SystemTypeInference (Flink : Table : Common 2.0.2-cp1 API)

java.lang.Object
- org.apache.flink.table.types.inference.SystemTypeInference

```
@Internal
public class SystemTypeInference
extends Object
```
Extends the TypeInference function-aware by additional system columns and validation.
During planning system columns are available and can be accessed in SQL, during runtime those columns are not passed or returned by the eval() method. They are handled with custom code paths.
For example, for ProcessTableFunction, this utility class implicitly adds the optional uid and on_time args and an additional rowtime column in the output. Additionally, it adds a validation layer for complex StaticArguments.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  SystemTypeInference()
- Method Summary
  
  All Methods Static Methods Concrete Methods
  Modifier and Type Method Description
  
  static TypeInference of(FunctionKind functionKind, TypeInference origin)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- SystemTypeInference
```
public SystemTypeInference()
```

Method Detail

of

public static TypeInference of(FunctionKind functionKind,
                               TypeInference origin)