13.10 Tracing PLVfile ActivityPLVfile offers a standard PL/Vision toggle to allow you to dynamically turn on or off a trace of PLVfile activity. The triumvirate of programs for this toggle is: PROCEDURE show; PROCEDURE noshow; FUNCTION showing; When you call PLVfile.show , the trace is turned on (the default is that the trace is not active). Currently, PLVfile offers a trace of the get_line and put_line actions only. It can be very frustrating to work with UTL_FILE and, by extension, PLVfile. You might think that you have taken all the necessary steps to perform file I/O, but you keep getting "Invalid Operation" errors. The PLVfile trace may well be able to give you the information you need to identify your problem more easily. ![]() Copyright (c) 2000 O'Reilly & Associates. All rights reserved. |
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