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org.apache.spark.sql.catalyst.plans.logical

HistogramSerializer

object HistogramSerializer

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  1. final def !=(arg0: Any): Boolean
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    @throws( ... ) @native()
  6. final def deserialize(str: String): Histogram

    Deserializes a given string to a histogram.

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  16. final def serialize(histogram: Histogram): String

    Serializes a given histogram to a string.

    Serializes a given histogram to a string. For advanced statistics like histograms, sketches, etc, we don't provide readability for their serialized formats in metastore (string-to-string table properties). This is because it's hard or unnatural for these statistics to be human readable. For example, a histogram usually cannot fit in a single, self-described property. And for count-min-sketch, it's essentially unnatural to make it a readable string.

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  18. def toString(): String
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