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what is driving port

  
Total Answers and Comments: 2 Last Update: February 19, 2007     Asked by:  
  
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January 16, 2007 16:11:45   #1  
Abinitio Geek Member Since: December 2005   Contribution: 2    

RE: what is driving port

In a join it is sometimes advantageous to have the Sorted-Input parameter set to Input need not be sorted . This helps when we are sure that one of the input ports has far less records than the other port and the data from that port can be held in memory. In this case we can set the other port as the driving port.

Say e.g. Port in0 has 1000 rec and in1 has 1 million records in this case we set the port in1 as driving port for which the value would be 1. By default the driving port value is 0(for in0).

Depending on the requirement sometimes it more advisable to create a lookup instead. But that depends on the requirement and design.

Hope this helps.


 
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February 19, 2007 00:52:49   #2  
shashi_dhar        

RE: what is driving port
The largest input is nothing but a driving port
 
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