SourceFunction (teiid-spring-boot-starter 1.7.2 API)

```
@Target(METHOD)
@Retention(RUNTIME)
public @interface SourceFunction
```
Using this annotation define Data Source specific Function.
Using this annotation, you can define a static method on a class that is annotated with @UserDefinedFunctions, at runtime this method will be available for execution in Teiid queries such as SelectQuery. During runtime the function will be evaluated in the source database as it gets pushed down to source for execution
```
 
 @UserDefinedFunctions
 public class UserFunctions {
  @SourceFunction(source="mydb", nativequery="repeat")
  public static String repeat(String p1, int p2) {
    return null;
  }
 }
 
 
```
For an example see UserDefinedFunctions. For more information checkout Source Supported Functions in Teiid.

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  String source
  Defines the datasource name where the function needs to be defined.
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  String nativequery
  Adds teiid_rel:native-query to the function; when omitted the function name executed as is

- Element Detail
  - source
```
String source
```
    Defines the datasource name where the function needs to be defined.
    
    Returns:
    
    source database name
- - nativequery
```
String nativequery
```
    Adds teiid_rel:native-query to the function; when omitted the function name executed as is
    
    Returns:
    
    native query or command
    
    Default:
    
    ""