Thursday 14 March 2024

how to skip the header in csv? in MuleSoft 133

 how to skip the header in csv? in MuleSoft

There are two primary methods to skip the header row while reading a CSV file in MuleSoft 4:

Method 1: Using the File Connector:

The File connector itself offers options to configure how the CSV data is parsed. Here's how to achieve this:

  1. Drag and drop a File connector into your flow and configure the source file path.

  2. Set the MIME Type to application/csv.

  3. Add two additional parameters:

  • header: Set this to false to indicate that the first row shouldn't be treated as a header.

  • separator: Specify the delimiter used in your CSV file (e.g., , for comma-separated).

Example configuration:


<file:inbound-endpoint path="path/to/your/file.csv" mimeType="application/csv">
    <file:csv-config header="false" separator="," />

Method 2: Using DataWeave:

DataWeave provides a powerful approach for manipulating data after it's been read. Here's how to skip the header:

  1. Read the CSV file using a suitable connector (e.g., File connector).

  2. Use the tail function in DataWeave to remove the first element (header row) from the payload:


%dw 2.0
// Assuming payload holds the CSV data
output = payload tail(size(payload) - 1);


  • The tail function retrieves all elements except the first one (header).

  • size(payload) - 1 calculates the number of elements, excluding the header.

Choosing the Right Approach:

  • File Connector: This is the simpler approach as it directly configures the parsing behavior during file reading.

  • DataWeave: While offering more flexibility for data manipulation, this method requires additional processing after reading the file.

Additional Considerations:

  • Ensure the chosen method aligns with your specific workflow requirements.

  • Error handling can be incorporated to gracefully handle cases where the file might be empty or the header row is missing.

Here are some helpful resources for further exploration:

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