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CatalogColumnStat

Creating Instance

CatalogColumnStat takes the following to be created:

  • Distinct Count (number of distinct values)
  • Minimum Value
  • Maximum Value
  • Null Count (number of null values)
  • Average length of the values (for fixed-length types, this should be a constant)
  • Maximum length of the values (for fixed-length types, this should be a constant)
  • Histogram
  • 2

Note

CatalogColumnStat uses the same input parameters as ColumnStat.

CatalogColumnStat is created when:

fromMap

fromMap(
  table: String,
  colName: String,
  map: Map[String, String]): Option[CatalogColumnStat]

fromMap creates a CatalogColumnStat using the given map (with the colName-prefixed keys).

fromMap is used when:

toPlanStat

toPlanStat(
  colName: String,
  dataType: DataType): ColumnStat

toPlanStat converts this CatalogColumnStat to a ColumnStat.

toPlanStat is used when: