Answer / sohanvarma

Reformat->Changes the record format of your data by
dropping fields or by using DML expressions to add fields,
combine fields, or modify the data.


Redefine Format->Copies data records from its input to its
output without changing the values. Use Redefine Format to
change a record format or rename fields.

Answer / quesanswer

This was the answer i gave........
reformat performs the deriving new data by adding fields
dropping fields redefine format using for rename fields
The difference between Reformat and Redefine Format is that
Reformat can actually change the bytes in the data while
Redefine Format simply changes the record format on the data
as it flows through, leaving the data unchanged.

but then i was asked that renaming the feild and creating it
into a single record can be done bby reformat as well.then
waht is the use of redefine.

Answer / avijit

Redefine format is best suitable in the following scenario.

Suppose we are reading the data from the input in a single line like a srting("
") and now that string i want to map into the different fields but i do not want to change the data then in the output dml of the redefine format i can specify the dml.

it will get the data mapped to the different fields.

Answer / jak

in define format we cant change the dml.
it is used in merge ,concate

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