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# MDEV-7374 : Losing connection to MySQL while running ALTER TABLE
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CREATE TABLE t1(i INT) ENGINE=INNODB;
INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8);
INSERT INTO t1 SELECT a.* FROM t1 a, t1 b, t1 c, t1 d, t1 e;
ALTER TABLE t1 MODIFY i FLOAT;
DROP TABLE t1;