Progress
Programming
Handbook
Time Stamp Validation
For each table, Progress maintains a time stamp indicating when the schema was last changed. When compiling a procedure, Progress inserts the time stamp into the r-code for each database table accessed by the procedure. This time stamp is the value of the _Last–change field in the metaschema _File record for each table. Note that sequence changes have no effect on time stamp validation.
R-code Execution with Time Stamps
When executing a procedure using time stamp validation, Progress checks to make sure that the time stamps for all accessed tables match those contained in the r-code. If a time stamp does not match, the procedure does not execute.
To use time stamp validation, compile the procedure with each database connected using the Time Stamp (–tstamp) connection parameter. Otherwise, Progress uses CRC validation.
NOTE: The Time Stamp (–tstamp) parameter is obsolete, and is supported only for backward compatibility.
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