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I need to drop a column from a big table (about 20 GB) in a production MySQL database,
but I don’t want the MySQL server to hang or make a risk on production database.
This table is using the InnoDB engine and it contains around 10,000,000 records.
The best possible way as far as I know, is to use a MASTER-MASTER setup in mysql
You can modify MASTER1 first, and just use MASTER2 in production. Then you switch over and do the same.