Question

Explain the various types of connections available in Talend?

Answer 1

1. Connections in Talend define whether the data has to be processed, data output, or the logical sequence of a Job. Various types of connections provided by Talend are:

   1. Row: The Row connection deals with the actual data flow. Following are the types of Row connections supported by Talend:
      • Main
      • Lookup
      • Filter
      • Rejects
      • ErrorRejects
      • Output
      • Uniques/Duplicates
      • Multiple Input/Output
   2. Iterate: The Iterate connection is used to perform a loop on files contained in a directory, on rows contained in a file or on the database entries.
   3. Trigger: The Trigger connection is used to create a dependency between Jobs or Subjobs which are triggered one after the other according to the trigger’s nature. Trigger connections are generalized in two categories:
      1. Subjob Triggers
         • OnSubjobOK
         • OnSubjobError
         • Run if
      2. Component Triggers
         • OnComponentOK
         • OnComponentError
         • Run if
   4. Link: The Link connection is used to transfer the table schema information to the ELT mapper component.