Kbase P109306: Value from a field that belongs to a VST is stuck at 2147483647
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
10/16/2008 |
|
Status: Unverified
FACT(s) (Environment):
OpenEdge 10.0x
SYMPTOM(s):
Value from a field that belongs to a VST is stuck at 2147483647
Corresponding value in promon is correct.
Value in promon is equal to or higher than 2147483648.
CAUSE:
This is expected behavior.
The counters that display correctly in promon and have values equal to or higher than 2,147,483,648 are clearly stored as 64-bit quantities in shared memory.
Unfortunately, to date the 4GL does not support 64-bit integers, and actually uses 32-bit mathematics. Therefore, when the 64-bit quantities in shared memory have to be stored as fields in the respective VST records, they must be adjusted to fit a 32-bit signed integer; because of this, there is no way that the information in the VST can be any longer accurate, and it was a conscious design decision that values that cannot fit a 32-bit signed integer should simply be clipped to the maximum value that a 32-bit signed integer can store, that is: 2,147,483,647.
FIX:
Write a 4GL program that runs promon via the OS-COMMAND statement; promon should read the input from a file containing the keystrokes necessary to view the VST field's correct value, and redirecting the standard output to a file. Then, parse the output file.
For example, in order to read the value of _ActSummary._Summary-RecReads, use:
DEFINE VARIABLE cString AS CHARACTER NO-UNDO.
DEFINE VARIABLE deValue AS DECIMAL NO-UNDO INITIAL ?.
OS-COMMAND SILENT VALUE("promon test2000 < myKeystrokes.txt > myPromon.txt").
INPUT FROM myPromon.txt.
REPEAT:
IMPORT UNFORMATTED cString.
IF cString BEGINS "Record Reads" THEN DO:
ASSIGN cString = SUBSTRING(cString, 13) /* Removes "Record Reads" */
cString = LEFT-TRIM(cString, " ") /* Removes leading spaces */
cString = ENTRY(1, cString, " ") /* Takes the first non-blank value */
deValue = DECIMAL(cString).
LEAVE.
END.
END.
INPUT CLOSE.
DISPLAY deValue FORMAT "ZZZ,ZZZ,ZZZ,ZZ9".
myKeystrokes.txt should contain the following, which directs promon to the Activity Summary screen from within the R&D options and then exits:
R&D
2
1
X