1 files changed, 25 insertions, 0 deletions
diff --git a/mysql-test/suite/innodb_fts/t/innodb-fts-ddl.test b/mysql-test/suite/innodb_fts/t/innodb-fts-ddl.test
index e8a7d603750..1ed164492d5 100644
--- a/mysql-test/suite/innodb_fts/t/innodb-fts-ddl.test
+++ b/mysql-test/suite/innodb_fts/t/innodb-fts-ddl.test
@@ -357,3 +357,28 @@ ALTER TABLE t1 ADD c SERIAL;
 DROP TABLE t1;
 
 --echo # End of 10.3 tests
+
+--echo #
+--echo #  MDEV-27582 Fulltext DDL decrements the FTS_DOC_ID value
+--echo #
+CREATE TABLE t1 (
+	f1 INT NOT NULL PRIMARY KEY,
+        f2 VARCHAR(64), FULLTEXT ft(f2)) ENGINE=InnoDB;
+INSERT INTO t1 VALUES (1,'foo'),(2,'bar');
+connect(con1,localhost,root,,,);
+START TRANSACTION WITH CONSISTENT SNAPSHOT;
+
+connection default;
+DELETE FROM t1 WHERE f1 = 2;
+ALTER TABLE t1 DROP INDEX ft;
+ALTER TABLE t1 ADD FULLTEXT INDEX ft (f2);
+INSERT INTO t1 VALUES (3, 'innodb fts search');
+SET GLOBAL innodb_optimize_fulltext_only=ON;
+OPTIMIZE TABLE t1;
+SET GLOBAL innodb_ft_aux_table = 'test/t1';
+SELECT max(DOC_ID) FROM INFORMATION_SCHEMA.INNODB_FT_INDEX_TABLE;
+SELECT * FROM t1 WHERE MATCH(f2) AGAINST("+innodb +search" IN BOOLEAN MODE);
+DROP TABLE t1;
+disconnect con1;
+SET GLOBAL innodb_optimize_fulltext_only=OFF;
+SET GLOBAL innodb_ft_aux_table = default;