Re: columnar writer with Java

Many thanks for this! Ryan Blue schrieb am 17:44 Dienstag, 8.August 2017: Joerg, Parquet is columnar storage, but a lot of execution engines actually operate on rows. It's common to select columns and push down filters, but then want the rows reconstructed

Re: columnar writer with Java

Joerg, Parquet is columnar storage, but a lot of execution engines actually operate on rows. It's common to select columns and push down filters, but then want the rows reconstructed because it is difficult to work with columnar data. Spark operates on rows and when Parquet stands in for another