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LINC Programming Reference Manual - Public Support Login - Unisys

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PURGE (PU)<br />

PURGE (PU)<br />

Syntax<br />

Example<br />

<strong>Reference</strong>s<br />

The PURGE; command physically deletes the most recently accessed Component or Event<br />

record from the <strong>LINC</strong> database.<br />

This physical record deletion is performed immediately, (but not committed until the end<br />

of the transaction). Logically, for the user performing the PURGE, the PURGE takes effect<br />

immediately. If a LOOK.UP; follows a PURGE within the same transaction, the record will<br />

not be found. For other users, the record will be locked.<br />

Caution<br />

The PURGE; command causes all access paths to the Ispec record to be physically<br />

removed from the <strong>LINC</strong> database. This is the same as when the System Data item<br />

MAINT is given the value PUR.<br />

This is not a logical delete, as when the System Data item MAINT is given the value<br />

DEL.<br />

PURGE permanently breaks all physical and logical relationships with the records on<br />

which it operates. The disk space that was occupied is immediately available for use by<br />

other records of the Ispec, when the transaction is completed.<br />

To release the disk space for other uses, run the <strong>LINC</strong> Database Management Utility (DMU,<br />

or GMU for Griffin databases on UNIX <strong>LINC</strong> Systems).<br />

DDDDD DDDDBDDDD DDDDDBDDDDDDDDDDDDDDDDD4<br />

3 3<br />

@DDDDDD DDDDDDDY<br />

<br />

<br />

<br />

<br />

<br />

‘‘MAINT’’.<br />

The Database Management Utility (DMU and GMU) in your <strong>LINC</strong> Administration and<br />

Operations Guide for the relevant host type.<br />

1-198 v

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