FIX: Left Outer Join with "WHERE NOT IN" Clause Incorrect (165308)



The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 5.0

This article was previously published under Q165308

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.
The cursor2 Browse window displays id3 instead of id2.

REFERENCES

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

124589 How to Create a Left-Right Outer Join in FoxPro for Windows


Modification Type:MajorLast Reviewed:10/16/2002
Keywords:kbBug kbProgramming kbvfp500aFIX KB165308