(stepfunctions): No option for CSV Delimiter

[stephen-christie-ss]

Describe the feature

The CSVDelimiter field for the Step Function ItemReader is not available in the S3CsvItemReader.

Use Case

I need to select a semicolon delimiter, to support European CSV files.

Proposed Solution

No response

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

aws-cdk-lib 2.176.0

Environment details (OS name and version, etc.)

Ubuntu 24.04

[pahud]

Yes I guess here's what we need to do to fix this:

1. The S3CsvItemReaderProps interface needs to be updated to include the csvDelimiter property
2. The S3CsvItemReader class needs to be modified to include this property in its render() method

We welcome PRs.

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