update the autoinc persistently after
bulk insert operation.

row_merge_bulk_t::write_to_index(): Update the autoinc value
persistently

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

@@ -28,3 +28,17 @@ DROP DATABASE db1;
 #
 # End of 10.6 tests
 #
+#
+# MDEV-30796  Auto_increment values not updated after bulk
+#              insert operation
+#
+CREATE TABLE t1(f1 INT NOT NULL AUTO_INCREMENT,
+f2 INT NOT NULL, PRIMARY KEY(f1))ENGINE=InnoDB;
+INSERT INTO t1 VALUES(1, 2), (25, 3), (2, 4);
+# restart
+INSERT INTO t1(f2) VALUES(5);
+SELECT max(f1) FROM t1;
+max(f1)
+26
+DROP TABLE t1;
+# End of 10.9 tests

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

@@ -41,3 +41,17 @@ DROP DATABASE db1;
 --echo #
 --echo # End of 10.6 tests
 --echo #
+
+--echo #
+--echo # MDEV-30796  Auto_increment values not updated after bulk
+--echo #              insert operation
+--echo #
+CREATE TABLE t1(f1 INT NOT NULL AUTO_INCREMENT,
+		f2 INT NOT NULL, PRIMARY KEY(f1))ENGINE=InnoDB;
+INSERT INTO t1 VALUES(1, 2), (25, 3), (2, 4);
+--source include/restart_mysqld.inc
+INSERT INTO t1(f2) VALUES(5);
+SELECT max(f1) FROM t1;
+DROP TABLE t1;
+
+--echo # End of 10.9 tests

storage/innobase/row/row0merge.cc

@@ -5336,6 +5336,8 @@ dberr_t row_merge_bulk_t::write_to_index(ulint index_no, trx_t *trx)
 func_exit:
   if (err != DB_SUCCESS)
     trx->error_info= index;
+  else if (index->is_primary() && table->persistent_autoinc)
+    btr_write_autoinc(index, table->autoinc);
   err= btr_bulk.finish(err);
   return err;
 }