#
# MDEV-23244 ALTER TABLE…ADD PRIMARY KEY fails to flag
# duplicate key error from concurrent DML
#
CREATE TABLE t0 (pk INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t1 (c CHAR(2) NOT NULL) ENGINE=InnoDB;
INSERT INTO  t1 VALUES('cd');
connect  con1,localhost,root,,;
BEGIN;
INSERT INTO t0 VALUES(1);
connection default;
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL dml WAIT_FOR dml_done';
ALTER TABLE t1 ADD PRIMARY KEY(c(1));
connection con1;
SET DEBUG_SYNC='now WAIT_FOR dml';
INSERT INTO t1 VALUES ('ab'),('ac');
COMMIT;
SET DEBUG_SYNC='now SIGNAL dml_done';
disconnect con1;
connection default;
ERROR 23000: Duplicate entry 'a' for key 'PRIMARY'
SET DEBUG_SYNC='RESET';
SELECT * FROM t1;
c
cd
ab
ac
DROP TABLE t0,t1;