WatermarkSpec (Flink : Table : Common 2.1.0 API)

java.lang.Object
- org.apache.flink.table.legacy.api.WatermarkSpec

```
@Deprecated
@Internal
public class WatermarkSpec
extends Object
```
Deprecated.
See ResolvedSchema and WatermarkSpec.
Watermark metadata defined in TableSchema. It mainly contains 3 parts:
1. the rowtime attribute.
2. the string representation of watermark generation expression.
3. the data type of the computation result of watermark generation expression.

Constructor Summary

Constructors
Constructor Description

WatermarkSpec(String rowtimeAttribute, String watermarkExpressionString, DataType watermarkExprOutputType)
Deprecated.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`String`	`asSummaryString()`	Deprecated.
`boolean`	`equals(Object o)`	Deprecated.
`String`	`getRowtimeAttribute()`	Deprecated. Returns the name of rowtime attribute, it can be a nested field using dot separator.
`String`	`getWatermarkExpr()`	Deprecated. Returns the string representation of watermark generation expression.
`DataType`	`getWatermarkExprOutputType()`	Deprecated. Returns the data type of the computation result of watermark generation expression.
`int`	`hashCode()`	Deprecated.
`String`	`toString()`	Deprecated.

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

- Constructor Detail
  - WatermarkSpec
```
public WatermarkSpec(String rowtimeAttribute,
                     String watermarkExpressionString,
                     DataType watermarkExprOutputType)
```
    Deprecated.
- Method Detail
  - getRowtimeAttribute
```
public String getRowtimeAttribute()
```
    Deprecated.
    
    Returns the name of rowtime attribute, it can be a nested field using dot separator. The referenced attribute must be present in the TableSchema and of type LogicalTypeRoot.TIMESTAMP_WITHOUT_TIME_ZONE.
  - getWatermarkExpr
```
public String getWatermarkExpr()
```
    Deprecated.
    
    Returns the string representation of watermark generation expression. The string representation is a qualified SQL expression string (UDFs are expanded).
  - getWatermarkExprOutputType
```
public DataType getWatermarkExprOutputType()
```
    Deprecated.
    
    Returns the data type of the computation result of watermark generation expression.
  - asSummaryString
```
public String asSummaryString()
```
    Deprecated.
  - equals
```
public boolean equals(Object o)
```
    Deprecated.
    
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Deprecated.
    
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Deprecated.
    
    Overrides:
    
    toString in class Object