FrameBasedInlineJoinableFactory (druid-processing 28.0.0 API)

java.lang.Object
- org.apache.druid.segment.join.FrameBasedInlineJoinableFactory

All Implemented Interfaces:

JoinableFactory
```
public class FrameBasedInlineJoinableFactory
extends Object
implements JoinableFactory
```
Creates a joinable from the FrameBasedInlineDataSource. This materializes the datasource to an InlineDataSource, before creating the joinable on it, which carries the overhead of this conversion.

Constructor Summary

Constructors
Constructor Description

FrameBasedInlineJoinableFactory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Optional<Joinable>`	`build(DataSource dataSource, JoinConditionAnalysis condition)`	Create a Joinable object.
`boolean`	`isDirectlyJoinable(DataSource dataSource)`	Returns true if a `Joinable` may be created for a given `DataSource`, but is not a guarantee that `JoinableFactory.build(org.apache.druid.query.DataSource, org.apache.druid.segment.join.JoinConditionAnalysis)` will return a non-empty result.

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

Methods inherited from interface org.apache.druid.segment.join.JoinableFactory
computeJoinCacheKey

- Constructor Detail
  - FrameBasedInlineJoinableFactory
```
public FrameBasedInlineJoinableFactory()
```
- Method Detail
  - isDirectlyJoinable
```
public boolean isDirectlyJoinable(DataSource dataSource)
```
    Description copied from interface: JoinableFactory
    
    Returns true if a Joinable **may** be created for a given DataSource, but is not a guarantee that JoinableFactory.build(org.apache.druid.query.DataSource, org.apache.druid.segment.join.JoinConditionAnalysis) will return a non-empty result. Successfully building a Joinable might require specific criteria of the JoinConditionAnalysis.
    
    Specified by:
    
    isDirectlyJoinable in interface JoinableFactory
  - build
```
public Optional<Joinable> build(DataSource dataSource,
                                JoinConditionAnalysis condition)
```
    Description copied from interface: JoinableFactory
    
    Create a Joinable object. This may be an expensive operation involving loading data, creating a hash table, etc.
    
    Specified by:
    
    build in interface JoinableFactory
    
    Parameters:
    
    dataSource - the datasource to join on
    
    condition - the condition to join on
    
    Returns:
    
    a Joinable if this datasource + condition combo is joinable; empty if not