The source qualifier transformation converts the source data types to the Informatica native data types. So, you should not alter the data types of the ports in the source qualifier transformation. The source qualifier transformation is used to do the following tasks: Joins: You can join two or more tables from the same source database. By default the sources are joined based on the primary key-foreign key relationships.
This can be changed by explicitly specifying the join condition in the "user-defined join" property. Filter rows: You can filter the rows from the source database.
Sorting input: You can sort the source data by specifying the number for sorted ports. Creating Source Qualifier Transformation: The easiest method to create a source qualifier transformation is to drag the source definition in to a mapping.
This will create the source qualifier transformation automatically. Follow the below steps to create the source qualifier transformation manually. Select the Source Qualifier transformation. Hi All, I know,The source qualifier transformation converts the source data types to the Informatica native data types. Thanks, Vijaya. This content has been marked as final. Show 3 replies. Hi All, I asked this question because in one of my interviews ,the Interviewer asked the same question to me.
Go to original post. Retrieving data Hence if we have one Source Qualifier transformation that provides data for multiple target tables having primary and foreign key relationships, we will go for Constraint based load ordering. What is a Source Qualifier? Source Qualifier Transformation is useful in Mapping, whenever we add relational flat files it is automatically created.
It is an active and connected transformation that represents those rows which are read by integration service. The Source Qualifier represents the rows that the Informatica Server reads when it executes a session. When the data we need to filter is not a relational source then the user should use Filter transformation.
It helps the user to meet specified filter condition to let go or pass through. It will directly drop the rows that do not meet the condition and multiple conditions can be specified. It determines the way in which the data is fetched from the source and is automatically added while adding a source to mapping.
The source qualifier transformation converts the source data types to the Informatica native data types. So, you should not alter the data types of the ports in the source qualifier transformation. What happens to a mapping if we alter the data types between Source and its corresponding Source Qualifier? The Source Qualifier transformation displays the Informatica data types. The transformation data types determine how the source database binds data when the Integration Service reads it.
Now if we alter the data types in the Source Qualifier transformation or the data types in the Source definition and Source Qualifier transformation do not match, the Designer marks the mapping as invalid when we save the mapping. Explain what will happen. Hence only the user defined SQL Query will be fired in the database and all the other options will be ignored. Source Filter option is used basically to reduce the number of rows the Integration Service queries, so as to improve performance.
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