V$SQL_OPTIMIZER

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