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Read the first 100 lines from a huge csv file on S3

 

There are multiple huge csv files in a storage bucket on S3; the files have different column names.

Use Java to do this: Return each csv file’s first 100 lines using the file name as the parameter.

Here is the SPL script:

A

1

=s3_open("ASIAVSPDUYZ7XXXXXXX":"7/5xYPO7a+9Po+IE1ySbmu9UB2hWIkWek1Sqn6E4":"us-east-2":"https://s3.us-east-2.amazonaws.com")

2

=s3_file(A1, "bucket1",arg_fileName)

3

=A2.cursor@t().fetch(100)

4

=s3_close(A1)

5

return A3

A1: Connect to the S3 service.

A2: Use file names as the parameter to load files from the storage bucket.

A3: Fetch the first 100 lines.

A4: Close the S3 connection.

Read How to Call a SPL Script in Java to find how to integrate SPL into a Java application.

To deploy S3 external library in SPL, read https://doc.scudata.com/esproc/ext/glwbkbs.html#Deployment.

Source:https://stackoverflow.com/questions/72220023/is-it-possible-to-download-the-first-100-lines-of-a-big-file-with-millions-of-li


 
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