Parquet accepts globs separated by the ; character
Parquet accepts globs separated by the ; character
The format for specifying columns is described here: https://github.
The format for specifying columns is described here: https://github.com/apache/parquet-mr/blob/master/parquet_cascading.md#21-projection-pushdown-with-thriftscrooge-records
Note that the format described there says that multiple globs can be combined with a ; character. Instead, we use a Set() here and will eventually join the set on the ; character for you.
(Since version 0.9.0) replace with Mappable.toIterator
Deprecated.
Deprecated. Use withColumnProjections, which uses a different glob syntax.
The format for specifying columns is described here: https://github.com/apache/parquet-mr/blob/3df3372a1ee7b6ea74af89f53a614895b8078609/parquet_cascading.md#2-projection-pushdown (Note that this link is different from the one below in withColumnProjections)
Note that the format described there says that multiple globs can be combined with a ; character. Instead, we use a Set() here and will eventually join the set on the ; character for you.
(Since version 0.15.1) Use withColumnProjections, which uses a different glob syntax