ColumnSummary (Flink : Java 1.20.1-cp2 API)

java.lang.Object
- org.apache.flink.api.java.summarize.ColumnSummary

Direct Known Subclasses:

BooleanColumnSummary, NumericColumnSummary, ObjectColumnSummary, StringColumnSummary
```
@Deprecated
@PublicEvolving
public abstract class ColumnSummary
extends Object
```
Deprecated.
All Flink DataSet APIs are deprecated since Flink 1.18 and will be removed in a future Flink major version. You can still build your application in DataSet, but you should move to either the DataStream and/or Table API.

Summary for a column of values.

See Also:

FLIP-131: Consolidate the user-facing Dataflow SDKs/APIs (and deprecate the DataSet API

Constructor Summary

Constructors
Constructor Description

ColumnSummary()
Deprecated.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`boolean`	`containsNonNull()`	Deprecated. True if this column contains any non-null values.
`boolean`	`containsNull()`	Deprecated. True if this column contains any null values.
`abstract long`	`getNonNullCount()`	Deprecated. The number of non-null values in this column.
`abstract long`	`getNullCount()`	Deprecated. The number of null values in this column.
`long`	`getTotalCount()`	Deprecated. The number of all rows in this column including both nulls and non-nulls.

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

- Constructor Detail
  - ColumnSummary
```
public ColumnSummary()
```
    Deprecated.
- Method Detail
  - getTotalCount
```
public long getTotalCount()
```
    Deprecated.
    
    The number of all rows in this column including both nulls and non-nulls.
  - getNonNullCount
```
public abstract long getNonNullCount()
```
    Deprecated.
    
    The number of non-null values in this column.
  - getNullCount
```
public abstract long getNullCount()
```
    Deprecated.
    
    The number of null values in this column.
  - containsNull
```
public boolean containsNull()
```
    Deprecated.
    
    True if this column contains any null values.
  - containsNonNull
```
public boolean containsNonNull()
```
    Deprecated.
    
    True if this column contains any non-null values.