Tuesday, July 7, 2009

DBA_OUTLINE_HINTS

DBA_OUTLINE_HINTS describes the set of hints stored in all outlines in the database.

Related View

USER_OUTLINE_HINTS describes the set of hints stored in the outlines owned by the current user. This view does not display the OWNER column.

Column

Datatype

NULL

Description

NAME

VARCHAR2(30)

Name of the outline

OWNER

VARCHAR2(30)

Name of the user who created the outline

NODE

NUMBER

ID of the query or subquery to which the hint applies. The top-level query is labeled 1. Subqueries are assigned sequentially numbered labels, starting with 2.

STAGE

NUMBER

Outline hints can be applied at three different stages during the compilation process. This column indicates the stage at which this hint was applied.

JOIN_POS

NUMBER

Position of the table in the join order. The value is 0 for all hints except access method hints, which identify a table to which the hint and the join position apply.

HINT

VARCHAR2(512)

Text of the hint

Note:

1. Outline data are stored in three tables owned by OUTLN in the SYSTEM tablespace: OL$, OL$HINTS, OL$NODES. Those three tables can be moved out of SYSTEM tablespace to avoid SYSTEM tablespace running out of space.

Oracle data dictionary views

Oracle dynamic performance views

Last updated: July 07, 2009

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