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select * from t1 where a is null and b=9 or a is null and b=7 limit 3;
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select * from t1 where a > 1 and a < 3 limit 1;
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select * from t1 where a > 8 and a < 9;
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insert into t2 select * from t1;
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alter table t1 modify b blob not null, add c int not null, drop key a, add unique key (a,b(20),c), drop key b, add key (b(10));
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# @TODO Should this be a MyISAM-specific test or not?