Hi, I have a use-case where I want a UDF to return dynamic number of columns based on parameter.
Consider a udf function called return_cols which takes two params, fields and a comma-separated list of output fields eg. select return_cols(table-field, "foo,bar") from table or select return_cols(table-field, "foo,bar,baz") from table. The first call return 2 columns back while the second call returns 3 columns back. I could technically return a map of things but that would mean I will have to wrap the query and select map.foo, map.bar, map.baz. I had rather output the data with column headers and let the downstream tools figure out how to consume it. Is it possible to output columns headers through a hive genericudf ? I looked around for example but could not find anything. Thanks, Viral
