Snowflake - Allow PARSE_HEADER to be used with INFER_SCHEMA for CSVs

[b-per]

Describe the feature

Allow the ability to get the CSV column names when using INFER_SCHEMA and CSVs

Describe alternatives you've considered

If you use INFER_SCHEMA and CSVs all the columns are called c1, c2 etc...

Additional context

The closed issue #254 mentions this Snowflake issue but I am wondering if this is really an issue in that case or not.

This might require a quick spike to test

Who will this benefit?

People wanting to load CSVs without listing every column

[github-actions]

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