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Table-valued functions

A table-valued function (TVF) returns a set of rows. You can use a table-valued function anywhere you can use a table. For example, the generate_series TVF generates a range of numbers as rows. The following code example generates a series of numbers from 1 to 100 and selects each number as x from the resulting series: 
SELECT x FROM generate_series(1, 100) r(x);
You can use the list_objects TVF to explore files on Amazon S3. Use functions such as read_parquet to read data from Amazon S3.