case class CatalogColumnStat(distinctCount: Option[BigInt] = None, min: Option[String] = None, max: Option[String] = None, nullCount: Option[BigInt] = None, avgLen: Option[Long] = None, maxLen: Option[Long] = None, histogram: Option[Histogram] = None, version: Int = CatalogColumnStat.VERSION) extends Product with Serializable
This class of statistics for a column is used in CatalogTable to interact with metastore.
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- new CatalogColumnStat(distinctCount: Option[BigInt] = None, min: Option[String] = None, max: Option[String] = None, nullCount: Option[BigInt] = None, avgLen: Option[Long] = None, maxLen: Option[Long] = None, histogram: Option[Histogram] = None, version: Int = CatalogColumnStat.VERSION)
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- val avgLen: Option[Long]
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- val distinctCount: Option[BigInt]
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- val histogram: Option[Histogram]
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- val max: Option[String]
- val maxLen: Option[Long]
- val min: Option[String]
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- val nullCount: Option[BigInt]
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def
toMap(colName: String): Map[String, String]
Returns a map from string to string that can be used to serialize the column stats.
Returns a map from string to string that can be used to serialize the column stats. The key is the name of the column and name of the field (e.g. "colName.distinctCount"), and the value is the string representation for the value. min/max values are stored as Strings. They can be deserialized using CatalogColumnStat.fromExternalString.
As part of the protocol, the returned map always contains a key called "version". Any of the fields that are null (None) won't appear in the map.
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def
toPlanStat(colName: String, dataType: DataType): ColumnStat
Convert CatalogColumnStat to ColumnStat.
- val version: Int
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