Can this action be used on data sources that are not yet loaded into CAS?

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Réponse

Yes. By using the `table` parameter to point to a data source file and providing the necessary connection details in the `dataSourceOptions` parameter, the `columnInfo` action can show column information without loading the entire file into memory.
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columnInfo

table

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Other questions about columnInfo
What is the primary purpose of the `table.columnInfo` action in SAS Viya? Is it possible to get information for only a subset of columns in a table? How do I specify the table for which I want to get column information? What details are included in the result of the `columnInfo` action?
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