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-rw-r--r--mysql-test/suite/versioning/r/alter.result17
1 files changed, 17 insertions, 0 deletions
diff --git a/mysql-test/suite/versioning/r/alter.result b/mysql-test/suite/versioning/r/alter.result
index d0aa49f2fde..e07f1408ab7 100644
--- a/mysql-test/suite/versioning/r/alter.result
+++ b/mysql-test/suite/versioning/r/alter.result
@@ -746,6 +746,23 @@ alter table t1 add column y timestamp(6) as row start;
ERROR HY000: Table `t1` is not system-versioned
drop table t1;
#
+# MDEV-25327 Unexpected ER_DUP_ENTRY upon dropping PK column from system-versioned table
+#
+create table t1 (pk int, a int, primary key (pk), key (a))
+with system versioning;
+insert into t1 values (1, 1), (2, 2);
+delete from t1;
+set system_versioning_alter_history= keep;
+alter table t1 drop pk;
+drop table t1;
+create table t1 (pk int, a int, primary key (pk), key (a))
+with system versioning;
+insert into t1 values (1, 2), (2, 8), (3, 4), (4, 4), (5, 0);
+delete from t1;
+set system_versioning_alter_history= keep;
+alter ignore table t1 drop pk;
+drop table t1;
+#
# MDEV-21941 RENAME doesn't work for system time or period fields
#
create or replace table t1 (a int) with system versioning;