V$LOGMNR_PARAMETERS contains log information.
| Column | Datatype | Description | 
|---|---|---|
| START_DATE | DATE | Date to start the search | 
| REQUIRED_START_DATE | DATE | Required date to start the search if DDL tracking is enabled | 
| END_DATE | DATE | Date to end the search | 
| START_SCN | NUMBER | System change number to start the search | 
| REQUIRED_START_SCN | NUMBER | Required system change number to start the search if DDL tracking is enabled | 
| END_SCN | NUMBER | System change number to end the search | 
| OPTIONS | NUMBER | Options specified for the current LogMiner session | 
| INFO | VARCHAR2(32) | This column is always null. | 
| STATUS | NUMBER | This column is always 0. |