1.343 STAR_TRANSFORMATION_ENABLED

STAR_TRANSFORMATION_ENABLED determines whether a cost-based query transformation will be applied to star queries.

Property	Description
Parameter type	String
Syntax	STAR_TRANSFORMATION_ENABLED = { FALSE | TRUE | TEMP_DISABLE }
Default value	FALSE
Modifiable	ALTER SESSION, ALTER SYSTEM
Modifiable in a PDB	Yes
Basic	Yes

Values

• FALSE

  The transformation will not be applied.

• TRUE

  The optimizer will consider performing a cost-based query transformation on the star query.

• TEMP_DISABLE

  The optimizer will consider performing a cost-based query transformation on the star query but will not use temporary tables in the star transformation.

See Also:

• Oracle Database SQL Tuning Guide for information on enabling star queries