I need to process a CSV file having variable list of columns , in few scenarios , not all columns are sent in the CSV file , which node can help me validate to proceed with furthering of the nodes only if the respective column is present. The column names in the CSV file are fixed. For example if the column headers in the CSV are : Data_US, DATA_FR, DATA_CZ, DATA_NB , DATA_CZ . I have specific processing to be done for each column . If only DATA_US and DATA_NB are present in the CSV file , only then the nodes having processing for DATA_US and DATA_NB should be processed. How can I add check before column filter to validate existence of the columns .
Tried Extract Table Spec along with Rule Engine, but cannot find way disable execution of nodes if the column is not present
Appreciate help on the above