Ab Initio Component | SCAN:Part 2

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maintain-order(boolean, required)

• This parameter is available only when the sorted-input parameter is set to False.

• When the input is too large to fit within the memory limit specified by max-core, the maintain-order parameter, when set to True, stops the graph, ensuring that records are not reordered.

• When the parameter is set to False (the default), the component stores some of its intermediate results in temporary files on disk. This alters the order of records.

Default is False.

grouped-input (boolean, optional)

• This parameter is available only when the sorted-input parameter is set to False.

• Set this parameter to Data is grouped by a major key in order to specify the major-key by which the input is sorted or grouped. In this case, the key parameter becomes the minor key: it is the field (or fields) to be scanned.

• When you specify a major key, SCAN is more efficient in its use of memory: SCAN clears its in-memory table of intermediate results at the end of each major-key group of input records.

Default is Data is not grouped by a major key.

major-key(key specifier, optional)

• This parameter is available only when the grouped-input parameter is set to Data is grouped by a major key. Specifies a field or set of fields by which the input data is sorted or grouped. 

 check-sort(boolean, optional)

• This parameter is available only when the sorted-input parameter is set to True and the key-method parameter is set to Use key specifier.

• This parameter indicates whether the component should fail when it first encounters an input record that is out of sorted order. Setting this parameter to False effectively treats every key change as a change in group.

Default is True.
 

reject-threshold(choice, required)

• Specifies the component’s tolerance for reject event