See Thread at: http://www.techienuggets.com/Detail?tx=78262 Posted on behalf of a User
I have no problems in copying MEDIUMBLOB type data from one table to another. Under either 5.0 or 5.1 community editions. In Response To: hi, I found this: http://bugs.mysql.com/bug.php?id=34300 in the bug system. As it descibed, there is chance which I get corrupted data when read BLOB. Now I wonder why I also get corrupted data when write BLOB into table... I tried this: step 1: read BLOB data from TABLE1 step 2: log the BLOB data step 3: write the data into TABLE2 result: select hex(data) from TABLE1 is the same as what I've logged in step2 select hex(data) from TABLE2 is different with select hex(data) from TABLE2 Any suggestions? 2009/3/19 Cui Shijun <no...@spam.com>: > hi, > Â I'm using mysql-5.1.22, innodb. For some reason, I need to add some > columns to a table without locking it, so I do this: > > Â Â insert into TABLE2(col1, col2, ... ,colN) select col1, col2, ... > colN from TABLE1 where ...(primary key traversal condition). > > Â which TABLE1 is under use, and TABLE2 has new structure. > Â Before I really do the copy task, I created some triggers to > synchronize the insert & update. > > Â When I finally complete the task, I find ALL blob column appear to > result in inconsistent status with the orignal table. > Â There are users which do query and update on TABLE1. > Â So what's going wrong? > > Â Thank you > Â Â Â Cui Shijun > -- -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
