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Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 |
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# V$SQL_OPTIMIZER_ENV

`V$SQL_OPTIMIZER_ENV` displays the contents of the optimizer environment used to build the execution plan of a SQL cursor. This view can be joined with `V$SQLAREA` on (`HASH_VALUE`, `ADDRESS`) and with `V$SQL` on (`HASH_VALUE`, `CHILD_ADDRESS`).

Column | Datatype | Description
--- | --- | ---
`ADDRESS` | `RAW(4 | 8)` | Address of the parent cursor
`HASH_VALUE` | `NUMBER` | Hash value of the parent cursor in the library cache. The hash value is the fixed index for the view and should be used when querying `V$SQL_OPTIMIZER_ENV` to avoid scanning the entire library cache.
`SQL_ID` | `VARCHAR2(13)` | SQL identifier
`CHILD_ADDRESS` | `RAW(4 | 8)` | Address of the child cursor
`CHILD_NUMBER` | `NUMBER` | Child cursor number
`ID` | `NUMBER` | Unique identifier of the parameter in the optimizer environment
`NAME` | `VARCHAR2(40)` | Name of the parameter
`ISDEFAULT` | `VARCHAR2(3)` | Indicates whether the parameter is set to the default value (`YES`) or not (`NO`)
`VALUE` | `VARCHAR2(25)` | Value of the parameter