wait

The wait table holds information about each outstanding wait on the system.

Structure

The wait table has the following structure:

TABLE wait (
	wait_id		NUMERIC(10) 		NOT NULL,
	node_id		INTEGER			NOT NULL,
	proc_id		INTEGER 		NOT NULL,
	casenum		NUMERIC(20) 		NOT NULL,
	parentstep	VARCHAR(8),
	expression	VARCHAR(200),
	type		SMALLINT		NOT NULL)

Column	Description
wait_id	Unique ID for the wait table is generated from the sequences table.
node_id	ID of the node that the wait table is hosted on, as defined in the nodes table.
proc_id	ID of the procedure that the wait table belongs to, as defined in the proc_index table.
casenum	Case number that the wait wait belongs to, as defined in the case_information table.
parentstep	Step name of the parent step for this wait.
expression	Not used. Reserved for possible future use.
type	Wait type. Currently the only supported type is a Step wait (1), that is, the step is waiting for one or more other steps to be released.

Primary Key

The following primary key is defined for this table.

Key Name	Column(s)
pk_wait	wait_id node_id

Foreign Keys

The following foreign key is defined for this table.

Key Name	Column(s)	Referenced in Table...
fk_wait1 This key enforces the DELETE CASCADE referential action.	node_id proc_id	case_information

Indexes

The following indexes are defined for this table.

Index Name	Column(s) Indexed
idx_wait_fk	casenum proc_id node_id
idx_wait	casenum proc_id

Table Activity

The wait table contains one row for each outstanding wait on the system. An associated record exists in the wait_step table for each step being waited for.

Rows are added, updated and deleted in the following situations.

A row is...	When...
added	a new wait is triggered.
updated	never.
deleted	a wait is processed.