org.apache.spark.sql.connector.expressions.aggregate

Class GeneralAggregateFunc

Object

org.apache.spark.sql.internal.connector.ExpressionWithToString

org.apache.spark.sql.connector.expressions.aggregate.GeneralAggregateFunc

All Implemented Interfaces:

java.io.Serializable, AggregateFunc, Expression

@Evolving
public final class GeneralAggregateFunc
extends org.apache.spark.sql.internal.connector.ExpressionWithToString
implements AggregateFunc

The general implementation of AggregateFunc, which contains the upper-cased function name, the `isDistinct` flag and all the inputs. Note that Spark cannot push down partial aggregate with this function to the source, but can only push down the entire aggregate.

The currently supported SQL aggregate functions:

1. VAR_POP(input1)

   Since 3.3.0

2. VAR_SAMP(input1)

   Since 3.3.0

3. STDDEV_POP(input1)

   Since 3.3.0

4. STDDEV_SAMP(input1)

   Since 3.3.0

5. COVAR_POP(input1, input2)

   Since 3.3.0

6. COVAR_SAMP(input1, input2)

   Since 3.3.0

7. CORR(input1, input2)

   Since 3.3.0

8. REGR_INTERCEPT(input1, input2)

   Since 3.4.0

9. REGR_R2(input1, input2)

   Since 3.4.0

10. REGR_SLOPE(input1, input2)

    Since 3.4.0

11. REGR_SXY(input1, input2)

    Since 3.4.0

Since:

3.3.0

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.apache.spark.sql.connector.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Constructor Summary

Constructors

Constructor and Description
GeneralAggregateFunc(String name, boolean isDistinct, Expression[] children)

Method Summary

Modifier and Type	Method and Description
Expression[]	children() Returns an array of the children of this node.
boolean	equals(Object o)
int	hashCode()
boolean	isDistinct()
String	name()

Methods inherited from class org.apache.spark.sql.internal.connector.ExpressionWithToString

describe, references, toString

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.spark.sql.connector.expressions.Expression

describe, references

Constructor Detail

GeneralAggregateFunc

public GeneralAggregateFunc(String name,
                            boolean isDistinct,
                            Expression[] children)

Method Detail

name

public String name()

isDistinct

public boolean isDistinct()

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

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object