casenum_gaps

The casenum_gaps table holds the free case number gaps.

If the case number or the subcase number generated from the sequence table reaches the maximum case number, 4294967295, then the following cases cannot be started. This table is used to create more available case numbers by reusing previous blocks of case numbers, which no longer exist. The free case numbers are available either because the case numbers have never been used or from the original cases that have been purged.

TIBCO iProcess Engine checks the casenum_gaps table to find out whether any free case numbers are available for reuse before allocating a sequence from the end of the case numbers.

The CASENUM_FIND_GAPS stored procedure adds a list of free case number gaps to the casenum_gaps table, it scans a range of case numbers and create available blocks of free case numbers for reuse. For more information, see CASENUM_FIND_GAPS.

Structure

The casenum_gaps table has the following structure:

TABLE casenum_gaps(
	casenum_min	bigint	NOT NULL,
	casenum_max	bigint	NOT NULL)

Column	Description
casenum_min	The minimum case number in a gap.
casenum_max	The maximum case number in a gap.

Primary Key

The following primary key is defined for this table.

Key Name	Column(s)
pk_casenum_gaps	casenum_min

Foreign Keys

None.

Triggers

None.

Indexes

None.

Table Activity

The casenum_gaps table contains one or more rows for each instance of each procedure definition on the system. Rows are added, updated, and deleted in the following situations.

A row is...	When...
added	running the CASENUM_FIND_GAPS stored procedure.
updated	running TIBCO iProcess Engine.
deleted	running TIBCO iProcess Engine.

See Also

CASENUM_FIND_GAPS