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Logic: Iterate


Logic: Iterate

This task iterates the input data one entry at a time by default. If you set Iteration Type to Unique-Field, it iterates by unique values of data fields. 

The input data can be from:

  • a data export or query task
  • other tasks that output CSV files
  • direct file input by users

You must define a task after an iterate task with the For Each condition to handle further data processing for each item or unique field value. 

Optionally, you can define a downstream task for the On Complete or On Failure condition. 

Workflow will start the On Complete route when all instances of the iterated task are completed. The On Complete task will wait three hours at maximum for all instances of the iterated task to complete.


Task Settings

  • Object: The input data object. It can be a data object in the payload, or a file generated by an export task or uploaded by the user. 
  • Iteration Type: If the logic of the subsequent tasks is based on unique values of a data field, select Unique-Field. Otherwise, use Default (Every Item).
  • Chunking: If the subsequent task processes multiple items at a time, specify a number as the chunking size. Chunking is useful for bulk creating, updating, or deleting operations.
  • File Type: The input file type. Only CSV and fixed-width input files are supported.
    • CSV: This is the default option. If this option is selected, you can specify a header filter to help Workflow locate the header row. 
    • Fixed-width: Select this option if the input is a fixed-width text file. If this option is selected, the Iterate task will iterate the lines in the fixed-width file. You can specify the numbers of lines to skip from the beginning and from the end.
      If a single record in the fixed-width file spans multiple rows (lines), you can add rows and specify the starting and ending indexes of the characters that you want to extract.
  • Paths of data payload values to delete: You can delete data that is not needed, to reduce task payload size and improve performance. The payload path is in the format of Data.<objectName>.



If the preceding task is an export task, the file containing the exported data will be available in the Object list of the iterate task. The file name is the in the format of <object_name>_<a_number>


If the preceding task is a query task or other tasks that save data in the payload, the Object list can be like the following:


If you are iterating over a fixed-width file, in which each record spans multiple rows, you can add rows and specify the starting and ending indexes of characters that you want to extract. For example, the following fixed-width file contains five records, each spans four rows. There is a starting row and an ending row.

1011234567890 0910000190909140559A094101ABC COMPANY            WELLS FARGO BANK               
5200ABC COMPANY                         2222222222PPDPREMIUM   SEP 120909120001091000017000001
6260515012990123456          00000018130001234        BOB B BROWN SR          1091000010111111
799R08091000010111111      05150129                                            091000010001234
820000000200051501290000000018130000000000002222222222                         091000010000001
5200ABC COMPANY             (R)         2222222222PPDPREMIUM   SEP 120909120001091000019000002
6262642790914321123443       00000050000001333        Ronald Reed             1091000010222222
799R01091000010222222      26427909                                            091000010002345
820000000200264279090000000050000000000000002222222222                         091000010000002
5200ABC COMPANY                         1111111111PPDPREMIUM   SEP 120909120001091000017000003
6260841006385656565          00000039920001357        Sheryl S Smith          1091000010333333
799R07091000010333333      08410063                                            091000010003456
820000000200084100630000000039920000000000001111111111                         091000010000003
5200ABC COMPANY                         1111111111PPDPREMIUM   SEP 120909120001091000017000004
6261211330050120120120       00000000000001579        WAYNE WILSON            1091000010444444
798C02091000010444444      12113300121140218                                   091000010004567
820000000200121133000000000000000000000000001111111111                         091000010000004
5200ABC COMPANY                         2222222222PPDPREMIUM   SEP 120909120001091000017000005
6260653054369898989898       00000000000002345        GEORGE GONZALES         1091000010555555
798C05091000010555555      0653054337                                          091000010005678
820000000200065305430000000000000000000000002222222221                         091000010000005

You can skip the first and the last row, then add four rows in the settings.


After the workflow is run, the first record of the iteration looks like this: