~drizzle-trunk/drizzle/development

1578.3.1 by Stewart Smith
Make innobase auto_increment behaviour be the same as MyISAM on UPDATE. We also fix up auto_increment.result as the previous result was incorrect (we now match the mysql myisam test result). Also add a basic test (from the bug report) for the correct functionality
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create table t1 (a int not null auto_increment primary key, val int);
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insert into t1 (val) values (1);
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update t1 set a=2 where a=1;
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insert into t1 (val) values (1);
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drop table t1;