Mapping represents the flow of data between targets and sources. A mapping is a set of target definitions and source linked by objects of transformation which define the data transformation rules. A Mapplet is a reusable object containing a set of transformations. It enables to reuse that transformation logic in multiple mappings. A transformation is an object that generates, modifies or passes data.
So, it is a repository object. Transformations in a mapping represent the operations the Integration Service performs certain operations on the data in a mapping that are represented. Other major differences are as follows:. As shown in the below figure, Mapping is all about connecting one database to another.
These connections are made by defining a set of roles called transformation. Each transformation has definite validating elements defined called parameters and variables. To define a transformation, there should be the source and destination objects which are called Source Tables and Target objects respectively. Mapplet applies to Mapped data. As shown in the figure, the source and target objects are defined and stored in the database. A logic to transform is defined by providing a Mapplet Input transformation that passes the data from Mapping to Mapplet and then a desired Mapplet output transformation that passes data from Mapplet to Mapping.
Thus Input-Output transformations are revolved in a cycle making Mapping, transaction logic and data reused several times without affecting the data. Reusable transformation means any transition logic or rule defined on a data to transform from source to destination through mapping can be provided multiple times with different methods and the logic can be used on other transformations. It is a collection of source data objects linked by a set of transactions, targets on which the data has to move.
You can unsubscribe at any time. Hi all, Is there any difference between mapplets and reusable transformations? Because reusable transformations can be reused in multiple mappings.
Mapplets are made up of reusable transformations. Then why do we require mapplets at all? Can someone pls help me out with thi. Mapplets are a collection of transformations that work together. If you create a mapplet with 6 objects for example, expression, lookup, router, filter, expression, update strategy , you need only pull that single mapplet widget into your map.
Reusable single objects are just that, single objects. Mapplets are like macros. Reusable objects are single widgets. No redistribution. The all-new My Yahoo! Get yours free! Mail — You care about security. So do we. Could Anyone pls help me out by giving samples of mapplets,i have gone thru the help , concept are bit hazy for me, abt the input transformation and output transformation. What did u get to know abt mapplets? Mapplets are used when you need to do the exact same thing in several maps.
I built a mapplet that accepts the date as the input, then goes through a few expressions to parse the date to get the year, month, and day, and determine whether to roll GMT back 6 or 7 hours.
0コメント