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what is the difference between look up and joiner(don't say
joiner sopport only = where as look up support non-equijoin).
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Answer / kondeti srinivas
with lookup we can do left join only
but with joiner we can do all the joins(normal,master
outer,detail outer,full outer)
for mutiple matching only it will give one return value
based on lookup policy(first value or last value like that)
in lookup transformation. but in the joiner transformation
it will give the output for all the matchings
if any one knows more than this please let me know
| Is This Answer Correct ? | 12 Yes | 1 No |
Answer / akash
In addition to Kondeti's points:
1. With look up we have an option to match the data
dynamically if we use dynamic lookup.
2. If the match is not found may or may not send the record
(depending upon the joiner condition) but in case of look
up the output will be returned as default value or NULL for
every record where match is not found.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / v.ramakrishna
both lookup and joiner transfromations are used to
horizantal merging . But lookup transformation can be
treated as paasive transformation where as joiner trans can
be treated as active transfr bcoz no of records input to
joiner will vary with output records. But in Lookup
transformation even though it searches for each record in
lookup if condition satisfied it will come as output even
condition not satisfied also , in that case it returns null
valu so no of records input to lookup is equal with outputs
due to null values this is the major diff between joiner
and lookup according to me.
| Is This Answer Correct ? | 1 Yes | 0 No |
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