SummaryFunctionType (Smart GWT EE Server API 5.0p (2021-05-26))

com.isomorphic.datasource.SummaryFunctionType

```
public class SummaryFunctionType
```
Function to produce a summary value based on an array of records and a field definition. An example usage is the 'summary row', where a row is shown at the bottom of the listGrid containing summary information about each column.
SummaryFunctions may be specified in one of 2 ways:
- as an explicit function that takes 3 parameters:
  - records an array of records
  - field the field definition for which the summary is required
- As an predefined SummaryFunctionType type.
See Also:
Serialized Form

Field Summary

Fields
Modifier and Type	Field and Description
`static SummaryFunctionType`	`AVG` Iterates through the set of records, picking up all numeric values for the specified field and determining the mean value.
`static SummaryFunctionType`	`CONCAT` Implemented as SQL CONCAT function.
`static SummaryFunctionType`	`COUNT` Returns a numeric count of the total number of records passed in.
`static SummaryFunctionType`	`FIRST` Currently behaves the same way as `SummaryFunctionType.MIN`.
`static SummaryFunctionType`	`MAX` Iterates through the set of records, picking up all values for the specified field and finding the maximum value.
`static SummaryFunctionType`	`MIN` Iterates through the set of records, picking up all values for the specified field and finding the minimum value.
`static SummaryFunctionType`	`SUM` Iterates through the set of records, picking up and summing all numeric values for the specified field.

- Field Detail
  - FIRST
```
public static final SummaryFunctionType FIRST
```
    Currently behaves the same way as SummaryFunctionType.MIN.
  - SUM
```
public static final SummaryFunctionType SUM
```
    Iterates through the set of records, picking up and summing all numeric values for the specified field. Returns null to indicate invalid summary value if any non numeric field values are encountered.
  - AVG
```
public static final SummaryFunctionType AVG
```
    Iterates through the set of records, picking up all numeric values for the specified field and determining the mean value. Returns null to indicate invalid summary value if any non numeric field values are encountered.
  - MAX
```
public static final SummaryFunctionType MAX
```
    Iterates through the set of records, picking up all values for the specified field and finding the maximum value. Handles numeric fields and date type fields only. Returns null to indicate invalid summary value if any non numeric/date field values are encountered.
  - MIN
```
public static final SummaryFunctionType MIN
```
    Iterates through the set of records, picking up all values for the specified field and finding the minimum value. Handles numeric fields and date type fields only. Returns null to indicate invalid summary value if any non numeric field values are encountered.
  - COUNT
```
public static final SummaryFunctionType COUNT
```
    Returns a numeric count of the total number of records passed in.
  - CONCAT
```
public static final SummaryFunctionType CONCAT
```
    Implemented as SQL CONCAT function. Supported only by SQLDataSource with Oracle DB driver.

Class SummaryFunctionType

Field Summary

Field Detail

FIRST

SUM

AVG

MAX

MIN

COUNT

CONCAT