Source Qualifier Transformation in Informatica - Shikshaglobe

Content Creator: Vijay Kumar

Source Qualifier Transformation in Informatica with EXAMPLE


What is Source Qualifier Transformation?

Source qualifier change is a functioning, associated change that is utilized to address the lines that the reconciliations administration read. Whenever we add a social source or a level document to planning, a source qualifier change is required. At the point when we add a source to planning, source qualifier change is added consequently. With source qualifier, we can characterize and supersede how the information is gotten from the source.


In the accompanying model, we would adjust the source qualifier of our planning "m_emp_emp_target", so rather than returning every one of the segments it will return just chosen sections.


Stage 1 - Open planning "m_emp_emp_target" in planning fashioner.

Source Qualifier Transformation in Informatica with EXAMPLE


Stage 2 - Double snap on the source Qualifier change "SQ_EMP". It will open alter change property window for it. Then

Click on the properties tab

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Click on the SQL Query Modify choice, this will open a SQL supervisor window

Source Qualifier Transformation in Informatica with EXAMPLE

Understanding the Source Qualifier Transformation

What is a Source Qualifier Transformation?

The Source Qualifier Transformation, often referred to as SQ, is a fundamental building block in Informatica's ETL architecture. It plays a crucial role in reading data from source systems, making it suitable for further processing within Informatica workflows.

Significance of the Source Qualifier Transformation

The Source Qualifier Transformation offers several key advantages:

  • Data Integration: It enables the integration of data from various source systems, such as databases, flat files, or even web services.
  • Data Filtering: Source Qualifiers can filter data, allowing you to retrieve only the relevant information required for downstream processing.
  • Data Transformation: While primarily designed for reading data, Source Qualifiers can also perform basic transformations like data type conversions.
  • Performance Optimization: When properly configured, Source Qualifiers can optimize the data extraction process for improved performance.

Working with Source Qualifier Transformation

Configuration and Customization

To utilize the Source Qualifier Transformation, you must configure it within your Informatica mapping. This involves specifying the connection details, selecting the source object (e.g., table or file), and defining any filtering conditions if necessary.

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Advanced Configuration

Advanced users can leverage the SQL override option within the Source Qualifier Transformation. This allows custom SQL queries to be used for data extraction, providing fine-grained control over data retrieval.

Source Dependency

It's important to note that any changes to the source structure, such as adding or removing columns, may require corresponding updates in the Source Qualifier transformation to ensure data compatibility.

Best Practices for Source Qualifier Transformation

To maximize the efficiency and effectiveness of the Source Qualifier Transformation, consider the following best practices:

1.     Minimize Data Extraction: Only retrieve the data that is necessary for downstream processes. Unnecessary data extraction can impact performance.

2.     Use SQL Overrides Judiciously: While SQL overrides offer flexibility, use them sparingly and ensure they are well-tested to avoid unexpected issues.

3.     Document Your Mapping: Clearly document the purpose and configuration of the Source Qualifier Transformation within your mapping for future reference and collaboration.

4.     Regularly Validate Source Metadata: Keep the Source Qualifier updated with any changes in source metadata to prevent data integration errors.

Stage 3 - In the SQL supervisor window

Enter the accompanying question

SELECT EMPNO, ENAME, JOB, MGR FROM EMP


Note - we are choosing the segments EMPNO, ENAME, JOB, and MANAGER from the source, so we have kept just those in the select question

Select OK Button

Source Qualifier Transformation in Informatica with EXAMPLE

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Stage 4 - In the "alter changes" window,

Select the Ports tab from the menu

Under the ports tab, you will see every one of the ports. Keep just the ports EMPNO, ENAME, JOB, and MGR and erase different ports

Source Qualifier Transformation in Informatica with EXAMPLE


Stage 5 - After erasure of ports, Select OK Button

Source Qualifier Transformation in Informatica with EXAMPLE

Presently, again click on the properties tab in the Edit Transformations window, and you will see just the information that you have chosen.

Source Qualifier Transformation in Informatica with EXAMPLE

At the point when you click on the "Alright" button it will open SQL Editor Window, and

Click here for details

It will affirm the information you have chosen is right and prepared for stacking into the objective table

Click on the OK button to process further

Source Qualifier Transformation in Informatica with EXAMPLE

Save the planning (utilizing ctrl+s Shortcut) and execute the work process, after execution just the chosen sections will be stacked into the objective.

Along these lines, you can supersede in source qualifier what segments should be gotten from the source and this is the best way to abrogate what explicit sections will be brought inside the planning.


Properties of Source Qualifier

You can utilize different properties of Source Qualifier, to figure out what kind of source information necessities to change to the target table.

Source Filter - Using the source channel property you can channel the number of source records. For instance, you need to bring just the representatives of deptno 10, then, at that point, you can enter the channel condition deptno=10 in the source channel property and execute the information.

The number for arranged ports - In source qualifier change, you can likewise sort the information records in light of the ports number. So when the information is given to the changes inside the planning, it will peruse the port number and sort the information as needs are.

As information can be arranged in light of solitary or various ports, you need to give the number of ports that will be utilized in sort. On the off chance that you give esteem as 1, just empno information will be arranged. In the event that you give esteem as 2, on empno and ename on the two segments, information will be arranged.

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Select Distinct - you can get just unmistakable records from the source utilizing this property. At the point when you select the select particular choice, just an unmistakable blend of source information will be brought by the source qualifier.


Read More :

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Source Qualifier Transformation in Informatica
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