How do I read a redo log in Oracle?
LogMiner retrieves information from those redo log files and returns it through the V$LOGMNR_CONTENTS view. You can then use SQL to query the V$LOGMNR_CONTENTS view, as you would any other view. Each select operation that you perform against the V$LOGMNR_CONTENTS view causes the redo log files to be read sequentially.
How do you flush a redo log?
In case you want to clear out your Redo Log files in a situation of an unexpected failure or corruption, you can use the alter table clear logfile command as follows: Sql>alter database clear logfile group 3; Clearing an Unarchived Redo Log File.
Does MySQL have redo logs?
MySQL writes to the redo log files in a circular fashion. Data in the redo log is encoded in terms of records affected; this data is collectively referred to as redo. The passage of data through the redo log is represented by an ever-increasing LSN value.
What to do if your redo log file is corrupted?
Clearing a Redo Log File A redo log file might become corrupted while the database is open, and ultimately stop database activity because archiving cannot continue. In this situation the ALTER DATABASE CLEAR LOGFILEstatement can be used to reinitialize the file without shutting down the database.
How to clear an unarchived redo log in Oracle?
If you clear an unarchived redo log file, you should make another backup of the database. If you want to clear an unarchived redo log that is needed to bring an offline tablespace online, use the UNRECOVERABLE DATAFILE clause in the ALTER DATABASE CLEAR LOGFILE statement.
Where do I drop the redo log file?
If you try to drop the redo log file whose status is CURRENT it will give you an error. Take a look at the following example: 1 INACTIVE C:\\APP\\PC\\ORADATA\\ADMIN\\ REDO04.
What happens if I clear a redo log?
If you clear a redo log needed to bring an offline tablespace online, you will not be able to bring the tablespace online again. You will have to drop the tablespace or perform an incomplete recovery.