[Left Join / Less Rows] Issue

[adamjank]

Hello,

I've experienced very, very strange situation as the SQL experienced employee.
So after Left Joining two tables, I've got less rows on the output...
For many reasons it can be more rows due to duplicates etc., but it shouldn't be less rows.

What are the possible reasons and the solutions for that critical issue?

The keys are generated via Autonumber() and it has the same seed, furthermore I haven't got the NULLs on these fields.

I'll try to prepare the file and the script.

27-3-2017 16:41:31: 0030  Binary [..\XXX.qvw]

27-3-2017 16:41:51: 0031  Let vNumberOfRows = NoOfRows('FINAL')

27-3-2017 16:41:51: 0032  Trace 4877810

27-3-2017 16:41:51: 0032  4877810

27-3-2017 16:41:51: 0033  Left  JOIN(FINAL)

27-3-2017 16:41:51: 0034  LOAD Distinct * RESIDENT D_XXX

27-3-2017 16:41:51:      11 fields found: %XXX.KEY, XXX.Name 4 516 lines fetched

27-3-2017 16:41:51:      Joining/Keeping

27-3-2017 16:42:08: 0035  Drop Table D_XXX

27-3-2017 16:42:09: 0036  Let vNumberOfRows = NoOfRows('FINAL')

27-3-2017 16:42:09: 0037  Trace 4219022

27-3-2017 16:42:09: 0037  4219022

Kind Regards,
Adam

[jonathandienst]

Yes - it seems that it is an all or nothing thing.

Your sample script with the preceding load - DISTINCT is ignored:

And without the preceding load - DISTINCT propagates:

[Peter_Cammaert]

Exactly.

I knew that your suggestion to use a RESIDENT table was the more reliable one. It still stands.

At least you got 10 virtual points from me