-- source include/have_innodb.inc
-- source include/not_embedded.inc

#
# Bug #68148: drop index on a foreign key column leads to missing table
# MDEV-8845: Table disappear after modifying FK
#

set global innodb_file_per_table=1;

CREATE TABLE ref_table1 (id int(11) NOT NULL, PRIMARY KEY(id)) ENGINE=InnoDB; 

CREATE TABLE ref_table2 (id int(11) NOT NULL, PRIMARY KEY(id)) ENGINE=InnoDB;

CREATE TABLE `main` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `ref_id1` int(11) NOT NULL,
  `ref_id2` int(11) NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `idx_1` (`ref_id1`,`ref_id2`),
  KEY `FK_set_out_analysis_route_id` (`ref_id2`),
  CONSTRAINT `FK_1` FOREIGN KEY (`ref_id1`) REFERENCES `ref_table1` (`id`) ,
  CONSTRAINT `FK_2` FOREIGN KEY (`ref_id2`) REFERENCES `ref_table2` (`id`)
) ENGINE=InnoDB;

SET FOREIGN_KEY_CHECKS=0;

DROP INDEX `idx_1` ON `main`;
SHOW TABLES;

--source include/restart_mysqld.inc

ALTER TABLE `main` ADD INDEX `idx_1` (`ref_id1`);
SHOW CREATE TABLE `main`;

DROP TABLE  main, ref_table1, ref_table2;