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Lookup expression avoid null value
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Topic: Lookup expression avoid null value (Read 1108 times)
shankar.singu
DW Fresher
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Lookup expression avoid null value
«
on:
May 27, 2010, 04:54:45 pm »
Hi,
1. I have productDetails Table with ProductID and ProductName columns
2. The productDetails table is my lookup table. I have given input port product_id (from another source) and in lookup expression condition given ProductID = product_id.
3. When product_id does not exist in product table, the lookup will return productName as null value.
4. I wanted to skip this meaning When the product id does not exists in lookup table then I don’t want to keep product name as null in target.
Can anyone pls tell me how to avoid?
Regards,
Sankar. S
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srikanth471
DW Fresher
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Re: Lookup expression avoid null value
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Reply #1 on:
May 30, 2010, 04:47:34 pm »
hi
Generally when ur looking up into a table , if the i/p link to the look up doesn't match with the look up table data it will reject it. no need to specify for it.
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shankar.singu
DW Fresher
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Posts: 16
Re: Lookup expression avoid null value
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Reply #2 on:
May 31, 2010, 10:54:57 am »
Hi,
Not able to follow your words "look up table data it will reject it". Pls explain with an example which would help to understand easily.
The actual scenario is very simple,
-----------------------------
Lookup Table: ProductDetails
-----------------------------
ProductID ProductName
=========================
1234 Lux
1235 Hamam
I will pass ProductID 1234 and
get /return
productName (now Lux).
in TargetTable the value would be
ProductCode ProductDescription
============================
1234 Lux
But if I pass productId value 3333 then I will get productName which is nothing but
null
since the product id does not exist in lookup table.
Now the target table.
ProductCode ProductDescription
============================
1234 Lux
3333
Now my question is how to avoid to keep null value in ProductDescription. Is there any way to handle this problem in lookup transformation itself instead of using any addtional transformation.
Regards,
Sankar. S
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