SET @save_tdc= @@GLOBAL.table_definition_cache;
SET @save_toc= @@GLOBAL.table_open_cache;
SET GLOBAL table_definition_cache= 400;
SET GLOBAL table_open_cache= 1024;
CREATE TABLE to_be_evicted(a INT PRIMARY KEY, b INT NOT NULL) ENGINE=InnoDB;
INSERT INTO to_be_evicted VALUES(1,2),(2,1);
SET DEBUG_SYNC = 'row_log_apply_before SIGNAL scanned WAIT_FOR got_duplicate';
ALTER TABLE to_be_evicted ADD UNIQUE INDEX(b);
SET DEBUG_SYNC = 'now WAIT_FOR scanned';
BEGIN;
INSERT INTO to_be_evicted VALUES(3, 2);
SET DEBUG_SYNC = 'now SIGNAL got_duplicate';
ERROR 23000: Duplicate entry '2' for key 'b'
COMMIT;
SET DEBUG_SYNC = RESET;
FLUSH TABLES;