TableStats (Flink : 2.0-SNAPSHOT API)

java.lang.Object
- org.apache.flink.table.plan.stats.TableStats

@PublicEvolving
public final class TableStats
extends Object

Table statistics.

Field Summary

Fields
Modifier and Type Field Description

static TableStats UNKNOWN
Unknown definition for table stats: Unknown rowCount is -1.

Constructor Summary

Constructors
Constructor Description

TableStats(long rowCount)

TableStats(long rowCount, Map<String,ColumnStats> colStats)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`TableStats`	`copy()`	Create a deep copy of "this" instance.
`boolean`	`equals(Object o)`
`Map<String,ColumnStats>`	`getColumnStats()`
`long`	`getRowCount()`
`int`	`hashCode()`
`TableStats`	`merge(TableStats other, Set<String> partitionKeys)`	Merges two table stats.
`String`	`toString()`

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

- Field Detail
  - UNKNOWN
```
public static final TableStats UNKNOWN
```
    Unknown definition for table stats: Unknown rowCount is -1. Unknown colStats is not exist in map.
- Constructor Detail
  - TableStats
```
public TableStats(long rowCount)
```
  - TableStats
```
public TableStats(long rowCount,
                  Map<String,ColumnStats> colStats)
```
- Method Detail
  - getRowCount
```
public long getRowCount()
```
  - getColumnStats
```
public Map<String,ColumnStats> getColumnStats()
```
  - copy
```
public TableStats copy()
```
    Create a deep copy of "this" instance.
    
    Returns:
    
    a deep copy
  - merge
```
public TableStats merge(TableStats other,
                        @Nullable
                        Set<String> partitionKeys)
```
    Merges two table stats. When the stats are unknown, whatever the other are, we need return unknown stats. See UNKNOWN.
    
    Parameters:
    
    other - The other table stats to merge.
    
    Returns:
    
    The merged table stats.
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object