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Talend tMap Complete Reference


 

Talend tMap Complete Reference

In this article, I will cover talend tmap expressions and filtering. Talend tmap is a powerful data integration tool that can be used to join and filter data. The tmap component is found in the talend studio palette.

The tmap component has two main sections: the left section is for input data and the right section is for output data. The input and output sections can be connected by one or more joins.

The tmap join expressions are very powerful and allow you to filter data in several ways. In this article, we will look at the tmap output rejects.

The tmap output rejects allow you to filter data as it is written to the output. You can use the tmap output rejects to filter data by row, column, or any other expression.


Example:

In this article, we will look at an example of how to use the tmap output rejects. We will use a simple table with two columns: id and name. We will filter the data to show only those records that have a name equal to 'exp_word'.

First, create a talend tmap component and connect the input data. In this case, we will use a talend file input for the input data.

After creating the talend tmap component, go to the properties tab and select the joins tab. The joins tab is where you will define the joins that are used by talend tmap.

Select the 'inner join' radio button to create an inner join between both tables. talend tmap performs inner joins by default so there is no need to create any additional expressions in this case. The last two parameters must be left at their default values.

Next, select the 'output rejects' tab. The output rejects tab is where you will define the filters for the tmap output.

In this case, we want to filter the data to show only those records that have a name equal to 'exp_word'. To do this, we will use the expression 'name == "exp_word"' as the filter.

Click the OK button to save the filter. Talend tmap will now only write those records to the output that have a name equal to 'exp_word'.

You can also use tMap for various tasks and I have listed them down below. I have created a video so that I can demonstrate all these features. You can watch my video and the link is posted below for my YouTube channel.

  1. talend tmap component
  2. tmap joins expressions and filtering
  3. tmap output rejects
  4. tmap joins in talend
  5. how to perform tmap inner join rejects in talend
  6. filter data by row
  7. filter data by column
  8. filter data by expression
  9. talend file input
  10. inner join
  11. output rejects
  12. expression
  13. filter data

talend tmap is a powerful data integration tool that can be used to join and filter data. The tmap component is found in the talend studio palette.


YouTube Video

I have also created a video in my YouTube channel about the talend tmap tutorial. Please subscribe to my YouTube channel for more updates.

Title: talend t map tutorial

Keywords to include: talend t map tutorial, talend t map expressions, talend t map filtering, talend t map joins, talend t map output rejects, how to perform the inner join in talend using tmap, talend t map component, talend studio palette.


Follow Me

You can also find me on:

-LinkedIn: https://www.linkedin.com/in/rohan-b-suresh

-Facebook: https://www.facebook.com/talend101

-YouTube: https://www.youtube.com/learningwithrohan


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Location: India

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