What is lookup source filter in Informatica?

You can configure a lookup source filter for a relational Lookup transformation that has caching enabled. Add the lookup source filter to limit the number of lookups that the. mapping. task performs on a lookup source table.

How many types of lookups are there in Informatica?

2 different types
Lookup Transformation in Informatica can be configured to perform 2 different types of lookups.

What is lookup condition in Informatica?

The lookup condition defines when the lookup returns values from the lookup object. When you configure the lookup condition, you compare the value of one or more fields from the data flow with values in the lookup object.

What are the different types of lookup in CDI?

Table of Contents

  • Lookup object.
  • Lookup condition.
  • Lookup return fields.
  • Lookup SQL overrides.
  • Lookup source filter.
  • Field mapping. Generated key fields.
  • Persistent lookup cache.
  • Unconnected lookups.

What is lookup transformation and when is it used?

The Lookup transformation performs lookups by joining data in input columns with columns in a reference dataset. You use the lookup to access additional information in a related table that is based on values in common columns.

Can we write lookup override for flat file?

Well If you are asking that ” Is it possible to give SQL override for lookup when using flat files ” then No you can’t give Override for Lookup in case of Flat files.

Why lookup is active and passive?

Lookup is a passive transformation because it will return a value if a match is found and null or default if a match is not found. It does not changes the number of records processed and thus is a passive transformation.

What is static and dynamic lookup?

Introduction – Static vs Dynamic Lookup The lookup cache can be either static or dynamic. If the lookup cache is static (which is by default), the data in the lookup cache doesn’t change as the mapping task runs. If you enable the lookup cache to be dynamic, the cache gets updated based on the changes in the task.

Why lookup is used in ETL?

One of the common ETL operations, typically performed to calculate a field’s value, is a lookup . Given the list of input parameters, the system should be able to return a field’s value or the entire dataset, by querying a database or other data source.