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Extracting data from multiple files about usql HOT 2 CLOSED

azure avatar azure commented on May 29, 2024
Extracting data from multiple files

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Comments (2)

michaelamadi avatar michaelamadi commented on May 29, 2024

Hi Rakesh,

You'll need to use a file set pattern as described here: https://msdn.microsoft.com/en-us/library/azure/mt621294.aspx

In your specific case you could use the following if you don't need access to the file name values in the row set returned:
@carrierdata =
EXTRACT Carrier string,
CarrierCode string
FROM "/dimensiondata/carrier/{*}"
USING Extractors.Csv();

If you do need access to the file name values, then you can map the wild card to a virtual column like this:
@carrierdata =
EXTRACT Carrier string,
CarrierCode string,
FileName string
FROM "/dimensiondata/carrier/{FileName:*}"
USING Extractors.Csv();

Please note that the virtual column, in this case ‘FileName’, must also appear in the column definition list of the EXTRACT expression.

Regards,

Michael

from usql.

rakeshdavanum avatar rakeshdavanum commented on May 29, 2024

Hi Michael,

Thank you so much! That worked :) Being able to extract the FileName was very useful too.

Thanks & Regards,
Rakesh

from usql.

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