Object
org.apache.spark.sql.internal.connector.ExpressionWithToString
org.apache.spark.sql.connector.expressions.aggregate.CountStar
All Implemented Interfaces:
Serializable, AggregateFunc, Expression

@Evolving public final class CountStar extends org.apache.spark.sql.internal.connector.ExpressionWithToString implements AggregateFunc
An aggregate function that returns the number of rows in a group.
Since:
3.2.0
See Also:
  • Constructor Details

    • CountStar

      public CountStar()
  • Method Details

    • children

      public Expression[] children()
      Description copied from interface: Expression
      Returns an array of the children of this node. Children should not change.
      Specified by:
      children in interface Expression