ValueDataTypeConverter (Flink : Table : Common 2.1.0 API)

java.lang.Object
- org.apache.flink.table.types.utils.ValueDataTypeConverter

```
@Internal
public final class ValueDataTypeConverter
extends Object
```
Value-based data type extractor that supports extraction of clearly identifiable data types for input conversion.
This converter is more precise than ClassDataTypeConverter because it also considers nullability, length, precision, and scale of values.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Optional<DataType>`	`extractDataType(Object value)`	Returns the clearly identifiable data type if possible.

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

- Method Detail
  - extractDataType
```
public static Optional<DataType> extractDataType(Object value)
```
    Returns the clearly identifiable data type if possible. For example, 12L can be expressed as DataTypes.BIGINT().notNull(). However, for example, null could be any type and is not supported.
    All types of the LogicalTypeFamily.PREDEFINED family, symbols, and arrays are supported.