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Q140300: FIX: SQL SELECT Returns Different Results Using the Same Data

Article: Q140300
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0
Operating System(s): 
Keyword(s): kbbuglist kbfixlist
Last Modified: 24-MAR-2000

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 3.0 
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SYMPTOMS
========

The number of records returned from the same SQL SELECT statement on the same
data is different.

STATUS
======

Microsoft has confirmed this to be a problem in the Microsoft products listed at
the beginning of this article. This problem was corrected in Visual FoxPro 3.0b
for Windows.

MORE INFORMATION
================

Steps to Reproduce Problem
--------------------------

The following program displays the number of records returned from two
consecutive SQL statements. Note that different numbers are returned.

     SET SAFETY OFF
     CLOSE ALL

     CREATE TABLE main (num N(1), link C(50), crit C(50))
     INSERT INTO main VALUES (1, "YES", "YES")
     INSERT INTO main VALUES (2, "NO", "YES")
     INSERT INTO main VALUES (3, "NO", "NO")
     INSERT INTO main VALUES (4, "YES", "NO")

     CREATE TABLE link (link C(50))
     INSERT INTO link VALUES ("YES")

     CLOSE ALL
     CLEAR

     FOR i = 1 TO 2

        lcTmpFile = "tmp" + ALLTRIM(STR(i)) + ".dbf"
        IF FILE(lcTmpFile)
           ERASE (lcTmpFile)
        ENDIF

        SELECT num, link, crit FROM main ;
           WHERE ((main.link IN (SELECT link.link FROM link)) OR ;
              (crit = "YES")) INTO TABLE (lcTmpFile)

        ? _TALLY

     ENDFOR

Additional query words: VFoxWin buglist3.00 fixlist3.00b

======================================================================
Keywords          :  kbbuglist kbfixlist
Technology        : kbVFPsearch kbAudDeveloper kbVFP300
Version           : WINDOWS:3.0
Issue type        : kbbug
Solution Type     : kbfix

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