predict_lock

The predict_lock table stores the locks that are used to control access to the predict table.

Structure

The predict_lock table has the following structure:

TABLE predict_lock (
	node_id		number(5)			NOT NULL,
	proc_num	number(5)		NOT NULL,
	case_num	number(20)		NOT NULL)

Column	Description
node_id	ID of the node that this prediction lock is hosted on, as defined in the nodes table.
proc_num	ID of the procedure that this prediction lock applies to, as defined in the proc_index table.
case_num	Case number of the main case that this prediction lock applies to, as defined in the case_information table.

Primary Key

The following primary key is defined for this table.

Key Name	Column(s)	Index Tablespace
pk_predict_lock	node_id proc_num case_num	SMALLINDEXSPACE

Foreign Keys

The following foreign key is defined for this table.

Key Name	Column(s)	Referenced in Table...	Column(s)
fk_predict_lock1 This key enforces the DELETE CASCADE referential action.	node_id proc_num case_num	case_information	node_id proc_id casenum

Indexes

None.

Storage

The following STORAGE values are defined for this table.

Value	Definition
Initial	SMALLTABLESIZE
Percentage Increase	SMALLTABLEPCTINCREASE
Tablespace	SMALLTABLESPACE

Note	By default, the predict and predict_lock tables use the SMALL macro values. If you intend to enable case prediction on your system, TIBCO recommends that you change these tables to use a larger value in line with the level of prediction activity you expect.

Table Activity

The predict_lock table contains one row for every main case on the system that currently has prediction data defined in the predict table. Rows are added, updated and deleted in the following situations.

A row is...	When...
added	background prediction is enabled on the iProcess Engine, and a case that has prediction enabled is started. Note: Case prediction can be enabled and disabled using the ENABLE_CASE_PREDICTION process attribute. See TIBCO iProcess Engine Administrator's Guide for more information.
updated	never.
deleted	a case that has prediction enabled is purged.