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******************************* * basic concurent online alter test ******************************* * With Commit ******************************* CREATE TABLE t1 (a INT UNSIGNED KEY, b INT UNSIGNED) ENGINE NDB; begin; update t1 set b = 0 where a = 1; update t1 set b = 1 where a = 2; delete from t1 where a = 3; insert into t1 values (5,5),(6,6); update t1 set b = 0 where a = 6; ALTER TABLE t1 ADD c CHAR(19), ADD d VARCHAR(255), ADD e char(255); Warnings: Warning 1478 Converted FIXED field 'c' to DYNAMIC to enable on-line ADD COLUMN Warning 1478 Converted FIXED field 'd' to DYNAMIC to enable on-line ADD COLUMN Warning 1478 Converted FIXED field 'e' to DYNAMIC to enable on-line ADD COLUMN update t1 set b = 0 where a = 2; update t1 set b = 0 where a = 4; update t1 set b = 0 where a = 5; insert into t1 values (7,0,null,null,null),(8,0,'8','8','8'); commit; SELECT * FROM t1 ORDER BY a; a b c d e 1 0 NULL NULL NULL 2 0 NULL NULL NULL 4 0 NULL NULL NULL 5 0 NULL NULL NULL 6 0 NULL NULL NULL 7 0 NULL NULL NULL 8 0 8 8 8 DROP TABLE t1; ******************************* * basic concurent online alter test ******************************* * With Rollback ******************************* CREATE TABLE t1 (a INT UNSIGNED KEY, b INT UNSIGNED) ENGINE NDB; begin; update t1 set b = 0 where a = 1; update t1 set b = 1 where a = 2; delete from t1 where a = 3; insert into t1 values (5,5),(6,6); update t1 set b = 0 where a = 6; ALTER TABLE t1 ADD c CHAR(19), ADD d VARCHAR(255), ADD e char(255); Warnings: Warning 1478 Converted FIXED field 'c' to DYNAMIC to enable on-line ADD COLUMN Warning 1478 Converted FIXED field 'd' to DYNAMIC to enable on-line ADD COLUMN Warning 1478 Converted FIXED field 'e' to DYNAMIC to enable on-line ADD COLUMN update t1 set b = 0 where a = 2; update t1 set b = 0 where a = 4; update t1 set b = 0 where a = 5; insert into t1 values (7,0,null,null,null),(8,0,'8','8','8'); rollback; SELECT * FROM t1 ORDER BY a; a b c d e 1 1 NULL NULL NULL 2 2 NULL NULL NULL 3 3 NULL NULL NULL 4 4 NULL NULL NULL DROP TABLE t1;