DBA_HIST_OPTIMIZER_ENV displays the optimizer environments that have been captured in the Workload Repository. This view is used with the DBA_HIST_SQLSTAT view.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
| DBID | NUMBER | NOT NULL | Database ID | 
| OPTIMIZER_ENV_HASH_VALUE | NUMBER | NOT NULL | Hash value for the optimizer environment | 
| OPTIMIZER_ENV | RAW(623) | Optimizer environment |