pt-online-schema-change --set-vars innodb_lock_wait_ti meout=50 --host=localhost --alter-foreign-keys-method=auto user=tfuser --ask -pass --alter " ADD INDEX indAppPostCodeAnywhere (Forename, Surname, DOB, Applic ationDate)" D=DBName,t=Application --dry-run
Usage: pt-online-schema-change [OPTIONS] DSN Errors [COLOR=#00008B]in command-line arguments: * Specify only one DSN [COLOR=#00008B]on the command line * The DSN must specify a [COLOR=#00008B]database (D) [COLOR=#00008B]and a [COLOR=#00008B]table (t) pt-online-schema-change alters a [COLOR=#00008B]table’s structure without blocking reads or writes. Specify the database and table in the DSN. Do not use this tool before reading its documentation and checking your backups carefully. For more details, please use the --help option, or try ‘perldoc /usr/bin/pt-online-schema-change’ [COLOR=#00008B]for complete documentation.