1.331 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: