mariadb/mysql-test/suite/innodb/t/alter_primary_key.test

--source innodb_default_row_format.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc

--echo #
--echo # MDEV-23244 ALTER TABLE…ADD PRIMARY KEY fails to flag
--echo # duplicate key error from concurrent DML
--echo #

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';
send 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 ER_DUP_ENTRY
reap;
SET DEBUG_SYNC='RESET';

SELECT * FROM t1;
DROP TABLE t0,t1;