hi Rahul, This is not easy to do in the C++ API right now, because the writer must be initialized with a static schema. Theoretically you could expand the schema while you are writing the first row group, but it would be difficult to make this possible.
The writer API is also designed for writing one column at a time instead of one row at a time, so one option for you is to create an auxiliary data structure (this is not provided by the Parquet C++ library) to convert records into columnar form, then write to the Parquet writer API once you have appended all your records and know the final schema. - Wes On Fri, Aug 25, 2017 at 1:34 PM, rahul challapalli <[email protected]> wrote: > Hi, > > I am using the parquet writer (cpp) and I want to see if I can add a new > column after writing out a few records, but before the close method is > called. An example would be helpful if this is feasible. > > Rahul
