FIX: Left Outer Join with "WHERE NOT IN" Clause Incorrect

• Microsoft Visual FoxPro for Windows, version 5.0

SYMPTOMS

Left Outer Join with the WHERE NOT IN clause displays the wrong fields in the cursor. The cursor replaces one of the fields that should be in the cursor with the field in the SELECT statement in the WHERE NOT IN clause.

RESOLUTION

Use the Outer Join syntax used in Visual FoxPro 3.0.

STATUS

Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem has been corrected in Visual FoxPro 5.0a for Windows.

MORE INFORMATION

Steps to Reproduce Behavior

1. Run the following code:

   
         CLOSE ALL
         ERASE one.dbf
         ERASE two.dbf
         ERASE three.dbf
         CREATE TABLE one (id c(5),first c(10))
         CREATE TABLE two (id2 c(5), secnd c(10))
         CREATE TABLE three (id3 c(5),third c(10))
         INSERT INTO one(id,first) VALUES('11111','one')
         INSERT INTO one(id,first) VALUES('22222','two')
         INSERT INTO one(id,first) VALUES('33333','three')
         INSERT INTO one(id,first) VALUES('44444','four')
   
         INSERT INTO two(id2,secnd) VALUES('11111','uno')
         INSERT INTO two(id2,secnd) VALUES('22222','duo')
         INSERT INTO two(id2,secnd) VALUES('33333','tre')
   
         INSERT INTO three(id3,third) VALUES('22222','whatever')
   
         SELECT one.id,one.first,two.id2,two.secnd  ;
            FROM one LEFT OUTER JOIN two ON one.id=two.id2 INTO CURSOR cursor1
         BROWSE NOWAIT
         SELECT one.id,one.first,two.id2,two.secnd  ;
            FROM one left OUTER JOIN two ON one.id=two.id2 WHERE two.id2 ;
              NOT IN (SELECT id3 FROM three) INTO CURSOR cursor2
         BROWSE NOWAIT 




2. Compare the two Browse windows.

REFERENCES

For more information, please see the following article in the Microsoft Knowledge Base:

Q124589 How to Create a Left-Right Outer Join in FoxPro for Windows

Additional query words:

Keywords : kbprg kbVFp kbVFp500afix kbVFp500bug FxprgSql
Version : WINDOWS:5.0
Platform : WINDOWS
Issue type : kbbug