on 08-19-2015 11:12 AM
Hi Experts ,
Can you please explain
What is the difference between Lookup and Table comparison transformation on SAP BODS
Thanks,
Pavan M
+91-9741568083
Hi Pavan,
The lookup() is a function call used in data services which retrieves a value in a table or file based on the values in a different source table or file whereas a Table comparison transform is a transform which compares two data sets and produces the difference between them as a data set with rows flagged as INSERT, UPDATE, or DELETE i.e in simple terms you are comparing Source and Target table and asking the transform what exactly has changed(upsert).
You can use the lookup inside the query transform, mappings of columns.
Theoretically a lookup is similar to a SQL function call. A function takes one or multiple values as input and returns one (or multiple) value as output.
Lookups in SAP BODI/DS | A small notes. . .
Table comparison is used for detecting Target based CDC
http://scn.sap.com/docs/DOC-40942
Hope the above links will be useful for you to understand Table comparison.
Regards
Arun Sasi
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