LazyRow (Pinot local segment implementations 1.1.0 API)

java.lang.Object
- org.apache.pinot.segment.local.segment.readers.LazyRow

```
public class LazyRow
extends Object
```
A wrapper class to read column values of a row for a given IndexSegment and docId.
The advantage of having wrapper over segment and docId is column values are read only when getValue(String) is invoked. This is useful to reduce the disk reads incurred due to loading the complete previous row during merge step.
The LazyRow has an internal state and should not be used concurrently. To reuse the LazyRow, create an instance using no arg constructor and re-initialise using init(IndexSegment, int)

Constructor Summary

Constructors
Constructor Description

LazyRow()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear()`
`Set<String>`	`getColumnNames()`
`Object`	`getValue(String fieldName)`	Computes a field's value in an indexed row.
`void`	`init(IndexSegment segment, int docId)`
`boolean`	`isNullValue(String fieldName)`

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

Constructor Detail
- LazyRow
```
public LazyRow()
```

Method Detail

init

public void init(IndexSegment segment,
                 int docId)

getValue
```
@Nullable
public Object getValue(String fieldName)
```
Computes a field's value in an indexed row.

Parameters:

fieldName -

Returns:

Returns value or null for persisted null values

isNullValue

public boolean isNullValue(String fieldName)

clear
```
public void clear()
```

getColumnNames
```
public Set<String> getColumnNames()
```