AggregateDataCovar

java.lang.Object
- org.h2.expression.aggregate.AggregateData
- - org.h2.expression.aggregate.AggregateDataBinarySet
  - - org.h2.expression.aggregate.AggregateDataCovar

```
final class AggregateDataCovar
extends AggregateDataBinarySet
```
Data stored while calculating a COVAR_POP, COVAR_SAMP, or REGR_SXY aggregate.

Field Summary

Fields
Modifier and Type Field Description

private AggregateType aggregateType

private long count

private double sumX

private double sumY

private double sumYX

Constructor Summary

Constructors
Constructor Description

AggregateDataCovar(AggregateType aggregateType)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) void`	`add(SessionLocal session, Value yValue, Value xValue)`
`(package private) Value`	`getValue(SessionLocal session)`	Get the aggregate result.

Methods inherited from class org.h2.expression.aggregate.AggregateDataBinarySet
add

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - aggregateType
```
private final AggregateType aggregateType
```
  - count
```
private long count
```
  - sumY
```
private double sumY
```
  - sumX
```
private double sumX
```
  - sumYX
```
private double sumYX
```
- Constructor Detail
  - AggregateDataCovar
```
AggregateDataCovar(AggregateType aggregateType)
```
    Parameters:
    
    aggregateType - the type of the aggregate operation
- Method Detail
  - add
```
void add(SessionLocal session,
         Value yValue,
         Value xValue)
```
    Specified by:
    
    add in class AggregateDataBinarySet
  - getValue
```
Value getValue(SessionLocal session)
```
    Description copied from class: AggregateData
    
    Get the aggregate result.
    
    Specified by:
    
    getValue in class AggregateData
    
    Parameters:
    
    session - the session
    
    Returns:
    
    the value