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Joiner Transformation Master Detail
Suppose you have 2000 records in one table and 12000 in another which one you will consider as master and detail?


  
Total Answers and Comments: 4 Last Update: August 16, 2008     Asked by: sarun5 
  
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 Best Rated Answer
Submitted by: Sreeya
 
We will consider the one with lesser number of records as master as with this approach the data to be cached would have to be less and hence the performance can be improved.

Above answer was rated as good by the following members:
hasim_geek
February 19, 2008 07:47:57   #1  
ABHIDHAN Member Since: October 2007   Contribution: 4    

RE: Joiner Transformation Master Detail
the table contains the less no of records always being used as master detail to improve the performance....
 
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February 19, 2008 16:14:22   #2  
Sreeya Member Since: February 2008   Contribution: 3    

RE: Joiner Transformation Master Detail
We will consider the one with lesser number of records as master as with this approach the data to be cached would have to be less and hence the performance can be improved.
 
Is this answer useful? Yes | NoAnswer is useful 1   Answer is not useful 0Overall Rating: +1    
May 08, 2008 14:57:02   #3  
franticsky Member Since: May 2008   Contribution: 2    

RE: Joiner Transformation Master Detail
In order to boost performance always choose the tabel with lesser rows to be the master table
 
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August 15, 2008 13:57:49   #4  
ghola Member Since: July 2008   Contribution: 1    

RE: Joiner Transformation Master Detail
The joiner transformation compares each row of the master source against the detail source. Hence, fewer number of rows in master means fewer iterations of join comparison.

Secondly It is easier to cache the table with fewer number of rows.

Hence, using the table having the fewer number of rows as a master improves the performance.

 
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