com.twitter.scalding.parquet

HasColumnProjection

trait HasColumnProjection extends AnyRef

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DailySuffixParquetThrift, FixedPathParquetThrift, HourlySuffixParquetThrift, ParquetThrift, ParquetThriftBase
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  8. final def columnProjectionString: Option[ColumnProjectionString]

    Parquet accepts globs separated by the ; character

    Parquet accepts globs separated by the ; character

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    protected[com.twitter.scalding.parquet]

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  22. final def wait(arg0: Long): Unit

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  23. def withColumnProjections: Set[String]

    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.

Deprecated Value Members

  1. def withColumns: Set[String]

    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.

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    @deprecated
    Deprecated

    (Since version 0.15.1) Use withColumnProjections, which uses a different glob syntax

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